Dr BALASUBRAHMANYAM PESALA
Senior Principal Scientist
CEERI
- bala@ceeri.res.in
- Academic Background
- Professional Background
- Areas of Scientific Interest
- Awards & Honours
- Publications
- Patents, Technology Transfer etc
- Technology Transfer
Academic Background
- Post Doctoral Fellowship at USA during the year 1998.
- Ph.D Thesis Title : Studies on the instrumentation development for the measurements of elastic constants of paper and paper products having applications in production and quality control.
- M.Sc., (Physics)
- B.Sc., (Physics)
Professional Background
- Scientist-in-charge of the Centre.
- 31-10-1988 - 30-101993 Scientist -B
- 31-10-1993 - 30-10-1998 Scientist-C
- 31-10-1998 - 30-10-2003 Scientist-EI
- 31-10-2003 - 30-10-2008 Scientist-EII
- 31-10-2008 - 30-10-2014 Senior Principal Scientist
- 31-10-2014 - till date Chief Scientist
- 01-7-2016 - till date Scientist-in-charge
- Guiding the D projects of the Centre in the areas of machine vision systems, IR signal analysis & instrumentation to cater to the needs of food & horticulture sectors. Many new projects in key industrial sectors identified, linkages established and proposals submitted for external funding with my guidance.
- Overall management of the Centre in day-to-day activities.
- Co-ordination with CSIR Madras Complex & CSIR-SERC.
- Co-ordination with CSIR-CEERI, Pilani in R&D Programmes and other activities.
Areas of Scientific Interest
- Design & Development of off-line electronic systems for industrial applications like paper industry.
- Machine vision system for societal applications.
- NIRS for industrial instrumentation.
- Signal analytics under Cyber Physical Systems.
- Organization of International conference, training programs, workshops, etc.
- Recognized as guide for Ph.D programmes of various universities.
- Project Management & Business Development
Awards & Honours
- 1990 Foundation Day Merit award of CEERI, Pilani.
- 1998 Achievement/merit award from Oakland University, USA for the outstanding contribution towards teaching & research during the fellowship program at the Department of Computer Science, Oakland University for the year 1998.
- 2001 First Best paper award for contribution to the publication of the paper on ’Optical paper formation Analyser’ –Rao P.Sudhakara, Sridhar.R, Gopal A, Meenakshi.K, Revathy.R, Chitra.K and Palaniandi.D - Journal of IPPTA, Annual Convention Issue 2001, p 23-30.
- 2001S Aixth Best paper award for contribution to the publication of the paper on ’Novel shape feature extraction and apples classification using computer vision’ -(P.Sudhakara Rao, Dr.A.Gopal & S.Md.Iqbal) – published in the proceedings of Second International Conference on EIT-2001, held at USA during June 7-9, 2001
- 2004 First Best paper award for contribution to the publication of the paper on ’Image processing algorithms for shape analysis of potatoes –(Gopal.A, Mr.Md.Iqbal and Revathy.R)- published in the proceedings of 4th International Conference on Trends in Industrial Measurements and Automation during December 15-18, 2004
- 2008 ISA Asia Pacific District –14 Prof. LIPTAK award for the year 2008 for the significant contribution to Instrumentation Automation through the involvement in ISA south India section activities
- 2014 One of the best paper recognition of the conference of the paper “Detection and Quantification of Adulteration in Honey through Near Infrared Spectroscopy”- A.Gopal & C.Kumaravelu - Paper published in the first proceedings of the first International conference on Food Properties
- 2015 Best Paper award - "Design, development and construction of a stationary weighing mechanism for handling citrus fruits using Maltese Cross Principle" at the "1st International Conference on Advances in Science, Management and Engineering" held at Chennai on 26-12-2015.
- 2016 Best paper award “Quality assessment of single cotton Seed based on its protein and oil content using NIRS – C.Kumaravelu A.Gopal.”- International conference on recent trends in engineering science & management (ICRTESM 2016), held at Madurai during 15-16, July 2016
Publications
Bala Pesala, Google Scholar Citations as of 13/4/2018: 720 (https://scholar.google.com.au/citations?user=cNxcKfUAAAAJ)
- Journal Publications
- Peer reviewed International Conference Proceedings (Outside India)
- Peer reviewed International Conferences (In India)
- Sumon Dey, Madan Kumar Lakshmanan, Bala Pesala," Optimal Solar Tree Design for Increased Flexibility in Seasonal Energy Extraction," Renewable Energy, 125, pp 1038-1048 (2018).
