Journal (SCI) Publications

• Pranjal Choudhury and Bosanta R. Boruah, " Adaptive image thresholding and localization of point spread functions with enhanced precision for single molecule localization based super-resolution microscopy ", Optics and Lasers in Engineering (Elsevier) : Accepted for publication, (2024)
• Shilpa Singh and Bosanta R. Boruah, " Beam manipulation and force estimation in dynamic holographic optical tweezers ", Journal of Optics (Springer) : Accepted for publication, (2024)
• Pranjal Choudhury and Bosanta R. Boruah, " Localization and Image Reconstruction in a STORM Based Super-resolution Microscope ", IPOL - Image Processing on Line : 14, 64(2024)
• Anupam Bharadwaj, Ranjan Kalita, Amalesh Kumar, Anupam Sarma, Bithiah G Jaganathan, Sunil Kumar, Frederik Gorlitz, Jonathan Lightley, Chris Dunsby, Mark Neil, Callum Hollick, Jeremy Graham, P M W French, and Bosanta R Boruah, " A cost-effective, modular, research-grade optical microscope ", Current Science (Indian Academy of Sciences) : 126,2 (2024)
• Akanshu Chauhan, Nedup Sherpa and Bosanta R. Boruah, " Prediction of effective size of a propagated laser beam with a known phase profile and its experimental validation ", Optik (Elsevier): 296, (February 2024) 171571(2023)
• Nedup Sherpa, Anupam Bharadwaj, Nagendra Kumar, Akanshu Chauhan and Bosanta R. Boruah, " Synchronization and clock recovery in a ferroelectric liquid crystal spatial light modulator based free-space optical communication link", Review of Scientific Instruments: 94, 053002 (2023)
• Akanshu Chauhan and Bosanta R. Boruah, " A study on the orthogonality property of Zernike modes in light beams undergoing free space propagation", JOSA A: 40(5), 961 (2023)
• Nagendra Kumar, Biswajit Pathak, Rahul Kesarwani, Sumit Goswami, Alika Khare and Bosanta R. Boruah, "Experimental demonstration of in-situ surface and thickness profile measurement of thin film during deposition using a grating array based wavefront sensor", Optics Letters: 47(21), 5509 (2022)
Karuna S Malik and Bosanta R. Boruah, "Optical force calculation in the ray-optics regime for beam with arbitrary complex amplitude profiles ", Optics Letters: 47 (16) 4151 (2022)
• Karuna S Malik, Nagendra Kumar and Bosanta R. Boruah, "Dynamic modulation of spatial intensity profile of a laser beam using a binary hologram ", Optics Communications: 515 , 128201 (2022)
• Akanshu Chauhan, Nedup Sherpa and Bosanta R. Boruah, "Diffraction-induced divergence of propagating Zernike mode aberrations ", JOSA A: 39 (3), 306-313 (2022)
• Karuna S Malik and Bosanta R. Boruah, "Optimal trap velocity in a dynamic holographic optical trap using a nematic liquid crystal spatial light modulator ", Journal of Optics (IOP) : 24 (3), 034004 (2022)
• Nagendra Kumar, Alika Khare and Bosanta R. Boruah, "Enhancement of wavefront measurement sensitivity in a zonal wavefront sensor without curtailing the sensing speed ", Journal of Optics (IOP): 24 (1), 014003 (2022), (Published on 16 Dec 2021)
• Santanu Konwar, and Bosanta R. Boruah, "Leveraging the orthogonality of Zernike modes for robust free-space optical communication ", Communications Physics (Nature): 3 203(2020)
• Satya S Goutam Buddha, and Bosanta R. Boruah, " Estimation of point spread function of an optical microscope using stochastic minimization of least square errors ", Journal of Optics (IOP): 22 (5), 055603 (2020)
• Satya S Goutam Buddha, Ranjan Kalita and Bosanta R. Boruah, " Array detection in a holographic scanning microscope ", Optics Communications: 462 , 125339 (2020)
• Ranjan Kalita, A. Saikia, A. C. Bhuyan and Bosanta R. Boruah, " Holographic scanning confocal microscopy for both reflected light and fluorescence light imaging ", Review of Scientific Instruments: 90(10), 106103 (2019)
• Santanu Konwar, and Bosanta R. Boruah, "Improved linear response in a modal wavefront sensor ", JOSA A: 36 (5), 741-750 (2019)
• Ranjan Kalita, Satya S Goutam Buddha and Bosanta R. Boruah, "A laser scanning microscope executing intraframe polarization switching of the illumination beam ", Review of Scientific Instruments: 89(9), 093705 (2018)
• Santanu Konwar, and Bosanta R. Boruah, "Estimation of inter-modal cross talk in a modal wavefront sensor ", OSA Continuum: 1(1), 78-91 (2018)
• Biswajit Pathak and Bosanta R. Boruah, "A zonal wavefront sensor with multiple detector planes ", Journal of Optics (IOP): 20(3) 035604 (2018)
• Biswajit Pathak and Bosanta R. Boruah, "Improvement in Error Propagation in the Shack-Hartmann type Zonal Wavefront Sensors ", JOSA A : 34(12), 2194-2202 (2017)
