Journal Publications
Transition metal (group V) doping induced spin and valley polarization in MoS2 monolayer. S Kumawat, Sunil Kumar and B Mani Submitted (2026). Link
Robust topological protection of V-point lattice. R Joshi, A Maurya, S Pal, Sunil Kumar and P. Senthilkumaran Submitted (2026). Link
Ultra-Broadband Optical Characterization of TiO2 Nanotube Arrays Revealing Annealing-Tunable THz Absorption. A Chaudhary, M Afshar, EJY Magaway, Sunil Kumar, R Varshney, I Richter, Š Kment, M N-Cía, and L Mascaretti Nanophotonics 15, e70231 (2026). Link
Generation of MHz-GHz-THz sequence of ultrashort high energetic comb electron beam bunches for prebunched THz-FEL using Yb doped all fiber laser system. B Karmakar, A Aryshev, J Karmakar, M Aggarwal, P Patraa, A Sharmaa, B Sahu, P Mukhopadhyay, S Ghosh, and Sunil Kumar Submitted (2026). Link
Substrate driven disparity in ß-Ga2O3 thin film properties grown by pulsed laser deposition. P Pal, A Pandey, S Dutta, Sunil Kumar and S Singh Submitted (2026). Link
Self-healing in topologically protected polarization lattice structures. R Joshi, A Maurya, S Pal, Sunil Kumar and P Senthilkumaran Submitted (2026). Link
Temperature dependent current voltage characteristics of a lateral Schottky barrier diode on ß-Ga2O3 /4H-SiC heterostructure. P Pal, A Pandey, S Dutta, Sunil Kumar and S Singh Submitted (2026). Link
Broadband reflective THz QW-metasurface enabled by two-photon polymerization 3d-printing. A Chaudhary, A Sajan, R Chikkaraddy, Sunil Kumar, R Varshney, M N-Cia Advanced Photonics Research 7, e70225 (2026). Link
Control of ultrafast excitonic shift current induced THz emission efficiency of layered MoS2 crystals. N Dhakar and Sunil Kumar Applied Physics Letters 128, 151105 (2026). Link
Angularly stable THz metasurface with multi-frequency narrowband cross-polarization conversion and broadband QWP Function. A Chaudhary, M Momtazpour, L Xu, M Rahmani, Sunil Kumar, R Varshney and M N-Cia Advanced Photonics Research 7, e70173 (2026). Link
Strain modulated optoelectronic properties of graphene and MoS2 based bilayer and trilayer heterostructures. S Kumawat, C Vishwakarma, M Zeeshan, Sunil Kumar and B Mani Journal of Physics: Condensed Matter 38, 135303 (2026). Link
Exploring the interplay of bulk and surface carrier dynamics in additive-engineered halide perovskites. S Gupta, L Hui, PL Burn, Sunil Kumar and PE Shaw Advanced Optical Materials 14, e01566 (2026). Link
Burst mode amplification through Yb doped PCF ROD amplifier to generate mJ burst energy with femtosecond multi-micro bunch structure in all fiber laser system. B Karmakar, A Aryshev, J Karmakar, M Aggarwal, B Sahu, P Mukhopadhyay, S Ghosh, and Sunil Kumar Optics Communications 596, 132481 (2025). Link
Synthesis and characterization of pulsed laser deposited ß-Ga2O3 thin films. P Pal, A Pandey, S Dutta, Sunil Kumar and S Singh Journal of Materials Science: Materials in Electronics 36, 1820 (2025). Link
Emergence of half-metallic ferromagnetism and valley polarization in transition metal substituted WSTe monolayer. S Kumawat, C.K. Vishwakarma, M. Zeeshan, I. Mal, Sunil Kumar and B Mani Physical Review Materials 9, 054003 (2025). Link