- J Poojali, S Ray, Bala Pesala, CV Krishnamurthy, K Arunachalam," Miniaturised millimetre wave frequency selective surface for atmospheric remote sensing," Electronics Letters 53 (10), 663-665 (2017)
- Jayaprakash Poojali, Shaumik Ray, Bala Pesala, Krishnamurthy Chitti, Kavitha Arunachalam, "Quad band Polarization Insensitive Millimeter Wave Frequency Selective Surface for Remote Sensing," IEEE Antennas and Wireless Propagation Letters, 99, (2017).
- Bala Pesala, Weijian Yang, Connie J Chang-Hasnain, "Compact On-Chip Optical Components Based on Multimode Interference Design Using High-Contrast Grating Hollow-Core Waveguides", IEEE Journal Of Selected Topics In Quantum Electronics, 22, (2016).
- Jayaprakash Poojali, Shaumik Ray, Bala Pesala, Krishnamurthy V Chitti, Kavitha Arunachalam, " A Tri-Band Frequency Selective Surface (FSS) to Diplex Widely Separated Bands for Millimeter Wave Remote Sensing" Journal of Infrared, Millimetre and Terahertz Waves, 37 (2016).
- Ramendra Pandey and Bala Pesala, “Heat and Mass Transfer Analysis of a Pot-in-Pot Refrigerator using Reynolds Flow Model,” J. Thermal Sci. Eng. Appl, (2016).
- H. Agarwal, V. R. Unni, K. T. Akhil, N. T. Ravi, S. M. Iqbal, R. I. Sujith and Bala Pesala,“Compact standing wave thermoacoustic generator for power conversion applications”, Applied Acoustics, vol. 110, pp. 110–118, (2016).
- V. P. Anand, S. Indumathi and Bala Pesala, "Solar power intermittency reduction using supercapacitors integrated with solar panels," J. Renewable Sustainable Energy 7, 043140 (2015).
- Vishnu R. Unni, Yogesh Prasaad M. S., N. T. Ravi, S.Md. Iqbal, Bala Pesala, R. I. Sujith, “Experimental investigation of bifurcations in a thermoacoustic engine”, International journal of spray and combustion dynamics (special issue), 7(2), 113-130 (2015).
- Jyotirmayee Dash, Shaumik Ray, Kathirvel Nallappan, Vaibhav Vilasrao Kaware, Nitin Basutkar, Rajesh Gonnade, Ashootosh V Ambade, Kavita Joshi, Bala Pesala, "Terahertz Spectroscopy and Solid-State Density Functional Theory Calculations of Cyanobenzaldehyde Isomers," J. Phys. Chem. A, 2015, 119 (29), pp 7991–7999, (2015).
- D Nielsen, A Matsudaira, SL Chuang, B Pesala, F Sedgwick, CJ Chang-Hasnain, "Fast-Light to Slow-Light Switching in a Laser Cavity", IEEE Photonics Technology Letters 7 (2011).
- Vadim Karagodsky, Bala Pesala, Forrest G. Sedgwick, and Connie J. Chang-Hasnain, "Dispersion properties of high-contrast grating hollow-core waveguides," Opt. Lett. 35, 4099-4101 (2010).
- Vadim Karagodsky, Bala Pesala, Christopher Chase, Werner Hofmann, Fumio Koyama, and Connie J. Chang-Hasnain, "Monolithically integrated multi-wavelength VCSEL arrays using high-contrast gratings," Optics Express 18, 694-699 (2010).
- Bala Pesala, Forrest G. Sedgwick, Alexander V. Uskov, and Connie Chang-Hasnain, "Greatly enhanced slow and fast light in chirped pulse semiconductor optical amplifiers: Theory and experiments," Optics Express 17, 2188-2197 (2009).
- Ye Zhou, Vadim Karagodsky, Bala Pesala, Forrest G. Sedgwick, and Connie J. Chang-Hasnain, "A novel ultra-low loss hollow-core waveguide using subwavelength high-contrast gratings," Optics Express 17, 1508-1517 (2009).
- Ye Zhou, Michael CY Huang, Christopher Chase, Vadim Karagodsky, Michael Moewe, Bala Pesala, Forrest G Sedgwick, Connie J Chang-Hasnain, "High-index-contrast grating (HCG) and its applications in optoelectronic devices," IEEE Journal of Selected Topics in Quantum Electronics, Vol. 15 (5) (2009).
- Bala Pesala, Forrest Sedgwick, Alexander Uskov, and Connie Chang-Hasnain, "Ultrahigh-bandwidth electrically tunable fast and slow light in semiconductor optical amplifiers [Invited]," Journal of optical Society of America B 25, C46-C54 (2008).