• Santanu Konwar, and Bosanta R. Boruah, "Current induced fluctuations in the orientation of the beam diffracted by a Liquid Crystal Spatial Light Modulator ", Review of Scientific Instruments: 88(6), 066104 (2017)
• Biswajit Pathak, and Bosanta R. Boruah, "Zonal Wavefront Sensing with Enhanced Spatial Resolution ", Optics Letters : 41(23), 5600-5603 (2016)
• Md. Gaffar, Ranjan Kalita, and Bosanta R. Boruah, "Experimental observation of the aberration effects on a radially polarized beam ", JOSA A : 33(11), 2178-2187 (2016)
• Md. Gaffar, Ranjan Kalita, and Bosanta R. Boruah, "Experimental demonstration of a light beam with superior aberration resilience ", Optics Letters : 41(19), 4425-4428 (2016)
• Ranjan Kalita, Md. Gaffar, and Bosanta R. Boruah, "Generation of arbitrary vector beams using a division of wavefront based setup ", Journal of Optics (IOP): 18(7) 075604 (2016)
• Biswajit Pathak, Suraj Kumar, and Bosanta R. Boruah, "Zonal wavefront sensing using a grating array printed on a polyester film ", Review of Scientific Instruments: 86 125002 (2015)
• Md. Gaffar and B. R. Boruah, "Poynting vector profile of a tightly focused radially polarized beam in the presence of primary aberrations ", JOSA A: 32 (4), 660-668 (2015)
• Md. Gaffar and B. R. Boruah, "Generation of a boat-shaped beam due to a tightly focused comatically aberrated azimuthally polarized beam ", Journal of Optics (IOP): 16 105709 (2014)
• Biswajit Pathak and B. R. Boruah, "Improved wavefront reconstruction algorithm for Shack--Hartmann type wavefront sensors ", Journal of Optics (IOP): 16 055403(2014) (selected as the Journal of Optics paper of the week during 18-25, April 2014 )
• Abhijit Das and B. R. Boruah, "Laser beam scanning using a ferroelectric liquid crystal spatial light modulator ", Review of Scientific Instruments: 85 046103 (2014)
• Dhirendra Kumar, Abhijit Das and B. R. Boruah, " A simple experimental arrangement to generate optical vortex beams ", Review of Scientific Instruments: 84 026103 (2013)
• Abhijit Das and B. R. Boruah, " Beam deflection by an aperiodic binary diffraction grating ", Journal of Optics (IOP) : 15(025709) (2013)
• B. R. Boruah, " Axial separation of orthogonally polarized focal field components due to a radially polarized beam ", JOSA A : 29(7) 1269-1276 (2012)
• B. R. Boruah and Abhijit Das, " A zonal wavefront sensor with reduced number of rows in the detector array ", Applied Optics : 50(20) 3598-3603 (2011)
• B. R. Boruah, G. D. Love and M. A. A. Neil, " Interferometry using binary holograms without high order diffraction effects ", Optics Letters : 36(12) 2357-2359 (2011)
• Abhijit Das and B. R. Boruah, " Optical sectioning microscope with a binary hologram based beam scanning", Review of Scientific Instruments : 82 043702 (2011)
• B. R. Boruah, "Lateral resolution enhancement in confocal microscopy by vectorial aperture engineering ", Applied Optics: 49 701-707 (2010) (also appeared in the Virtual Journal for Biomedical Optics, Vol.5, issue 4).
• B. R. Boruah, "Zonal wavefront sensing using an array of gratings ", Optics Letters: 35 202-204 (2010).
• B. R. Boruah and M. A. A. Neil, "Focal field computation of an arbitrarily polarized beam using fast Fourier transforms", Optics Communications: 282 4660-4667 (2009).
• B. R. Boruah, "Dynamic manipulation of a laser beam using a liquid crystal spatial light modulator", American Journal of Physics: 77 331 (2009).
• B. R. Boruah and M. A. A. Neil, "Laser scanning confocal microscope with programmable amplitude, phase, and polarization of the illumination beam", Review of Scientific Instruments: 80 013705 (2009).
• Egidijus Auksorius, Bosanta R. Boruah, Christopher Dunsby, Peter M. P. Lanigan, Gordon Kennedy, Mark A. A. Neil, and Paul M. W. French, "Stimulated emission depletion microscopy with a supercontinuum source and fluorescence lifetime imaging", Optics Letters: 33 113-115 (2008) (also appeared in the Virtual Journal for Biomedical Optics , Vol.3, issue 2).
• B. R. Boruah and M. A. A. Neil, "Susceptibility to and correction of azimuthal aberrations in singular light beams", Optics Express: 14 10377-10385 (2006).
• A G Barua and B R Boruah, " Minerals and functional groups present in Jack fruit seed", International journal of food sciences and nutrition, 55 No 6 (2004).
• A G Barua, B R Boruah, S Bhattacharyya and G D Barua, " Spectroscopic Investigation of Dergaon meteorite", Pramana-journal of Physics, 60 No.1 (2003).