Generation of ultrafast user defined multi micro-pulse burst structure from a femtosecond mode-locked fibre oscillator by using semiconductor optical amplifier for photoinjector. B Karmakar, A Aryshev, J Karmakar, M Aggarwal, B Sahu, P Patra, S Ghosh, P Mukhopadhyay, T Rao, and Sunil Kumar Review of Scientific Instruments 96, 053001 (2025). Link
Superior self-healing properties of generic Poincaré beam. R Joshi, B Komal, G Arora, Sunil Kumar and P Senthilkumaran Journal of Optics 27, 065604 (2025). Link
THz optical fibers in Roadmap on specialty optical fibers Anjali and Sunil Kumar Journal of Physics: Photonics 7, 012501 (2025). Link
Influence of the process parameters on phase stabilisation and microstructure control of TiO2 thin films for optoelectronic application. T Wani, S Gupta, J Anand, P Mishra, K Sakshi, N Dhakar, H Sharma, S Roy, Sunil Kumar, K Balasubramanian, and A Goswami Journal of Materials Science: Materials in Electronics 36, 2122 (2025). Link
THz probing of non-trivial topological states in Co2MnGe Heusler alloy thin films. E Yadav, A Nivedan and Sunil Kumar Applied Physics Letters 125, 132406 (2024). Link
Significant enhancement in THz emission and piezoelectricity in atomically thin Nb-doped MoS2. N Dhakar, Z Pin, H Y Lee, S-W Kim, B Kumar, and Sunil Kumar ACS Applied Materials & Interfaces 16, 47477 (2024). Link
Analysis of Stokes singularities using lateral shear interferometer. R Joshi, B Komal, Sunil Kumar, P Senthilkumaran Optics Continuum 3, 1180 (2024). Link
Unveiling surface and bulk contributions in THz emission from Bi2Te3. A Nivedan and Sunil Kumar New Journal of Physics 26, 033044 (2024). Link
Intrinsic free carrier absorption limited THz generation from Bi2Te3 and Bi2Se3 topological insulators. A Nivedan and Sunil Kumar Applied Physics Letters 124, 091109 (2024). Link
Polarization singularity index determination using wedge plate lateral shear interferometry. B Komal, R Joshi, Sunil Kumar, P Senthilkumaran Optics and Lasers in Engineering 177, 108119 (2024). Link
Probing defect induced room temperature ferromagnetism in Chemical Vapor Deposition grown MoO3 flakes: A correlation with electronic structure and first principle-based calculations. S Dey, V Mishra, N Dhakar, Sunil Kumar, P Srivastava, S Ghosh Journal of Alloys and Compounds 980, 173650 (2024). Link
Ultrafast THz probing of nonlocal orbital current in transverse multilayer metallic heterostructures. S Kumar and Sunil Kumar Nature Communications 14, 8185 (2023). Link
Ultrafast THz spin and orbital transport in magnetic/nonmagnetic multilayer heterostructures and a perspective. S Kumar and Sunil Kumar Journal of Applied Physics 134, 170901 (2023). Link
Intrinsically dominated anomalous Hall effect in epitaxial Co2MnGe ferromagnetic full Heusler alloy thin films. E Yadav and Sunil Kumar RSC Advances 13, 30101 (2023). Link
Resistive switching and battery-like characteristics in highly transparent Ta2O5/ITO thin-films. D Khone, S Kumar, M Balal, SR Barman, Sunil Kumar and AS Rana Scientific Reports 13, 14297 (2023). Link
An interplay between optical rectification and transient photocurrent effect on THz pulse generation from bulk MoS2 layered crystal. N Dhakar, S Kumar, A Nivedan and Sunil Kumar Journal of Physics D: Applied Physics 56, 435105 (2023). Link