- Bala Pesala, Forrest Sedgwick, Alexander V. Uskov, Connie Chang-Hasnain, “Electrically tunable fast light at THz bandwidth using cascaded semiconductor optical amplifiers”, Optics Express Vol. 15 (24) (2007).
- F. G. Sedgwick, Bala Pesala, J. Y. Lin, W. S. Ko, X. Zhao, and C. J. Chang-Hasnain, “THz-bandwidth tunable slow light in semiconductor optical amplifiers,” Optics Express 15, 747-753 (2007).
- Forrest Sedgwick, Bala Pesala, Alexander V. Uskov, Connie Chang-Hasnain, “Chirp enhanced fast light in semiconductor optical amplifiers,” Optics Express Vol. 15, No. 26, 17631-17638 (2007).
- Bala Pesala, Zhangyuan Chen, Connie Chang-Hasnain, “Experimental demonstration of Slow and Superluminal light in Semiconductor Optical Amplifiers,” Optics Express 14 (26), 12968-12975 (2006).
- M. Huang, K.B.Cheng, Y. Zhou, P. Bala, C. J. Chang-Hasnain, "Demonstration of Piezo-Electric Actuated GaAs-Based MEMS Tunable VCSEL," IEEE Photonics Technology Letters, (2006).
- Xiaoxue Zhao, Phedon Palinginis, Bala Pesala, Philip Hemmer and Connie J. Chang-Hasnain, “Tunable Ultra-slow Light in Vertical-Cavity Surface-Emitting Laser Amplifier,” Optics Express, 13, No.20, (2006).
- P. Bala Subrahmanyam, Y. Zhou, L. Chrostowski, C. J. Chang-Hasnain, "VCSEL Tolerance to Optical Feedback," IEE Electronics Letters, October 13, (2005).
- P. Bala Subrahmanyam and R. I. Sujith, “Propagation of Sound in Inhomogeneous Media: Exact Transient Solutions in Curvilinear Coordinates,” ASME Journal of Vibration and Acoustics, Volume 125, pp. 133-136, (2003).
- P. Bala Subrahmanyam, R. I. Sujith and M. Ramakrishna “Determination of unsteady heat release distribution from acoustic pressure measurements: A reformulation of the inverse problem,” Journal of Acoustical Society of America, (2003).
- P. Bala Subrahmanyam and R. I. Sujith, “Acoustic Fields in Inhomogeneous Media: Some Exact Harmonic Solutions for Variable Area Ducts and Curvilinear Geometries,” ACTA Acoustica united with Acustica, 88, 837-841, (2002).
- P. Bala Subrahmanyam and R. I. Sujith, "Exact Solutions for Axisymmetric Vibrations of Solid Circular and Annular Membranes with Continuously Varying Density," Journal of Sound and Vibration, Vol. 248, No. 2, pp. 371-378, (2001).
- P. Bala Subrahmanyam, R. I. Sujith and T. Lieuwen "A Family of Exact Transient Solutions for Acoustic Wave Propagation in Inhomogeneous, Non-Uniform Area Ducts," Journal of Sound and Vibration, Vol. 240, No. 4, pp. 705-715, (2001).
- Shaumik Ray, Jyotirmayee Dash, Nirmala Devi, Saptarshi Sasmal, Bala Pesala, " Understanding the effect of nanosilica incorporation on dicalcium silicate hydration using terahertz spectroscopy," Proc. of SPIE, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XI, 10531, San Francisco, U.S.A (2018).
- Harikrishnan Kaimal, Nirmala Devi, Shaumik Ray, Prabhu Rajagopal, Krishnan Balasubramanian, Bala Pesala," Non-destructive evaluation of GFRP-wood sandwich structure composite using terahertz imaging," Proc. of SPIE, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XI, 10531, San Francisco, U.S.A (2018).
- MVN Surendra Gupta, E Ameen, Sruti Menon, Lal Krishna AS, Varun Raghunathan, Bala Pesala," High contrast grating based intrinsic fluorescence enhancing substrates for water contamination detection, Proc. of SPIE, High Contrast Metastructures VII, 10542, San Francisco, U.S.A (2018).
- MVN Surendra Gupta, E Ameen, Juan R Llobet, Ananthanarayanan Veeraragavan, Bala Pesala," High contrast grating based thermal emitters for portable thermophotovoltaic systems," Proc. of SPIE, High Contrast Metastructures VII, 10542, San Francisco, U.S.A (2018).
