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Recorded Interviews & Discussions

Essays and other writings

Talks, Workshops, Lectures and Poster presentations

List of (some) Papers

Authors Title Journal Ref
2021.3 C. Roychoudhuri Optics professionals, get involved in fundamental physics, both in teaching and in research ETOP Conf. Managed by OSA: Th3A.5. September 9, 2021
210429 C. Roychoudhuri Cosmic Ether, Possessing Electric-Tension and Magnetic-Resistance, Is the Unified Field for Physics Journal of Modern Physics, 2021, 12, 671-699
2020.2 C. Roychoudhuri Complete Information Retrieval: A Fundamental Challenge FQXi Essay Contest Entry
2020.1 Roychoudhuri, C.; Fernando, G.; Tirfessa, N.; Prasad, N. Contrasting quantum sensing light source properties, which generate different photocurrent pulse-statistics Proc. SPIE 11288, Quantum Sensing and Nano Electronics and Photonics XVII, 112880F (31 January 2020); doi: 10.1117/12.2551090
2019.6 C. Roychoudhuri Differentiating the Superposition Principle from the Measurable Superposition Effects in Interferometry Chapter in Interferometry
2019.4 C. Roychoudhuri Developing causal interpretations for high and low level light used in quantum remote sensing Proc. SPIE 11128, Infrared Remote Sensing and Instrumentation XXVII, 111280M (9 September 2019); doi:10.1117/12.2533994
2019.3 C. Roychoudhuri; N. Tirfessa Bringing reality in physics: System engineering approach to optical phenomena following Huygens' Principle Proc. SPIE 11143, Fifteenth Conference on Education and Training in Optics and Photonics: ETOP 2019, 111433A (2 July 2019); doi:10.1117/12.2523602
2019.2 N. Tirfessa;C. Roychoudhuri Similarities and differences in microwave and optical radiation detection Proc. SPIE 11143, Fifteenth Conference on Education and Training in Optics and Photonics: ETOP 2019, 111433W (2 July 2019); doi: 10.1117/12.2525442
2019.1 C. Roychoudhuri; N. Prasad Complex interaction processes we need to visualize that successfully fill the quantum cup of a detector Proc. SPIE 10926, Quantum Sensing and Nano Electronics and Photonics XVI (22 March 2019); doi:10.1117/12.2514835
2018.1 C. Roychoudhuri The concept of "fundamental" must keep evolving FQXi Essay Contest Entry
2018.2 C. Roychoudhuri; N. Prasad Short pulse characterization requires recognizing inseparability of auto- correlation and spectral measurements Proc. SPIE 10522, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVIII, 105221N (19 February 2018); doi: 10.1117/12.2295832
2018.3 C. Roychoudhuri What are the physical processes behind the evolution of spatial coherence out of incoherent light and particle beams? Laser Science 2018 - Washington, DC United States - 16-20 September 2018
2017.4 C. Roychoudhuri Re-energizing Enquiry among our young professionals 2017 ETOP Conference; Paper # ETP 100-43
2017.3 C. Roychoudhuri Consequences of repeated discovery and benign neglect of Non-Interaction of Waves (NIW) 2017 ETOP Conference; Paper # ETP 100-36
2017.2 C. Roychoudhuri Demonstration & implications when 50% beam combiners can behave as 0% or 100% reflector/transmitter inside some interferometers 2017 ETOP Conference; Paper # ETP 100-83
2017.1 C. Roychoudhuri Empower Mathematical Equations Using Evolution Process Congruent Thinking 2017 FQXi Essay Contest Entry
2016.x C. Roychoudhuri Aquaponics as a small eco system: A potential tool in every family to educate the children to become eco-savvy IIT Bombay Heritage Foundation & IIT Bombay Alumni Association Kolkata Chapter
2015.6 C. Roychoudhuri Urgency of evolution process congruent thinking in physics Proc. SPIE Vol. 9570-7(2015)
2015.5 C. Roychoudhuri; M. Ambroselli Could space be considered as the inertial rest frame? Proc. SPIE Vol. 9570-30(2015)