Patents granted

• "A WAVEFRONT MEASURING SYSTEM AND METHOD WITH AMELIORATED DYNAMIC RANGE ", Nagendra Kumar, Alika Khare and B R Boruah, Indian Patent No.: 531526, 02 April 2024
• "A Method and Device for Zonal Wavefront Sensing Via Sequential Spatially Shifted Grating Array Patterns ", Biswajit Pathak and B R Boruah, Indian Patent No.: 510388, 13 February 2024
• "Free space optical communication system apparatus and a method thereof ", Santanu Konwar and B R Boruah, Indian Patent No.: 491998, 29 December 2023
• "Free space optical communication system apparatus and a method thereof ", Santanu Konwar and B R Boruah, Japanese Patent No.: JP,7263453,B, 14 April 2023
• "Free space optical communication system apparatus and a method thereof ", Santanu Konwar and B R Boruah, Korean Patent No.: 10-2483858, 28 December 2022
• "System, apparatus and method for monitoring of surface profile and thickness measurement in thin films ", Biswajit Pathak, Rahul Kesarwani, Alika Khare and B R Boruah, European Patent : EP3387482, 16 November 2022
• "A METHOD AND DEVICE FOR ZONAL WAVEFRONT SENSING BY BEAM SPLITTING ", Biswajit Pathak and B R Boruah, Indian Patent Number 406347 12 September 2022
• "System, apparatus and method for monitoring of surface profile and thickness measurement in thin films ", Biswajit Pathak, Rahul Kesarwani, Alika Khare and B R Boruah, Indian Patent Number 403113, 05 August 2022
• "Free space optical communication system apparatus and a method thereof ", Santanu Konwar and B R Boruah, Japanese Patent No.: JP, 6998868, 23 December 2021
• "A system and method for laser beam scanning with periodic switching of polarization of the beam ",Ranjan Kalita, S S Goutam Buddha and B R Boruah, Indian Patent No.: 377789, 24 September 2021
• "System, apparatus and method for monitoring of surface profile and thickness measurement in thin films ",Biswajit Pathak, Rahul Kesarwani, Alika Khare and B R Boruah, Japanese Patent No.: JP,6838075,B , 15 February 2021
• "Free space optical communication system apparatus and a method thereof ", Santanu Konwar and B R Boruah, US Patent No.: 10,673,525 02 June 2020

Patents filed(International)

