Prof. Somnath Ghosh

Somnath Ghosh

Professor
somnath.ghosh@mahindrauniversity.edu.in

Prof. Somnath Ghosh is dedicated to quality teaching and learning and is passionate about cutting edge research in the emerging domains of Photonics and Quantum photonics. He has rich teaching, research, and academic administrative experience. He believes in interactive teaching and learning.He has experience in the hybrid method of teaching and flipped teaching. He even has experience of designing and development of the academic curricula for outcome-based learning. He has already supervised one post-doc, four Ph.D. thesis and more than 20 B.Tech./M.Sc./M.Tech projects…He has more than 5 years of administrative experience and has published 65 research articles in peer-reviewed journals and more than 100 papers in conferences/workshops/symposiums.

Post-doctoral

  • Post-doctoral: NTU Singapore

Ph.D.

  • Ph.D. (Physics), IIT Delhi

M.Sc.

  • M.Sc. (Physics), IIT Kharagpur

May 2024- Present

  • May 2024- Present, Professor, Mahindra University

2021-2024

Associate Professor, Indian Institute of Technology Jodhpur.

2016-2021

Assistant Professor, Indian Institute of Technology Jodhpur.

2024

  • A. Roy, S. Dey, A. Biswas and S. Ghosh, “Hosting exceptional point in all-lossy dual-core optical fiber and its exotic chiral light dynamics” Physica Scripta (IOP), 99, 5 (2024)
  • A. Laha, A. Miranowicz, R. K. Varshney and S. Ghosh, “Correlated non-reciprocity around conjugate exceptional points”, Physical Review A, 109, 033511 (2024).
  • S. Sadhukhan, and S. Ghosh, “Bandgap engineering and amplification in photonic time crystals” Journal of Optics (IOP), 26, 045601 (2024)
  • S. Roy, P. Biswas, A. Biswas and S. Ghosh, “Enhanced transmission capacity through a specialty multi-channel topological optical fiber” Optics Communications, 557, 130282 (2024)
  • A. Roy, S. Dey, B. P. Pal and S. Ghosh, “Suppression of excess noise in a chiral optical mode converter without an encircling exceptional point”, J. Opt. Soc. Am. B, 41(11), 2534-2539 (2024)
  • J. Pannu, S. Ghosh, S. Bhattacherjee, and S. Ghosh, “Branched flow of light and interplay with input phase front curvature in a disordered photonic lattice”, Optics Communications, 570, 130924, (2024)

2023

  • S. Dey, N. R. Das and S. Ghosh, “High Power Pulse Delivery Over a Short Distance Through an All-solid Anti-Resonant Microstructured Optical Fiber at 2 µm Wavelengh” Optical Fiber Technology, 81, 103575, (2023)
  • P. Biswas, B. P. Pal, and S. Ghosh, “Ultra-wide bandwidth all-solid specialty bandgap fiber for ultrashort pulse delivery” Optical and Quantum Electronics, 55, 1260, (2023)
  • S. Sadhukhan and S. Ghosh, “Defect in photonic time crystals” Physical review A, 108, 023511 (2023).
  • S. Dey and S. Ghosh, “Exploring anomalous light dynamics around higher-order conjugate exceptional points with local nonlinearity” Physical review A, 108, 023508 (2023).
  • S. Bhattacherjee, J. Pannu, S. Mujumdar, and S. Ghosh, “Signature and kinetics of stochastic branching of light in disordered active photonic lattices” Optics communications, 545, 129744 (2023).
  • P. Biswas, and S. Ghosh, “Towards nonreciprocal pulse dynamics in a time-varying medium” Physica Scripta (IOP) 98, 035505 (2023)

2022

  • S. Dey, A. Roy, and S. Ghosh, “Light dynamics around an exceptional point in a 1D photonic bandgap waveguide”, Physica Scripta (IOP) 97, 085501 (2022)
  • D. Beniwal, A. Laha, and S. Ghosh, “Parametrically encircled higher-order exceptional points and successive state-switching in an all-lossy optical microcavity”, Asian Journal of Physics 31, 3-6, 483-494 (2022). Invited
  • S. Bhattacherjee, and S. Ghosh, “Signature of simultaneous onset of topological edge-state and transverse localized state in a 1-D specialty photonic lattice” Optics communication, 520, 128500, (2022).
  • A. Roy, S. Dey, A. Laha, A. Biswas, and S. Ghosh, “Exceptional Point induced asymmetric mode conversion in a dual-core optical fiber segment”, Optics Letters, 47, 2546-2549 (2022)
  • A. Laha, S. Dey, and S. Ghosh “Reverse-chiral response of two T-symmetric optical systems hosting conjugate exceptional points” Physical review A, 105, 022203, (2022).
  • S. Dey, N. R. Das and S. Ghosh, “Exploring unconventional features of light dynamics in Aubrey–André–Harper model based quasi-periodic optical lattices" Optics communication, 506, 127593 (2022).