Excitation wavelength-dependent ultrafast THz emission from surface and bulk of three-dimensional topological insulators. A Nivedan and Sunil Kumar Journal of Physics D: Applied Physics 56, 255101 (2023). Link
Actively tunable Graphene ribbon based multi-band THz polarizer with a high extinction ratio. Anjali, RK Varshney and Sunil Kumar Journal of the Optical Society of America B 40, 1688 (2023). Link
Strong impact of crystalline twins on the amplitude and azimuthal dependence of THz emission from epitaxial NiO/Pt. R Agarwal, S Kumar, N Chowdhury, KIA Khan, E Yadav, Sunil Kumar and PK Muduli Applied Physics Letters 122, 082403 (2023). Link
Role of symmetry in self-healing of singular beams. B Komal, G Arora, Sunil Kumar and P Senthilkumaran Applied Physics B 129, 29 (2023). Link
Hybrid thermo-physical modelling and experimentation of ultrafast laser-based fabrication of polycrystalline core-amorphous shell nitinol nanoparticles. V Parmar, S Singh, A Singh, Sunil Kumar, D Kalyanasundaram Optics and Laser Technology 165, 109575 (2023). Link
Visible and NIR-Light Photoactivatable o-Hydroxycinnamate System for Efficient Drug Release with Fluorescence Monitoring. A Gupta, N Singh, A Gautam, N Dhakar, Sunil Kumar and P Sasmal RSC Med. Chem. 14, 1088-1100 (2023). Link
Role of position specific Ga and N vacancy in tailoring the ferromagnetic properties of thin GaN films. S Dey, P Singh, V Mishra, N Dhakar, Sunil Kumar, F Singh, P Srivastava, S Ghosh Solid State Communications 371, 115232 (2023). Link
Generation and beam steering of THz radiation in an actively modulated nonlinear crystal. V Kumar, R Varshney and Sunil Kumar Optics Communications 526, 128950 (2022). Link
Functional Thin Films for Perovskite Solar Cells. F Wang and Sunil Kumar Coatings 12, 952 (2022). Link
Large interfacial contribution to ultrafast THz emission by inverse spin Hall effect in CoFeB/Ta heterostructure. S Kumar and Sunil Kumar iScience 25, 104718 (2022). Link See the Supplementary Information also.
Ultrafast light-induced THz switching in exchange-biased Fe/Pt spintronic heterostructure. S Kumar and Sunil Kumar Applied Physics Letters 120, 202403 (2022). Link Published as Editor's pick article in the Journal.
Ultrafast, broadband and tunable THz reflector and neutral density filter based on high resistivity silicon. J Degert, M Tondusson, V Freysz, E Abraham, Sunil Kumar and E Freysz Optics Express 30, 18995-19004 (2022). Link
THz photonics and optoelectronics of carbon-based nanosystems. A Singh and Sunil Kumar Journal of Applied Physics 131, 160901 (2022). Link
Self-healing of vector field singularities. B Komal, G Arora, Sunil Kumar and P Senthilkumaran Optics Communications 524, 128796 (2022). Link
Phonon Bottleneck in Temperature-Dependent Hot Carrier Relaxation in Graphene Oxide. A Singh and Sunil Kumar Journal of Physical Chemistry C 125, 26583 (2021). Link
Optical Damage Limit of Efficient Spintronic THz Emitters. S Kumar, A Nivedan, A Singh, Y Kumar, P Malhotra, M Tondusson, E Freysz, and Sunil Kumar iScience 24, 103152 (2021). Link See the Supplementary information also.
Sub-bandgap activated charges transfer in a graphene-MoS2-graphene heterostructure. S Kumar, A Singh, A Nivedan, S Kumar, SJ Yun, YH Lee, M Tondusson, J Degert, J Oberle, E Freysz Nano Select 2(10), 2019 (2021). Link See the Supplementary information also.