2015.4 M. Ambroselli;C. Roychoudhuri Did Planck, Einstein, Bose count indivisible photons, or discrete emission / absorption processes in a black-body cavity? Proc. SPIE Vol. 9570-9(2015)
2015.3 C. Roychoudhuri; M. Ambroselli Modelling superposition of 3- & N-polarized beams on an isotropic photo detector Proc. SPIE Vol. 9570-46(2015)
2015.2 N. Prasad;C. Roychoudhuri Tabletop demonstration of Non-Interaction of Photons and Non-Interaction of Waves Proc. SPIE Vol. 9570-47(2015)
2015.1 C. Roychoudhuri "Review of: ""Light: The Physics of Photons"" by Ole Keller, CRC Press, Boca Raton, Fl. 2014" Am. J. Phys. 83 (3), pp.286-7, March 2015
2014.3 C. Roychoudhuri "Superposition Effect is a ""local"" phenomenon when we investigate the process behind release of photo electrons" Latin America Optics and Photonics Conference, 2014
2014.2 C. Roychoudhuri Causal Physics - Photon Model by Non-Interaction of Waves - Ch. 12: Evolving Scientific Inquiry CRC/Taylor and Francis, 2014
2013.1 N. Prasad;C. Roychoudhuri Does the Coherent Lidar System Corroborate Non-Interaction of Waves (NIW)? Proc. SPIE Vol. 8832-8(2013)
2013.2 N. Prasad;C. Roychoudhuri Understanding beam alignment in a coherent lidar system Proc. SPIE Vol. 8832-9(2013)
2013.3 C. Roychoudhuri How would photons describe natural phenomena based upon their physical experiences? Proc. SPIE Vol. 8832-34(2013)
2013.4 C. Roychoudhuri;M. Ambroselli Can one distinguish between Doppler shifts due to source-only and detector-only velocities? Proc. SPIE Vol. 8832-2(2013)
2013.5 C. Roychoudhuri "Tribute to H. John Caulfield - Hijacking the ""Holographic Principle"" by cosmologists" Proc. SPIE Vol. 8833-15(2013)
2012.1 C. Roychoudhuri;N. Prasad Discerning comb and Fourier mean frequency from a fs laser, based on the principle of non-interaction of waves Proc. SPIE Vol. 8236, paper #16 (2012).
2012.2 C. Roychoudhuri Next Frontier in Physics - Space as a Complex Tension Field Journal of Modern Physics, 2012, 3, 1357-1368
2011.1 C. Roychoudhuri;M. Barootkoob;M. Ambroselli The constancy of c everywhere requires the cosmic space to be a stationary and complex tension field SPIE Conf. Proc. Vol.8121-23 (2011).
2011.2 C. Roychoudhuri Appreciation of the nature of light demands enhancement over the prevailing scientific epistemology in this volume; Proc. SPIE Vol.8121- 58 (2011).
2011.3 N. Tirfessa;C. Roychoudhuri Analysis of spectrometric data and detection processes corroborate photons as diffractively evolving wave packets Proc. SPIE Vol.8121-33 (2011).
2011.4 C. Roychoudhuri Re-interpreting coherence in light of Non-Interaction of Waves, or the NIW-Principle SPIE Conf. Proc. Vol.8121-44 (2011).
2011.5 M. Ambroselli;C. Roychoudhuri Visualizing superposition process and appreciating the principle of Non-Interaction of Waves Proc. SPIE Vol. 8121-49 (2011).
2011.6 M. Ambroselli;P. Poulos;C. Roychoudhuri Nature of EM waves as observed & reported by detectors for radio, visible and gamma frequencies Proc. SPIE Vol.8121-41 (2011).
2011.8 C. Roychoudhuri Exploring light-matter interaction processes to appreciate various successes behind the Fourier theorem! A tribute conf. to Joseph Goodman. SPIE Proc. Vol.8122-15 (2011).
2010.1 C. Roychoudhuri Principle of non-interaction of waves J. Nanophotonics., Vol. 4, 043512 (2010); doi:10.1117/1.3467504.
2010.3 C. Roychoudhuri Various Ambiguities in Generating and Reconstructing Laser Pulse Parameters Ch.7 in Laser Pulse Phenomena and Applications; Ed. F. J. Duarte; InTech (2010).
2009.1 C. Roychoudhuri The consilient epistemology: structuring evolution of logical thinking Chap. 16 in Proc. 1st Interdisciplinary CHESS Interactions Conf., Eds. C. Rangacharyulu and E. Haven; Imperial College Press, London (2009).
2009.3 C. Roychoudhuri Why we need to continue the 'What is a Photon?' conference: to re-vitalize classical and quantum optics keynote presentation; SPIE Conf. Proc. Vol. 7421-28 (2009).