2021

  • A. Paul, A. Laha, and S. Ghosh, “Hosting of exceptional points in an atom-field interaction Hamiltonian and manipulation of light states,” Physica Scripta (IOP), 96(7), 075503 (2021).
  • P. Biswas, S. Dey, and S. Ghosh, “Specialty topological fiber using periodic lattice geometries" Physical review A, 104, 043513 (2021).
  • S. Bhattacherjee, P. Biswas, and S. Ghosh, “Identifying topological signature of 1D photonic lattice by Zak phase analysis and towards robust amplification of edge state” Journal of Optics, 23, 095604 (2021). [IF: 2.516]
  • A. Paul, A. Laha, S. Dey, and S. Ghosh, “Asymmetric guidance of multiple hybrid modes through a gain-loss-assisted planar coupled-waveguide system hosting higher-order exceptional points,” Physical Review A (APS) 104(6), 063503 (2021).
  • S. Dey, A. Laha, and S. Ghosh, “Exotic light dynamics around an exceptional point of order four associated with three connecting second-order exceptional points,” Journal of the Optical Society of America B (OSA) 38(4), 1297—1306 (2021).
  • A. Laha, D. Beniwal, and S. Ghosh, “Successive switching among four states in a gain-loss-assisted optical microcavity hosting exceptional points up to order four,” Physical Review A (APS) 103(2), 023526 (2021). [
  • S. Dey, A. Laha, and S. Ghosh, “Nonadiabatic modal dynamics around a third-order exceptional point in a planar waveguide,” Optics Communications (Elsevier) 483, 126644 (2021).
  • P. Biswas, S. Ghosh, and B. P. Pal, "Spectral response of a short optical pulse in a dispersion oscillating specialty fiber with higher order nonlinearities" Asian Journal of Physics 30(1), 21-29 (2021). Invited

2020

  • H. K. Gandhi, A. Laha, and S. Ghosh, “Ultrasensitive light confinement: Driven by multiple bound states in the continuum,” Physical Review A 102, 033528 (2020).
  • J. Doley, A. Laha, S. Dey, and S. Ghosh, “Effect of a local nonlinearity on the light dynamics around an exceptional point: A quantitative analysis,” Physical Review Research 2, 023371 (2020).
  • A. Laha, D. Beniwal, S. Dey, A. Biswas, and S. Ghosh, “Third-order exceptional point and successive switching among three states in an optical microcavity,” Physical Review A 101, 063829 (2020).
  • A. Laha, S. Dey, H. K. Gandhi, A. Biswas, and S. Ghosh, “Exceptional point and toward mode selective optical isolation,” ACS Photonics 7, 967—974 (2020).
  • S. Dey, A. Laha, and S. Ghosh, “Nonlinearity induced anomalous mode collapse and non-chiral asymmetric mode switching around multiple exceptional points,” Physical Review B 101, 125432 (2020). [IF: 4.036]
  • H. K. Gandhi, A. Laha, S. Dey, and S. Ghosh, “Chirality breakdown in the presence of multiple exceptional points and specific mode excitation,” Optics Letters 45, 1439—1442 (2020).
  • S. Bhattacherjee, S. Mujumdar, and S. Ghosh, “Lévy flight of superdiffusive light in coupled waveguide lattices,” Physical Review Research 2, 012037(R) (2020).