- Tavpritesh Sethi, Suriya Prakash, Surendra Gupta, Meera Subramanian, Gautam Morey, Debasis Dash, Anurag Agrawal and Bala Pesala, "Wearable Device for Non-Invasive Beat-to-Beat Blood Pressure Monitoring using Pulse Transit Time" IEEE Engineering in Medicine and Biology Society (EMBC'17) Korea, (2017).
- Kiran Vaddi,Ameen E, K.S. Reddy, Bala Pesala " Luminescent Solar Concentrator using High Contrast Gratings," Photovoltaic Science and Engineering Conference-26, Singapore (2017).
- Leonardo Micheli, Eduardo F.Fernández, Greg P. Smestad, Hameed Alrashidi, Nabin Sarmah, Nazmi Sellami, Ibrahim A. I. Hassan, Amal Kasry, Gustavo Nofuentes, Neeru Sood, Bala Pesala, S.Senthilarasu, Florencia Almonacid, K.S. Reddy, Matthew Muller, Tapas K. Mallick," A unified global investigation on the spectral effects of soiling losses of PV glass substrates: preliminary results," IEEE Photovoltaic Specialists Conference (PVSC)-44, Washington D.C, U.S.A (2017).
- Jayaprakash Poojali, Shaumik Ray, Bala Pesala, Krishnamoorthy V Chitti, Kavitha Arunachalam," Study of factors influencing performance of substrate backed FSS for millimeter wave atmopsheric remote sensing," 11th European Conference on Antennas and Propagation (EUCAP), 2017.
- N. Devi, J. Dash, S. Ray and Bala Pesala “Thickness measurement of tablet coating using continuous-wave terahertz reflection spectroscopy”, Proc. SPIE 9747, Terahertz, RF, Millimeter and Sub-millimeter-Wave technology and Applications IX, 974709, San Francisco, U.S.A (2016).
- S. Ray, N. Devi, J. Dash, G. Rambabu, S. D. Bhat, and Bala Pesala “Enhancement of water retention in UV-exposed fuel-cell proton exchange membranes studied using terahertz spectroscopy”, Proc. SPIE 9747, Terahertz, RF, Millimeter and Submillimeter-Wave Technology and Applications IX, 97470P, San Francisco, U.S.A (2016).
- Jyotirmayee Dash, Shaumik Ray, Bala Pesala, "Enhancing the low frequency THz resonances (< 1 THz) of organic molecules via electronegative atom substitution", Proc. SPIE 9362, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VIII, San Francisco, U.S.A, 93620G (2015).
- Shaumik Ray, Jyotirmayee Dash, Nirmala Devi, Saptarshi Sasmal, Bala Pesala, " Hydration kinetics of cement composites with varying water-cement ratio using terahertz spectroscopy", Proc. SPIE 9362, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VIII, 936211, San Francisco, U.S.A (2015).
- Rahul Kumar, Ankit Arora, Shaumik Ray, Bala Pesala, Enakshi Bhattacharya, Ananth Krishnan, "Observation and Phenomenological Interpretation of Shifts in Electrical Resonance of Square Shaped Planar THz Split Ring Resonators", PIERS Proceedings (2014).
- Bala Pesala, Mridula Madhusudhan, "Novel diffraction properties of high-contrast gratings", Proceedings of SPIE 8633, High Contrast Metastructures II, 86330D, San Francisco, U.S.A (2013).
- Bala Pesala, "High-contrast grating based planar light concentrators", Proceedings of SPIE, High Contrast Metastructures, 82700Q, San Francisco, U.S.A (2012).
- Nirmal Savio Paul, Shiv Ganesh, Jaffer Sheriff, Suriya Prakash J, Gautam Morey, Bala Pesala, "Wearable Device for Non-Invasive Beat-to-Beat Blood Pressure Monitoring using Pulse Transit Time" 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society of the IEEE Engineering in Medicine and Biology Society (EMBC'15) Milano, Italy August 25-29, (2015).
- Ameen E, Bala Pesala, "Self-similar optical properties of fractal high-contrast gratings", SPIE Photonics West International Conference, Sanfrancisco, U.S.A (2015).
- Jyotirmayee Dash, Shaumik Ray, Bala Pesala, "Enhancing the low frequency THz resonances (< 1 THz) of organic molecules via electronegative atom substitution", SPIE Photonics West International Conference, Sanfrancisco, U.S.A (2015).