2009.4 C. Roychoudhuri Comments on the panel discussions: Is indivisible single photon really essential for quantum communications, computing and encryption? SPIE Conf. Proc. Vol. 7421(2009).
2009.5 A. Muthukrishnan;C. Roychoudhuri Indivisibility of the Photon. SPIE Proc. Vol. 7421-4 (2009).
2009.7 Q. Peng;M. Barootkoob;C. Roychoudhuri What can we learn by differentiating between the physical processes behind interference and diffraction phenomena? SPIE Proc. Vol. 7421-9 (2009).
2008.2 C. Roychoudhuri Inevitable incompleteness of all theories: an epistemology to continuously refine human logics towards cosmic logics Ch.6 in The Nature of Light: What is a Photon? by C. Roychoudhuri, A. F. Kracklauer & Kathy Creath; CRC/Taylor & Francis (2008).
2008.3 C. Roychoudhuri Can photo sensors help us understand the intrinsic difference between quantum and classical statistical behavior? AIP Conf. Proc. Vol.1101, pp. 167-177 (2009); Fifth Conf. on Foundations of Probability & Physics; Sweden, Aug.24-27, 2008.
2008.4 C. Roychoudhuri What is Coherence Proceedings of International Photonics Conference, New Delhi, India, December, 2008; Invited Talk.
2008.5 C. Roychoudhuri;M. Barootkoob Generalized quantitative approach to two-beam fringe visibility (coherence) with different polarizations and frequencies SPIE Conf. Proc. Vol. 7063, paper #4 (2008).
2007.4 C. Roychoudhuri Shall we climb on the shoulders of the giants to extend the reality horizon of physics? Conf. on Quantum Theory: Reconstruction of Foundations - 4; Invited paper; AIP Conf. Proc. Vol.962 (2007).
2007.5 C. Roychoudhuri Bi-centenary of successes of Fourier theorem! Its power and limitations in optical system designs Invited paper; SPIE Conf. Proc. Vol. 6667-18 (2007).
2007.6 C. Roychoudhuri Can the hypothesis 'photon interferes only with itself' be reconciled with superposition of light from multiple beams or sources? doi: 10.1117/12.734363; SPIE. Proc. Vol.6664 (2007).
2007.7 C. Roychoudhuri Can a deeper understanding of the measured behavior of light remove wave-particle duality? doi: 10.1117/12.740189; SPIE. Proc. Vol.6664 (2007).
2007.8 C. Roychoudhuri;P. Poulos Can we get any better information about the nature of light by comparing radio and light wave detection processes? doi: 10.1117/12.740177; SPIE. Proc. Vol.6664 (2007).
2007.9 C. Roychoudhuri;N. Tirfessa;C. Kelley;R. Crudo If EM fields do not operate on each other, why do we need many modes and large gain bandwidth to generate short pulses? SPIE Proc. Vol.6468-53 (2007).
2007.1 C. Roychoudhuri The nature of light: what are photons? SPIE News on Web, January 4 (2007).
2007.11 C. Roychoudhuri A deeper look at the fundamentals of heterodyne detection requirements 14th Coherent Laser Radar Conference
2006.1 C. Roychoudhuri Locality of superposition principle is dictated by detection processes Phys. Essays 19 (3), September (2006).
2006.2 C. Roychoudhuri;M. Tayahi Spectral Super-Resolution by Understanding Superposition Principle & Detection Processes Intern. J. of Microwave and Optics Tech., July (2006).
2006.3 C. Roychoudhuri;N. Prasad proceedings of the October, 2006 IEEE-LEOS Annual Conference, Montreal, Canada; Invited Talk.
2006.4 C. Roychoudhuri;N. Tirfessa Various ambiguities in re-constructing laser pulse parameters Proc. SPIE Vol.6372-29 (2006), Do we count indivisible photons or discrete quantum events experienced by detectors?
2006.5 C. Roychoudhuri;D. Lee;P. Poulos If EM fields do not operate on each other, how do we generate and manipulate laser pulses? Proc. SPIE Vol.6290-02 (2006);
2006.6 C. Roychoudhuri;C. V. Seaver Proc. SPIE Vol. 6285-01, Invited, (2006) in The nature of light: Light in nature;
2006.7 C. Roychoudhuri;N. Tirfessa Are dark fringe locations devoid of energy of superposed fields? Proc. SPIE Vol.6292-01, Invited (2006); A critical look at the source characteristics used for time varying fringe interferometry.