Plasmonic charge transfers in large-scale metallic and colloidal photonic crystal slabs. S Sarkar, V Gupta, T Tsuda, J Gour, A Singh, O Aftenieva, A M Steiner, M Hoffmann, Sunil Kumar, A Fery, J Joseph, TAF König Advanced Functional Materials 31, 2011099 (2021). Link
Mitochondria-Targeted Photoactivatable Real-Time Monitoring of a Controlled Drug Delivery Platform. N Singh, P Prasad, RK Sah, A Gupta, A Singh, Sunil Kumar, S Singh, S Gupta, and PK Sasmal Journal of Medicinal Chemistry 64, 17813 (2021). Link
THz pulses from optically excited Fe, Pt and Ta based Spintronic Heterostructures. S Kumar, A Nivedan, A Singh and Sunil Kumar Pramana Journal of Physics 95, 75 (2021). Link Preprint at https://arxiv.org/abs/2101.04969
Enhancement in optically induced ultrafast THz conductivity in MoSe2MoS2 heterobilayer. S Kumar, A Singh, S Kumar, A Nivedan, M Tondusson, J Degert, J Oberle, SJ Yun, YH Lee, E Freysz Optics Express 29(3), 4181-4190 (2021). Link See the Supplementary information also.
The emergence and origin of broader light emission from layered (C12H25NH3)2MnCl4 at low-temperatures. M Bochalya, A Nivedan, S Kumar, A Singh, and Sunil Kumar Journal of Materials Chemistry C 9, 5998 (2021). Link
Temperature-dependent ultrafast response and pi-plasmon dynamics in single walled carbon nanotubes. A Singh, S Kumar, A Nivedan, and Sunil Kumar Journal of Physical Chemistry Letters 12, 627-632 (2021). Link
Helicity inversion and generation of orthogonal, degenerate index states of generic C points. B Komal, S Deepa, SK Pal, BS Bhargava Ram, Sunil Kumar, and P Senthilkumaran Journal of Optics 23, 114001 (2021). Link
Polarization singularity index determination by using a tilted lens. B Komal, D Sathyanarayanan, Sunil Kumar, P Senthilkumaran Applied Optics 60, 3266 (2021). Link
Thermo-physical modeling and experimental validation of core-shell nanoparticle fabrication of nickel-titanium (nitinol) alloy. V Parmar, S Singh, Sunil Kumar, G Prakash, and D Kalyanasundaram Optics and Laser Technology 138, 106880 (2021). Link
Optical and THz Response of Carbon Nanostructures. A Singh and Sunil Kumar Asian Journal of Physics 30(4), 633-654 (2021). Link Preprint at https://arxiv.org/abs/2104.06122
Compact and efficient polarization splitter based on dual core microstructured fiber for THz photonics. V Kumar, RK Varshney, and Sunil Kumar Results in Optics 4, 100094 (2021). Link
Role of H-bond along with oxygen and zinc vacancies in the enhancement of ferromagnetic behavior of ZnO films: an experimental and first principle-based study. P Singh, V Mishra, S Barman, SR Barman, M Balal, S R Barma, A Singh, Sunil Kumar, R Ramachandran, P Srivastava, and S Ghosh Journal of Alloys and Compounds 889,161663 (2021). Link
Tuning of ferromagnetic behavior of GaN films by N ion implantation: an experimental and first principle-based study. P Singh, S Ghosh, V Mishra, S Barman, SR Barman, A Singh, Sunil Kumar, Z Li, U Kentsch, P Srivastava Journal of Magnetism and Magnetic Materials 523, 167630 (2021). Link
Study of Eutectic Etching Process for Defects Analysis in n-type 4H-SiC. P Pal, Sunil Kumar and S.K. Singh Defense Science Journal 70(5), 515 (2020). Link
Defect mediated modification of structural, optical and magnetic properties of Xe3+ ions irradiated GaN/sapphire films. P Singh, S Ghosh, A Singh, Sunil Kumar, S Ojha, P Srivastava Nuc. Inst. Meth. Phys. Res. B 466, 61 (2020). Link
Lead-Free Two-Dimensional (R-NH3)2MX4 Inorganic-Organic Hybrids: Solid-Solid Phase Transitions
and Broadband Emission.