• "System, apparatus and method for monitoring of surface profile and thickness measurement in thin films ", Biswajit Pathak, Rahul Kesarwani, Alika Khare and B R Boruah, Patent Application No.: PCT/IB2016/054261., 18 July 2016
• "Free space optical communication system apparatus and a method thereof ", Santanu Konwar and B R Boruah, Patent Application No.: PCT/IB2016/054233., 15 July 2016

Patents filed (Indian)

• "A Wavefront Measuring System and Method with Ameliorated Dynamic Range ",Nagendra Kumar, Alika Khare and B R Boruah, Patent Application No.: 202131015140, 31 March 2021
• "A system and method for determining Point Spread Function of an imaging system ",S S Goutam Buddha and B R Boruah, Patent Application No.: 202031014419, 31 March 2020
• "A system and method for laser beam scanning with periodic switching of polarization of the beam ",Ranjan Kalita, S S Goutam Buddha and B R Boruah, Patent Application No.: 201831006652, 21 Feb 2018
• "System, apparatus and method for monitoring of surface profile and thickness measurement in thin films ",Biswajit Pathak, Rahul Kesarwani, Alika Khare and B R Boruah, Patent Application No.: 4088/DEL/2015, 12 Dec 2015
• "Free space optical communication system apparatus and a method thereof ", Santanu Konwar and B R Boruah, Patent Application No.: 2153/DEL/2015, 15 July 2015
• "A Method and Device for Zonal Wavefront Sensing by Beam Splitting ", Biswajit Pathak and B R Boruah, Patent Application No.: 3935/DEL/2014 , 26 Dec 2014
• " A Method and Device for Zonal Wavefront Sensing Via Sequential Spatially Shifted Grating Array Patterns", Biswajit Pathak and B R Boruah, Patent Application No.: 3752/DEL/2014, 18 Dec 2014