2006.8 C.Roychoudhuri;V. Lakshminarayanan Role of the retinal detector array in perceiving the superposition effects of light Proc. SPIE Vol.6285-08 (2006) in The nature of light: Light in nature;
2006.9 C. Roychoudhuri Reality of superposition principle and autocorrelation function for short pulses Proc. SPIE Vol. 6108-50(2006).
2005.2 C. Roychoudhuri If superposed light beams do not re-distribute each other's energy in the absence of detectors (material dipoles), can an indivisible single photon interfere by/with itself? Proc. SPIE Vol.5866-05, pp.26-35 (2005).
2005.3 C. Roychoudhuri What are the processes behind energy re-direction and re-distribution in interference and diffraction? Proc. SPIE Vol.5866-16, pp.135-146(2005);
2004.1 C. Roychoudhuri Propagating Fourier frequencies vs. carrier frequency of a pulse through spectrometers and other media in Interferometry-XII: Techniques and Analysis; Proc. SPIE Vol.5531, 450-461(2004).
2003.1 D. Lee;C. Roychoudhuri Measuring properties of superposed light beams carrying different frequencies Optics Express 11(8), 944-51, (2003).
2003.2 D. Young;C. Roychoudhuri Results and comparison of a cladding pumped fiber simulation using a decagon-shaped fiber Optics Express, 11 (7), 830-837 (2003)
2003.3 C. Roychoudhuri;R. Roy The Nature of Light: What is a Photon? Optics & Photonics News Trends, Special issue of OPN, October (2003).
2003.4 C. Roychoudhuri;D. Lee;Y. Jiang;S. Kittaka;M. Nara;V. Serikov;M. Oikawa Limits of DWDM with gratings and Fabry-Perot's and alternate solutions Invited talk; Proc. SPIE Vol.5246, 333-344, (2003).
2003.5 C. Roychoudhuri;M. Nantel The Global Photonics Education Network: Another Way to Think Globally and Act Locally SPIE Conf.Proc. ETOP-2003, paper # EME 6 (2003).
2002.1 O. V. Smolski;J. Jiang;C. Roychoudhuri;E. L. Portnoi;J. Bullington Tunable pico second pulses from gain-switched grating coupled surface emitting lasers Proc. SPIE Vol.4651, paper # 09, (2002).
1998.1 J. Anderson and C. Roychoudhuri, Diffraction of an Extremely Short Optical Pulse , J. Opt. Soc. Am., 15 (2), 456-463(1998).
1989.1 F. X. D'Amato, E. T. Siebart & C. Roychoudhuri; Coherent Operation of an Array of Diode Lasers Using a Spatial Filter in a Talbot Cavity ; Appl. Phys. Lets. 55 (9), 816-818 (1989).
1979.2 G. L. Clark & C. Roychoudhuri; Interferometry through single mode optical fiber ; Proc. SPIE Vol.192, 196 (1979).
1977.1 C. Roychoudhuri & S. Calixto; Spectroscopy of Short Pulses ; Boletin. Inst. Tonantzintla, 2(3), 187 (1977).
1977.2 C. Roychoudhuri, Causality and Classical Interference and Diffraction Phenomena ; Boletin. Inst. Tonantzintla, 2(3), 165 (1977).
1976.3 C. Roychoudhuri; Is Fourier Decomposition Interpretation Applicable to Interference Spectroscopy? Bol. Inst. Tonantzintla 2(2), 101 (1976).
1976.4 C. Roychoudhuri, R. Machorro & M. Cervantes; Some Interference Experiments and Quantum Concepts, II ; Bol. Inst. Tonantzintla 2(1), 55 (1976).
1975.1 C. Roychoudhuri; Response of Fabry-Perot Interferometers to Light Pulses of Very Short Duration . (The analysis of this paper is followed and cited in two books: (i) Fabry-Perot Interferometers by G. Hernandez, Cambridge U., 1986 and (ii) The Fabry-Perot Interferometer by J. M. Vaughan; Adam Hilger, 1989.); J. Opt. Soc. Am.; 65(12), 1418 (1975).
1975.4 C. Roychoudhuri; Demonstration Using a Fabry-Perot. I. Multiple-Slit Interference ; Am. J. Phys. 43(12), 1054 (1975).
1975-7 C. Roychoudhuri Two Beam Interference Experiments and some Quantum Concepts Boletin Del Instituto De Tanantzintla, Vol. 1, No. 5, 1975