2019

  • B. Bakshi, A. Barh, S. Ghosh, R. K. Varshney, and B. P. Pal, “Guided wave photonics for light sources, sensors and passive components at mid-IR,” Asian Journal of Physics (Invited) 28, 877—889 (2019).
  • S. Bhattacherjee, H. K. Gandhi, A. Laha, and S. Ghosh, “Higher-order topological degeneracies and progress towards unique successive state switching in a four-level open system,” Physical Review A 100, 062124 (2019).
  • P. Biswas, and S. Ghosh, “Towards stable delivery of high energy through background-guided similariton pulses,” Asian Journal of Physics (Invited) 28, 541—552 (2019).
  • P. Biswas, H. K. Gandhi, and S. Ghosh, “Asymmetric propagation and limited wavelength translation of optical pulses through a linear dispersive time-dynamic system,” Optics Letters 44, 3022—3025 (2019). [
  • S. Bhattacherjee, A. Laha, and S. Ghosh, “Topological dynamics of an adiabatically varying Hamiltonian around third order exceptional points,” Physica Scripta 94, 105509 (2019).
  • S. Bhattacherjee, A. Laha, and S. Ghosh, “Encounter of higher order exceptional singularities and towards cascaded state conversion,” Physica Scripta 94, 085202 (2019).
  • A. Laha, A. Biswas, and S. Ghosh, “Minimally asymmetric state conversion around exceptional singularities in a specialty optical microcavity,” Journal of Optics (IOP) 21, 025201 (2019).

2018

  • A. Laha, A. Biswas, and S. Ghosh, “Nonadiabatic modal dynamics around exceptional points in an all-lossy dual-mode optical waveguide: Toward chirality-driven asymmetric mode conversion,” Physical Review Applied 10, 054008 (2018).
  • P. Biswas, H. K. Gandhi, V. Mishra, and S. Ghosh, “Propagation and asymmetric behavior of optical pulses through time-dynamic loss–gain-assisted media,” Applied Optics 57, 7167—7171 (2018).
  • S. Ghosh, “Signature of phase singularities in diffusive regimes in disordered waveguide lattices: interplay and qualitative analysis,” Applied Optics 57, 3669—3673 (2018).
  • S. Bhattacherjee, A. Biswas, and S. Ghosh, “Less-dispersive specialty optical fibers with an enhanced operational bandgap for applications in the mid-infrared region,” Journal of Optical Society of America B 35, 73—80 (2018).

2017

  • A. Roy, A. Biswas, R. K. Varshney and S. Ghosh, “Highly sensitive refractive index sensor based on degeneracy in specialty optical fibers: a new approach,” Micro-System Technologies 26, 3063—3068, (2017).
  • P. Biswas, B. P. Pal, A. Biswas, and S. Ghosh, “Toward self-similar propagation of optical pulses in a dispersion tailored, nonlinear, and segmented Bragg-fiber at 2.8 μm,” IEEE Photonics Journal 9, 7104412, (2017).
  • A. Laha, A. Biswas, and S. Ghosh, “Next nearest neighbor resonance coupling and exceptional singularities in degenerate optical microcavities,” Journal of Optical Society of America B 34, 2050—2058 (2017).
  • A. Laha, and S. Ghosh, “Connected hidden singularities and toward successive state flipping in degenerate optical microcavities,” Journal of Optical Society of America B 34, 238—244 (2017).

2016

  • S. Ghosh and Y. D. Chong, “Exceptional points and asymmetric mode conversion in quasi-guided dual-mode optical waveguides,” Scientific Reports (Nature) 6, 19837 (2016).
  • A. Laha and S. Ghosh, “Suppression of excess noise of longer-lived high-quality states in nonuniformly pumped optical microcavities,” Optics Letters 41, 942—945 (2016).
  • P. Biswas, P. Adhikary, A. Biswas, and S. Ghosh, “Formation and stability analysis of parabolic pulses through specialty microstructured optical fibers at 2.1 μm,” Optics Communications 377, 120—127 (2016).