M Bochalya and Sunil Kumar
Journal of Physics D: Applied Physics 53, 444002 (2020).
Link
Magnetic field-dependent resistance crossover and anomalous magnetoresistance in topological insulator Bi2Te3. A Nivedan, K Das, S Kumar, A Singh, S Mardanya, A Agarwal and Sunil Kumar Journal of Physics: Condensed Matter 32, 425002 (2020). Link
Photo-Seebeck effect in single-crystalline bismuth telluride topological insulator. A Nivedan, A Singh, S Kumar and Sunil Kumar Applied Physics Letters 116, 141902 (2020). Link Published as Featured article in the Journal.
Design of a compact and broadband THz polarization splitter based on gradient dual core photonic crystal fiber. V Kumar, RK Varshney and Sunil Kumar Applied Optics 59(7), 1974 (2020). Link
Magnetocaloric Effect in Alkylammonium Copper Halides Layered Inorganic-Organic Systems. M Bochalya and Sunil Kumar Journal of Applied Physics 127(5), 055501 (2020). Link
THz Generation by Four-Wave Mixing and Guidance in Diatomic Teflon Photonic Crystal Fibers. V Kumar, RK Varshney and Sunil Kumar Optics Communications 454, 124460 (2020). Link
Impurity assisted hopping-conduction and persistent-photoconductivity in disordered carbon nanoparticle film. A Singh, A. Nivedan, S. Kumar, and Sunil Kumar Journal of Applied Physics 126(22), 225102 (2019). Link
Structural and optical diversity in copper halide-based ferromagnetic inorganic-organic layered hybrids. M Bochalya, P. Kanaujia, G.V. Prakash, and Sunil Kumar J. Solid State Chem. 273, 219-225 (2019). Link
Magnetism and phase segregation in two-dimensional inorganic-organic (C12H25NH3)2Cu1-yMnyCl4 hybrids. M Bochalya, G.V. Prakash, and Sunil Kumar J. Solid State Chem. 273, 32-36 (2019). Link
Self-functionalized ultrastable water suspension of luminescent carbon quantum dots. A Singh, P. Mahapatra, D. Kalyanasundaram, and Sunil Kumar Materials Chemistry and Physics 225, 23-27 (2019). Link
Coherent centres for light amplification in coupled waveguide arrays. A Tripathi and Sunil Kumar Optics Communications 418, 16–21 (2018). Link
Coherently enhanced chirp CARS microscopy by notch filtering. L Ren, H. Frostig, Sunil Kumar, I. Hurwitz and Yaron Silberberg Optics Express 25(23), 28201 (2017). Link
Single-pulse CARS based multimodal nonlinear optical microscope for bioimaging. Sunil Kumar, T. Kamali, J.M. Levitte, Ori Katz, B. Hermann, R. Werkmeister, B. Považay, W. Drexler, A. Unterhuber, and Yaron Silberberg Optics Express 23(10) 13082 (2015). Link
Hybrid single source online Fourier transform coherent anti-Stokes Raman scattering / optical coherence tomography. T Kamali, B. Považay, Sunil Kumar, Yaron Silberberg, B. Hermann, R. Werkmeister, W. Drexler, and A. Unterhuber Optics Letters 39 5709-5712 (2014). Link
Signatures of superconducting and pseudogap phases in ultrafast transient reflectivity of Ca(Fe0.927Co0.073)2As2. Sunil Kumar, L. Harnagea, S. Wurmehl, B. Buechner, and A. K. Sood Europhysics Letters 105, 47004 (2014). Link
Tuning ultrafast photoresponse of gold nanorods. Sunil Kumar, M. Anija, and A. K. Sood Plasmonics 8, 1477-1483 (2013). Link