Conference Proceedings

• Nagendra Kumar, Pranjal Choudhury, Nedup Sherpa, Akanshu Chauhan, S. S. Goutam Buddha, Karuna S. Malik, Santanu Konwar, Bosanta R. Boruah, " Improvement in wavefront measurement accuracy in grating array-based zonal wavefront sensors by modulating the intensity profile of the incident beam " Proceedings of SPIE : 12445 124450T, 2023
• Akanshu Chauhan, Nedup Sherpa, Nagendra Kumar, Pranjal Choudhury, S. S. Goutam Buddha, Bosanta R. Boruah, " Orthogonality of Zernike modes in phase profiles estimated using Zonal wavefront sensor and transport of intensity phase retrieval method " Proceedings of SPIE : 12389 123890I , 2023
• S. S. Goutam Buddha, Nagendra Kumar, Santanu Konwar, Bosanta R. Boruah, " Estimation of 3D point spread function of a widefield microscope by stochastic least square minimization method " Proceedings of SPIE : 12385 123850Z, 2023
• Nagendra Kumar, Alika Khare, Bosanta R Boruah, " Enhanced dynamic range of the grating array based zonal wavefront sensor using a zone wise scanning method " Proceedings of SPIE : 11287 112870E, 2020
• Karuna Sindhu Malik, SS Goutam Buddha, Ranjan Kalita, Bosanta R Boruah, " Estimation of maximum translation speed of a trapped particle in holographic optical tweezers " Proceedings of SPIE : 11297 112970Z, 2020
• Karuna Sindhu Malik and Bosanta R Boruah, " Computation of spot diagrams of different vector beams using geometrical exact ray tracing " Proceedings of SPIE : 11297 1129706, 2020
• Satya SG Buddha, R Kalita, Bosanta R Boruah, " Optical sectioning microscopy with both mechanical and non-mechanical beam scanning mechanisms " IEEE Xplore, Advances in Photonics (WRAP) : 1-3, 2019
• Satya SG Buddha, Bosanta R Boruah, " Signal to noise ratio enhancement in confocal microscope with an array detector " IEEE Xplore, Advances in Photonics (WRAP) : 1-3, 2019
• Ranjan Kalita, SS Goutam Buddha, Bosanta R Boruah, "Laser scanning confocal microscopy using illumination beams with different polarizations in quick succession " Proceedings of SPIE : 104772 107720I, 2018
• Santanu Konwar, Bosanta R Boruah, "An analytical study on the presence of inter-modal cross-talk in a modal wavefront sensor " Proceedings of SPIE : 104772 107720A, 2018
• Santanu Konwar, Bosanta R Boruah, "Improvement in modal wavefront sensing in terms of cross-talk reduction and linearity " Proceedings of SPIE : 104772 107720D, 2018
• Ranjan Kalita, Bosanta R Boruah, "Effect of aberration on the electric field orientation around the focus of a polarized light beam " Proceedings of SPIE : 104772 107720Y, 2018
• SS Goutam Buddha, Ranjan Kalita, Bosanta R Boruah, "Estimation of point spread function of an imaging system using a programmable target " Proceedings of SPIE : 10499 104991O-6, 2018
• Ranjan Kalita, SS Goutam Buddha, Bosanta R Boruah, "Suitability of holographic beam scanning in high resolution applications " Proceedings of SPIE : 10499 104991P-7, 2018
• Biswajit Pathak, and Bosanta R. Boruah, "Binary hologram based high speed zonal wavefront sensing with reduced estimation time " Proceedings of SPIE : 97410T 97410T-8, 2016
• Biswajit Pathak, and Bosanta R. Boruah, "Binary hologram based high speed zonal wavefront sensing with reduced estimation time " Proceedings of SPIE : 97410T 97410T-8, 2016
• Biswajit Pathak, and Bosanta R. Boruah, "Investigation of algorithm discretization error in a zonal wavefront estimation process " Proceedings of SPIE : 973916 973916-7, 2016
• Santanu Konwar, and Bosanta R. Boruah, "Observation of thermally induced movement of a beam deflected by a liquid crystal spatial light modulator " Proceedings of SPIE : 976915 976915-9, 2016
• Ranjan Kalita, and Bosanta R. Boruah, "Confocal imaging with orthogonally polarized illumination beams " Proceedings of SPIE : 971316 971316-7, 2016
• Biswajit Pathak, and Bosanta R. Boruah, "Reduction in the amount of crosstalk with reduced number of focal spot rows in a grating array based zonal wavefront sensor " Proceedings of SPIE : 9654 965414-7, 2015
• Md. Gaffark, and Bosanta R. Boruah, "Aberration resilience of azimuthally polarized beam with a helical phase mask " Proceedings of SPIE : 9272 92721H, 2014
• Biswajit Pathak, and Bosanta R. Boruah, "Analysis of error propagation in an improved zonal phase-gradient model " Proceedings of SPIE : 9272 92721Y, 2014
• Md. Gaffar, and Bosanta R. Boruah, "Effect of higher order aberrations on a radially polarized beam " Proceedings of SPIE : 9272 92720J, 2014
• Biswajit Pathak and B. R. Boruah, "Zonal wavefront estimation using an array of hexagonal grating patterns", AIP Conf. Proc. Volume 1620, pp. 86-91, 2014
• Abhijit Das, and Bosanta R. Boruah, "Dynamic control of illumination beam phase profile in a scanning optical microscope " Proceedings of SPIE : 8797 87970K, 2013
• Biswajit Pathak, Abhijit Das, and Bosanta R. Boruah, "High-speed zonal wavefront sensing " Proceedings of SPIE : 8557 85570A, 2012
• Abhijit Das and B. R. Boruah, "Point Scanning Microscope with Adaptive Illumination Beam Intensity", AIP Conf. Proc. Volume 1391, pp. 324-326, 2011
• B. R. Boruah and Abhijit Das, " Wavefront sensing with a flexible detector geometry using an array of binary holograms," Digital Holography and Three-Dimensional Imaging, OSA Techinal Digest , Optical Society of America, 2011.
• B. R. Boruah, " Confocal microscope with enhanced lateral resolution using engineered illumination pupil " Proceedings of SPIE : 7570 75700N, 2010
• B. R. Boruah, " Zonal wavefront sensing using a liquid crystal spatial light modulator " Proceedings of SPIE : 7619 76190G, 2010
• B. R. Boruah and M. A. A. Neil, "Programmable diffractive optics for laser scanning confocal microscopy" Proceedings of SPIE : 6443 644310, 2007
• B. R. Boruah, "3D depletion beams for STED microscopy", Proceedings of the XXXIII optical society of India symposium (Tata McGraw-Hill publication), 2007