- Shaumik Ray, Jyotirmayee Dash, Nirmala Devi, Saptarshi Sasmal, Bala Pesala, " Hydration kinetics of cement composites with varying water-cement ratio using terahertz spectroscopy", SPIE Photonics West International Conference, Sanfrancisco, U.S.A (2015).
- Rahul Kumar, Ankit Arora, Shaumik Ray, Bala Pesala, Enakshi Bhattacharya, Ananth Krishnan, "Observation and phenomenological interpretation of shifts in electrical resonance of square shaped planar THz Split Ring Resonators," PIERS 2014, China (August 2014).
- Shaumik Ray, Jyotirmayee Dash, Kathirvel Nallappan, Vaibhav Kaware, Nitin Basutkar, Ashootosh Ambade, Kavita Joshi, Bala Pesala, " Design and Engineering of Organic Molecules for Customizable Terahertz Tags ", SPIE Photonics West, California, U.S.A. (2014).
- Jyotirmayee Dash, Shaumik Ray, Kathirvel Nallappan, Saptarshi Sasmal, Bala Pesala, " Terahertz Spectroscopy of Concrete for Evaluating the Critical Hydration Level ", SPIE Photonics West, California, U.S.A. (2014).
- Shaumik Ray, Jyotirmayee Dash, Kathirvel Nallappan, Ashootosh Ambade, Kavita Joshi, Vaibhav Kaware, Bala Pesala, "Terahertz Spectroscopy of Cyanobenzaldehyde Isomers", IRMMW-THz 2013 Conference, Germany (2013).
- Shaumik Ray, Jyotirmayee Dash, Kathirvel Nallappan, S. Meenakshi, Santoshkumar D. Bhat, Bala Pesala, " Comparitive Study of Water Absorption and Retention of Nafion and its Hybrid Polymer Electrolytic Membranes using Terahertz Spectroscopy", IRMMW-THz 2013 Conference, Germany (2013).
- Jyotirmayee Dash, Shaumik Ray, Kathirvel Nallappan, Saptarshi Sasmal, Bala Pesala, " Non-Destructive Inspection of Internal Defects in Concrete using Continuous Wave 2D Terahertz Imaging System", IRMMW-THz 2013 Conference, Germany (2013).
- Kathirvel Nallappan, Jyotirmayee Dash, Shaumik Ray, Bala Pesala, "Identification of Adulterants in Turmeric Powder using Terahertz Spectroscopy", IRMMW-THz 2013 Conference, Germany (2013).
- Vishnu R. Unni, Yogesh Prasaad M. S., N. T. Ravi, S.Md. Iqbal, Bala Pesala, R. I. Sujith, “Experimental investigation of bifurcations in a thermoacoustic engine”, International Summer School and Workshop on Non-Normal and Nonlinear Effects in Aero and Thermoacoustics, June 18-21, 2013, Munich, Germany.
- Bala Pesala, Harsha Gavarna, Ashwani Kumar, C Kumaravelu, Vinod Scaria, Sridhar Sivasubbu, " Non-invasive detection of mycobacterium tuberculosis using IR and NIR spectroscopy, (IRMMW-THz), Australia, (2012).
- Bala Pesala, "Planar Solar Concentrators using Subwavelength Gratings", Frontiers in Optics, Sanfrancisco, U.S.A, (2011).
- Bala Pesala, Vadim Karagodsky, Connie J. Chang-Hasnain, “Ultra-compact Optical Coupler and Splitter using High-Contrast Grating Hollow-Core Waveguide”, Integrated Photonics Research (IPR 2010), Monterey, CA, U.S.A.
- Vadim Karagodsky, Bala Pesala, Christopher Chase, Werner Hofmann, Fumio Koyama, Connie J. Chang-Hasnain, “Multiwavelength High Contrast Grating VCSEL Array With 200nm Spectral Range”, Conference on Laser and Electro-optics (CLEO 2010), San Jose, California, U.S.A.
- Ayumi Fuchida, Bala Pesala, Vadim Karagodsky, Forrest G. Sedgwick, Fumio Koyama, Connie J. Chang-Hasnain, “Zero-Dispersion Slow Light in Hollow Waveguide with High-Contrast Grating”, Conference on Laser and Electro-optics (CLEO 2010), San Jose, California, U.S.A.
- Bala Pesala, Vadim Karagodsky, Fumio Koyama and Connie Chang-Hasnain, “Novel 2D high-contrast grating”, Conference on Lasers and Electro-optics (CLEO), Baltimore, MD, May 31– June 5 2009.