Ultrafast photoinduced enhancement of nonlinear optical response in 15-atom gold clusters on indium tin oxide conducting film. Sunil Kumar, E. S. Shibu, T. Pradeep, and A. K. Sood Optics Express 21, 8483-8492 (2013). Link
Gap-dependent quasiparticle dynamics and coherent acoustic phonons in parent iron pnictide CaFe2As2 across spin density wave phase transition. Sunil Kumar, L. Harnagea, S. Wurmehl, B. Buchner, and A. K. Sood Journal of Physical Society of Japan 82, 044715-044723 (2013). Link
Ultrafast quasiparticle dynamics in superconducting iron pnictide Ca(Fe0.944Co0.056)2As2. Sunil Kumar, L. Harnagea, S. Wurmehl, B. Buchner, and A. K. Sood Solid State Communication 160, 8-12 (2013). Link
Acoustic and optical phonon dynamics from ultrafast time-resolved optical spectroscopy of superconducting Ca(Fe0.944Co0.056)2As2 iron pnictide. Sunil Kumar, L. Harnagea, S. Wurmehl, B. Buchner, and A. K. Sood Europhysics Letters 100, 57007-57012 (2012). Link
Probing ultrafast carrier dynamics and nonlinear absorption and refraction in core-shell silicon nanowires. Sunil Kumar, M. Khorasaninejad, M. M. Adachi, K. S. Karim, S. S. Saini, A. K. Sood Pramana Journal of Physics 79, 471-481 (2012). Link
Coherent phonons in Pyrochlore titanates A2Ti2O7 (A=Dy, Gd and Tb): a phase transition in Dy2Ti2O7 at 110 K. N. Kamaraju, Sunil Kumar, S. Saha, S. Singh, R. Suryanarayanan, A. Revcolevschi, and A.K. Sood Physical Review B 83, 134104-134109 (2011). Link
Femtosecond photoexcited carrier dynamics in reduced graphene oxide suspensions and films. Sunil Kumar, N.Kamaraju, K. S. Vasu and A. K. Sood International Journal of Nanoscience 10, 669-673 (2010). Link
Ultrafast dynamics of gold nanorods: Tuning between photo-bleaching and photo-induced absorption. M. Anija, Sunil Kumar, N.Kamaraju, Neha Tiwari, S.K. Kulkarni and A.K. Sood International Journal of Nanoscience 10, 687-691 (2010). Link
Graphene analogue BCN: femtosecond nonlinear optical susceptibility and hot carrier dynamics. Sunil Kumar, N. Kamaraju, K. S. Vasu, A. Nag, A. K. Sood, and C. N. R. Rao Chemical Physics Letters 499, 152-157 (2010). Link
Influence of two photon absorption induced free carriers on coherent polariton and phonon generation in ZnTe crystals. N. Kamaraju, Sunil Kumar, E. Freysz, and A. K. Sood Journal of Applied Physics 107, 103102-103106 (2010). Link
THz spectroscopy of single walled carbon nanotubes embedded polymer films: observation of low frequency phonons. Sunil Kumar, N. Kamaraju, B. Karthikeyan, M. Tondusson, E. Freysz, and A. K. Sood Journal of Physical Chemistry C 114, 12446-12450 (2010). Link
Temperature-dependent chirped coherent phonon dynamics in Bi2Te3 using high intensity femtosecond laser pulses. N. Kamaraju, Sunil Kumar, and A. K. Sood Europhysics Letters 92, 47007-47012 (2010). Link
Large-amplitude chirped coherent phonons in tellurium mediated by ultrafast photoexcited carrier diffusion. N. Kamaraju, Sunil Kumar, M. Anija, and A. K. Sood Physical Review B 82, 195202-195208 (2010). Link
THz time domain spectroscopy of low frequency vibrations of double walled carbon nanotubes. Sunil Kumar, N.Kamaraju, A. Moravsky, R. O. Loutfy, M. Tondusson, E. Freysz, and A. K. Sood European Journal of Inorganic Chemistry 2010, 4363-4366 (2010). Link