International Conference Presentations

• "The effect of higher-order aberrations on a radially-polarized beam (Invited Talk) " Md. Gaffar and B. R. Boruah Photonics Asia: Beijing, China (2014)
• "Aberration resilience of azimuthally-polarized beam with a helical phase mask " Md. Gaffar and B. R. Boruah Photonics Asia: Beijing, China (2014)
• "Analysis of error propagation in an improved zonal phase-gradient model " Biswajit Pathak and B. R. Boruah Photonics Asia: Beijing, China (2014)
• "Zonal Wavefront Estimation Using an Array of Hexagonal Grating Patterns ", Biswajit Pathak and B R Boruah, OPTICS 14: International conference on light, Calicut, India (March, 2014)
• "Effect of Primary Aberrations on Focal Volume Properties of a Radially Polarized Beam ", Md. Gaffar and B R Boruah, International conference on optics and optoelectronics (ICOL-2014) , Dehradun, India (March, 2014)
• "Dynamic control of illumination beam phase profile in a scanning optical microscope ", Abhijit Das and B R Boruah, European Conferences on Biomedical Optics, Germany (2013)
• "Relative enhancement in the axially polarized field in the focal plane of a radially polarized beam", B R Boruah, Focus on Microscopy, Singapore (2012)
• "Scanning optical microscope with programmable illumination beam intensity", Abhijit Das and B R Boruah, Focus on Microscopy, Singapore (2012)
• "Relative enhancement in axially polarized field in a defocused radially polarized beam", B R Boruah, XXXV Optical Society of India Symposium and International Conference on Contemporary Trends in Optics and Optoelectronics, India (2011)
• "Zonal wavefront sensing with a flexible detector geometry", B R Boruah and Abhijit Das, XXXV Optical Society of India Symposium and International Conference on Contemporary Trends in Optics and Optoelectronics, India (2011)
• "Zonal wavefront sensing with improved dynamic range and resolution using a liquid crystal spatial light modulator", Bosanta R. Boruah, Photonics West, USA (2010)
• "Confocal microscope with enhanced lateral resolution using engineered illumination pupil", Bosanta R. Boruah, Photonics West, USA (2010)
• "FLIM beyond the diffraction limit using STED microscopy with a supercontinuum excitation source and holographic PSF control", Egidijus Auksorius, Bosanta R. Boruah, Peter M. P. Lanigan, Gordon T. Kennedy, Christopher W. Dunsby, Mark A. A. Neil, and Paul M. W. French, Photonics West, USA (2009)
• "STED microscopy with supercontinuum source, holographic PSF control and FLIM", E. Auksorius , B.R. Boruah, C. Dunsby, P.M.P. Lanigan, G.T. Kennedy, M.A.A. Neil & P.M.W. French, Focus on Microscopy, Japan (2008)
• "Stimulated emission depletion microscopy with a supercontinuum source and fluorescence life time imaging", E. Auksorius, B. R. Boruah, C. Dunsby, P. M. P. Lanigan, G. Kennedy, P. M. W. French and M. A. A. Neil, Advanced Imaging and Microscopy, Photonex07, UK (2007)
• "Programmable diffractive optics for laser scanning confocal microscopy" B. R. Boruah and M. A. A. Neil. Photonics West: San Jose, USA (2007)
• "Laser scanning microscope with dynamic control of intensity, phase and polarisation in illumination pupil" B. R. Boruah and M. A. A. Neil. Focus on Microscopy: Spain (2007)
• "Programmable optics for confocal and multi- photon microscopy", M. A. A. Neil and B. R. Boruah. European conference on biomedical optics: Munich (2007)
• "Adaptive optics with singular beams", B. R. Boruah and M. A. A. Neil. Photon06, Institute of Physics: UK, (2006)
• "Dynamic holographic wave-front references for interferometric optical testing", M. A. A. Neil, E Atad-Ettedgui, G D Love, B R Boruah and D Henry. Photon06 , Institute of Physics: UK, (2006)