- Bala Pesala, Forrest G. Sedgwick, Alexander Uskov and Connie Chang-Hasnain, “Theoretical and experimental study of chirped-pulse slow and fast light using semiconductor optical amplifiers”, International Nano-Optoelectronics Workshop, Tokyo, Japan, August 2008.
- A. Matsudaira, D. Nielsen, Bala Pesala, F. G. Sedgwick, C. J. Chang-Hasnain, S. L. Chuang, “Multiple-Bits slow light by cascading semiconductor optical amplifiers in a loop configuration”, International Nano-Optoelectronics Workshop, Tokyo, Japan, August 2008.
- Bala Pesala, Forrest G. Sedgwick, Alexander Uskov and Connie Chang-Hasnain, “Theory and Experiment of chirped-pulse THz slow and fast light in semiconductor optical amplifiers”, Frontier in Optics (FiO)/Laser Science XXIV (LS) Conference, New York, U.S.A, 19-23 Oct. 2008.
- Bala Pesala, Forrest G. Sedgwick, Waison Ko and Connie Chang-Hasnain, “Electrically tunable fast light of 86fs pulses in Semiconductor Optical Amplifiers”, OSA topical meeting, Boston MA, U.S.A July 2008.
- Forrest G. Sedgwick, Bala Pesala and Connie Chang-Hasnain, “Novel Chirp and compensate scheme to enhance fast light in semiconductor optical amplifier”, OSA topical meeting, Boston MA, U.S.A July 2008.
- F.G. Sedgwick, Bala Pesala and Connie Chang-Hasnain, “Chirped pulse slow and fast light in SOA with record delay-bandwidth product of 10.7”, CLEO, San Jose, CA, May 2008.
- Bala Pesala, Forrest G. Sedgwick, Alexander V. Uskov, and Connie Chang-Hasnain, “Novel chirp-enhanced tunable fast light of ultra-short pulses in semiconductor optical amplifiers”, Optical fiber conference, San Diego, CA, March 2008.
- Bala Pesala, Forrest G. Sedgwick, A.V. Uskov, Connie Chang-Hasnain, “Polarization Dependence of THz Bandwidth Fast Light in Semiconductor Optical Amplifiers”, International Nano-Optoelectronics Workshop, Beijing and Lanzhou, China, 7/29-8/11/07.
- Bala Pesala, Forrest G. Sedgwick, Alexander V. Uskov, Connie Chang-Hasnain, Tony H. Lin, “THz Tunable Slow Light and Fast Light of Ultrashort Pulses in Semiconductor Optical Amplifiers”, OSA topical meeting on Slow and Fast light, Salt Lake City, Utah, 8-11 July 2007.
- Bala Pesala, F.G. Sedgwick and Connie Chang-Hasnain, “Ultra High Bandwidth THz Tunable Delays using Cascaded Semiconductor Optical Amplifiers”, CLEO, Baltimore, MD, 7-11 May 2007.
- Forrest G. Sedgwick, Bala Pesala, Connie Chang-Hasnain, “THz-Bandwidth Fast Light in Semiconductor Optical Amplifiers for Two Pulses in Rapid Succession”, International Nano-Optoelectronics Workshop, Beijing and Lanzhou, China, 7/29-8/11/07.
- Forrest G. Sedgwick, Bala Pesala, Jui-Yen Lin, Connie Chang-Hasnain, Tony H. Lin, “Increase of Fractional Advance in THz-Bandwidth Fast Light by Pulse Chirping in an SOA”, OSA topical meeting on Slow and Fast light, Salt Lake City, Utah, 8-11 July 2007.
- F. G. Sedgwick, Bala Pesala, Jason Lin, Wai Son Ko, Xiaoxue Zhao, and C. J. Chang-Hasnain, “THz Tunable Slow Light in Semiconductor Optical Amplifiers”, Optical Fiber Communications Conference, Anaheim, California, March 25-30 (2007).
- A. V. Uskov, F. G. Sedgwick, B. Pesala, and C. J. Chang-Hasnain, “Ultrafast Nonlinear Group Index in Semiconductor Optical Amplifiers for Slow and Fast Light”, OSA Frontier in Optics Meeting, San Jose, CA, 17-20 September 2007.
- Bala Pesala, Zhangyuan Chen, Alexander V. Uskov, Connie Chang-Hasnain, “Slow and Superluminal light based on Four-Wave Mixing in Semiconductor Optical Amplifiers”, CLEO 2006, Long Beach, CA.
- Bala Pesala, Zhangyuan Chen, Connie Chang-Hasnain, “Tunable pulse delay demonstration using Four-Wave mixing in Semiconductor Optical Amplifiers”, OSA topical meeting, Washington D.C 2006.