2013-2015

  • F. Liu, S. Ghosh, and Y. D. Chong, “Localization and adiabatic pumping in a generalized Aubry-André-Harper model,” Physical Review B 91, 014108 (2015).
  • A. Barh, S. Ghosh, R. K. Varshney, B. P. Pal, J. S. Sanghera, L. B. Shaw, and I. D. Aggarwal, “Mid-IR fiber optic light source around 6 µm through parametric wavelength translation,” Laser Physics 24, 115401 (2014).
  • A. Barh, S. Ghosh, R. K. Varshney, and B. P. Pal, “A Tapered Chalcogenide Microstructured Optical Fiber for Mid-IR Parabolic Pulse Generation: Design and Performance Study,” IEEE Journal of Selected Topics in Quantum Electronics 20, 590—596 (2014).
  • S. Ghosh, B. P. Pal, R. K. Varshney, and H. Ahmad, “Transverse localization of light in 1D disordered waveguide lattices in the presence of a photonic bandgap,” Laser Physics 24, 045001 (2014).
  • A. Barh, S. Ghosh, R. K. Varshney, and B. P. Pal, “Ultra-large mode area microstructured core chalcogenide fiber design for mid-IR beam delivery,” Optics Communications, 311, 129—133 (2013).
  • S. Ghosh, R. K. Varshney, and B. P. Pal, “Generation of a low divergent supercontinuum for mid-IR high power delivery through a large mode area photonic bandgap fiber,” Laser Physics 23, 095105 (2013).
  • S. Ghosh, R. K. Varshney, and B. P. Pal, “Anderson localization of light in the presence of weak longitudinal modulation of the refractive index in 1D disordered waveguide lattices,” Laser Physics Letters 10, 085002 (2013).
  • A. Barh, S. Ghosh, R. K. Varshney, and B. P. Pal, “An efficient broad-band mid-wave IR fiber optic light source: design and performance simulation,” Optics Express 21, 9547-9555 (2013). [*Selected in Advances in Engineering-breaking journal articles considered to be of importance to the progress in Engineering technologies]
  • A. Barh, S. Ghosh, G. P. Agrawal, R. K. Varshney, I. D. Aggarwal, and B. P. Pal, “Design of an efficient mid-IR light source using chalcogenide holey fibers: a numerical study,” Journal of Optics (IOP) 15, 035205 (2013). [*Selected by the editors of Journal of Optics for inclusion in the exclusive ‘Highlights of 2013’ collection. Article is chosen on the basis of referee endorsement, novelty, scientific impact and broadness of appeal]

2007-2012

  • S. Ghosh, B. P. Pal, R. K. Varshney, and G. P. Agrawal, “Transverse localization of light and its dependence on the phase front curvature of the input beam in a disordered optical waveguide lattice,” Journal of Optics (IOP) 14, 075701 (2012).
  • S. Ghosh, B. P. Pal, and R. K. Varshney, “Role of optical nonlinearity on transverse localization of light in a disordered one-dimensional optical waveguide lattice,” Optics Communications 285, 2785—2789 (2012). [IF
  • S. Ghosh, N. D. Psaila, R. R. Thomson, B. P. Pal, R. K. Varshney, and A. K. Kar, “Ultra-fast laser inscribed waveguide lattice in glass for direct observation of transverse localization of light,” Applied Physics Letters 100, 101102 (2012).
  • S. Ghosh, S. Dasgupta, R. K. Varshney, D. J. Richardson, and B. P. Pal, “Design of a photonic bandgap fiber with large mode area for mid-Infrared applications,” Optics Express 19, 21295—21304 (2011).
  • S. Ghosh, G. P. Agrawal, B. P. Pal, and R. K. Varshney, “Localization of light in evanescently coupled disordered waveguide lattices: Dependence on the input beam profile,” Optics Communications 284, 201—206 (2011).
  • S. Ghosh, R. K. Varshney, B. P. Pal, and G. Monnom, “A Bragg-like chirped clad all-solid microstructured optical fiber with ultra-wide bandwidth for short pulse delivery and pulse reshaping,” Optical and Quantum Electronics 42, 1—14 (2010).
  • B. P. Pal, S. Ghosh, R. K. Varshney, S. Dasgupta, and A. Ghatak, “Loss and dispersion tailoring in 1D photonics band gap Bragg reflection waveguides: finite chirped claddings as a design tool,” Optical and Quantum Electronics 39, 983—993 (2007).

Prof Ghosh has a keen interest in emerging domains of photonics and quantum photonics. His broad research interests include Non-Hermitian Quantum Photonics and Topological Photonics. He has been exploring new physics of Exceptional Points and their applications, Photonic Time crystals and their applications, Specialty Optical Fibers and their applications, and Complex Optical Systems to host novel light dynamics. In Complex photonics, he has been investigating phenomena including Anderson localization of light, Levy flight of light, and Branched flow of light. He has studied large-mode area optical fibers, high-power delivery of short optical pulses through specialty optical fibers, ultra-large bandwidth optical fibers, and specialty optical fibers for gyroscopic applications. He has contributed to hosting bound state in continuum (BIC) in photonic structures. He and his team have experimentally demonstrated Anderson-type transverse localization of light in one dimensional system. He has studied the amplification of light in a photonic time crystal, which is an unconventional scheme for the same. His team has proposed the 1D topological optical fiber, a next-generation fiber geometry for specialty applications. He has also contributed significantly to mid-infrared photonics research. Currently, he is exploring quantum sensing using optical waveguides.

If you are interested in joining the group as a researcher/intern, please feel free to contact me.