- Zhangyuan Chen, Bala Pesala, Connie Chang-Hasnain, “Experimental Demonstration of Slow light via Four-Wave Mixing in Semiconductor Optical Amplifiers”, OFC 2006, CA.
- A. Veerararagavan, P. Bala Subrahmanyam and R. I. Sujith “An Integral Approach to the Modeling of Sound Propagation Through a Finite Combustion Zone”, 43rd Aerospace Sciences Meeting and Exhibit, AIAA Paper Number 2006-0542, Reno, Nevada, (2006).
- Xiaoxue Zhao, Phedon Palinginis, Bala Pesala, Philip Hemmer and Connie J. Chang-Hasnain, “Room-Temperature Tunable Ultraslow Light in 1550 nm VCSEL Amplifier,” post-deadline ECOC 2005.
- Bala Pesala, Lukas Chrowstowski, Wendy Zhao, C.J.Chang Hasnain “Feedback Tolerance of Injection Locked VCSELS”, CLEO, Baltimore May 22 2005.
- Michael C.Y. Huang, Ye Zhou, Bala Pesala, Connie J. Chang-Hasnain, “ Novel Piezoelectrically Actuated MEMS tunable VCSEL” CLEO, Baltimore May 22 2005.
- V. Aga, Bala Pesala, R.I. Sujith “Particle Dispersion in a Double Frequency Forced Shear Layer” X Asian Congress of Fluid Mechanics, Peradeniya, Sri Lanka, May 2004.
- P. Bala Subrahmanyam, Y. Zhou, L. Chrowstowski, C.J. Chang Hasnain “VCSEL tolerance to feedback for Inter-chip optical interconnects”, ISLC Conference, Japan, September 2004.
- P. Bala Subrahmanyam, R. I. Sujith and M. Ramakrishna, “Determination of Unsteady Heat Release Distribution from Acoustic Pressure Measurements”, AIAA/ASME Joint Propulsion Conference, Huntsville, Alabama, USA, July 2003.
- P. Bala Subrahmanyam, R. I. Sujith and T. Lieuwen, AIAA 01-1102 38th AIAA Aerospace Sciences Meeting and Exhibit, January 8-11, Reno, NV, USA. "Propagation of Sound in Inhomogeneous Media: Exact, Transient Solutions in Cartesian and Curvilinear Geometries", 2001.
- Solar Tree Orientations," 6th International Conference On Advances In Energy Research, IIT Bombay, 2017.
- International Conference On Advances In Energy Research, IIT Bombay, 2017.
- M V N Surendra Gupta, Ameen E, Bala Pesala,"SiO2 Grating Based Photonic Structures as Ideal Narrow Band Emitter for Solar Thermophotovoltaics Application," 6th International Conference On Advances In Energy Research, IIT Bombay, 2017.
- Ameen E, Kiran Vaddi, Srinivas Reddy, Bala Pesala," Reduction of Escape Cone Losses in Luminescent Solar Concentrators using High Contrast Gratings, 6th International Conference On Advances In Energy Research, IIT Bombay, 2017.
- Chandan, Bala Pesala," Floating Absorber Integrated with Compound Parabolic Concentrator for Effective Solar Water Desalination," 6th International Conference On Advances In Energy Research, IIT Bombay, 2017.
- Sreeja S, Bala Pesala," Efficiency Enhancement of Betanin Dye Sensitized Solar Cells using Plasmon Enhanced Silver Nanoparticles," 6th International Conference On Advances In Energy Research, IIT Bombay, 2017.
- Nirmala Devi, Jyotirmayee Dash, Shaumik Ray, Bala Pesala," Non-invasive characterization of carbon fiber reinforced polymer composites using continuous wave terahertz system," Trends in Industrial Measurement and Automation (TIMA), 2017.
- Shaumik Ray, Nirmala Devi, Jyotirmayee Dash, Saptarshi Sasmal, Bala Pesala, " Effect of Nano-silica Incorporation on Cement Hydration Dynamics Studied using Terahertz Spectroscopy," Photonics, IIT Kanpur, 2016.
- Ameen E, M V N Surendra Gupta,Mani R, Bala Pesala," Asymmetric Diffraction Gratings for Color Shifting Structures," Photonics, IIT Kanpur 2016.
- . Mallikarjun Bhavanari, Ameen E, Ananthanarayanan Veeraragavan, Bala Pesala,“Grating Based Photonic Structures For Thermo-Photovoltaic Applications” 1st International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC2015) 17-20 Dec 2015 ISRO – Thiruvananthapuram, India.
- Bhavanari Mallikarjun, Ameen E, Bala Pesala,“Hybrid SiO2-Si Dielectric Gratings on an Aluminium Substrate for Color Shifting Applications”IISC Bangalore,IEEE WRAP (2015).
- Jyotirmayee Dash, Shaumik Ray, Vaibhav Kaware, Nitin Basutkar, Ashootosh Ambade, Kavita Joshi, Bala Pesala, ‘Terahertz Resonances of Di(pyridin-2-yl)amine: A Detailed Experimental and Computational study’, Photonics 2014 – The International Conference on Fiber Optics and Photonics, Optical Society of America (OSA), Kharagpur, India.
- Sudhir Kumar Saini, Ameen E, Rahul Raj, Pankaj B. Agarwal, Bala Pesala & Ajay Agarwal, "1D Colour Shifting Properties of Gold Grating Fabricated Using Dip Pen Nanolithography," Photonics 2014, IIT Kharagpur, India.
- V. P. Anand, E. Ameen and Bala Pesala, “Experimental Investigation of the Shading losses on Solar Module System Performance”, International Conference on Advances in Electrical Engineering, Vellore, 09th to 11th Jan, 2014.
- V. P. Anand, Mohd. Meraj Khan, E. Ameen, Vijay Amuthan and Bala Pesala, “Performance Improvement of Solar Module System using Flat Plate Reflectors”, International Conference on Advances in Electrical Engineering, Vellore, 09th to 11th Jan, 2014.
- V. P. Anand, O. B. Priyan and Bala Pesala , “Effect of Shading Losses on the Performance of Solar Module System using MATLAB Simulation”, 2 nd International Conference on Electrical Energy Systems, Chennai, Jan, 2014.
- Harshal Agarwal, K. T. Akhil, R. Unni, Vishnu, N. T. Ravi, R. I. Sujith, S. Md Iqbal and Bala Pesala, “Performance Optimization of Tunable Standing Wave Thermoacoustic Engine by Varying the Stack Parameters and Resonator Length: An Experimental Study ”, International Conference on Advances in Electrical Engineering, Vellore, 09th to 11th Jan, 2014.
- Vijay, S.V.R.K., Lella, A.V. ; Paul, N.S. ; Prakash, J.S. ; Venkatraman, V. ; Morey, G. ; Pesala, B. “Classification of data obtained from portable ECG devices using support vector machines” International Conference on Advanced Electronic Systems (ICAES), 2013. Digital Object Identifier: 10.1109/ICAES.2013.6659399, 235 - 237, 2013.
- Vishnu R. Unni, Yogesh Prasaad M. S., N. T. Ravi, S. Md. Iqbal, Bala Pesala, R. I. Sujith, “Thermoacoustic Power Generator: Compact Solar Thermal Solution for Decentralized Applications”, 1st TAPSUN Conference, December 4-5, 2012, New Delhi, India.
- Kathirvel Nallappan, Shaumik Ray, Jyotirmayee Dash, Bala Pesala, " Non-Intrusive Detection of Hidden Metallic Objects Inside an envelope Using Terahertz Imaging " - NCRASPC-2013, National Conference on Recent Advancements in Signal Processing and Communications, India.
- Bala Pesala, Vadim Karagodsky and Connie Chang-Hasnain, “Ultra-compact low loss photonic components using high-contrast gratings”, International Conference on Optics and Photonics (ICOP), Chandigarh, India, Oct.30-Nov.1, 2009.
- P. Bala Subrahmanyam and R. I. Sujith, “Exact Harmonic Solutions for Acoustic Fields in Variable Area Ducts and Curvilinear Geometries”, 8th Technical Session of the Madras-India Regional Chapter of the Acoustical Society of America, 29th and 30th September 2002.
Patents, Technology Transfer etc
Granted (U.S Patents)
- Bala Pesala, “Planar solar concentrators using subwavelength grating and a process thereof”, WO2013005231A2 (2016).
- Bala Pesala, Mridula Madhusudhan, “Method to design a security feature on the substrate of security documents using sub wavelength grating”, US9221293 B2 (2015).
Filed (PCT)
- Ashootosh Vasant Ambade, Bala Pesala, Kavita Joshi," Organic molecules for terahertz tagging applications," WO2015104722 A1 (2015).
Technology Transfer
- Mathematical model for fatigue detection: Transferred to M/s. Tereso Ventures Pvt. Ltd.