Direct observation of low frequency confined acoustic phonons in silver nanoparticles: THz time domain spectroscopy. Sunil Kumar, N. Kamaraju, B. Karthikeyan, M. Tondusson, E. Freysz, and A. K. Sood Journal of Chemical Physics 133, 014502-014506 (2010). Link
Ultrafast switching time and third order nonlinear coefficients of microwave treated single walled carbon nanotube suspensions. N. Kamaraju, Sunil Kumar, B. Karthikeyan, B. Kakade, V. K. Pillai, and A. K. Sood Journal of Nanoscience and Nanotechnology 9, 5550-5554 (2009). Link
Femtosecond carrier dynamics and saturable absorption in graphene suspensions. Sunil Kumar, M. Anija, N. Kamaraju, K. S. Vasu, K.S. Subramanyam, A. K. Sood and C. N. R. Rao Applied Physics Letters 95, 191911-191913 (2009). Link
Double walled carbon nanotubes as ultrafast optical switches. N. Kamaraju, Sunil Kumar, Y. A. Kim, T. Hayashi, H. Muramatsu, M. Endo, and A. K. Sood Applied Physics Letters 95, 081106-081108 (2009). Link
Ultrafast electron dynamics and cubic optical nonlinearity of free standing thin film of double walled carbon nanotubes. N. Kamaraju, Sunil Kumar, B. Karthikeyan, A. Moravsky, R. O. Lutfy, and A. K. Sood Applied Physics Letters 93, 091903-091905 (2008). Link
Large nonlinear absorption and refraction coefficients of carbon nanotubes estimated from femtosecond Z-scan measurements. N. Kamaraju, Sunil Kumar, A. K. Sood, S. Guha, S. Krishnamurthy, and C. N. R. Rao Applied Physics Letters 91, 251103-251105 (2007). Link
Books/Book Chapters
Photonic Crystal Fibers for THz Applications.
Vikas Kumar, H Mondal and Sunil Kumar
Photonic Crystal Fibers (PCFs) - Advances in Research and Applications, pp 137-182 (2024), (Nova Science Publishers, Inc. New York).
https://doi.org/10.52305/PWCW7505
Ultrafast response of plasmonic nanostructures.
Sunil Kumar and A. K. Sood
Reviews in Plasmonics 2015, pp 131-167 (2016), (Springer International Publishing, AG Switzerland).
https://doi.org/10.1007/978-3-319-24606-2_6
Recent Conference Proceedings
Simulation and developmental status for generation and detection of THz using coherent transition radiation technique in Delhi Light Source. B Karmakar, M Aggarwal, J Karmakar, P Patra, B Sahu, S Sharan, S Ghosh, and Sunil Kumar Journal of Physics: Conference Series 3094, 012014 (2025). https://doi.org/10.1088/1742-6596/3094/1/012014
THz Photocurrent Response from Ultrafast Optically Excited Atomically Thin WS2. N Dhakar, B Kumar, and Sunil Kumar Frontiers in Optics (FiO) 2024, paper id JD4A.56. https://doi.org/10.1364/FIO.2024.JD4A.56
Design and optimization of graphene-based THz polarizer with a high extinction ratio. Anjali, R Varshney, and Sunil Kumar Frontiers in Optics + Laser Science 2023 (FiO+LS), paper id LD1.10. https://doi.org/10.1364/LS.2023.LD1.10
Ultrafast spintronic THz emitters and their optical damage limit. S Kumar and Sunil Kumar 2022 47th International Conference on Infrared, Millimeter and THz Waves (IRMMW-THz). https://doi.org/10.1109/IRMMW-THz50927.2022.9896052
Ellipse field to vector field singularities through diffraction. B Komal, S Deepa, S K Pal, Sunil Kumar, and P Senthilkumaran Proc. SPIE 12126, Fifteenth International Conference on Correlation Optics, 121260J https://doi.org/10.1117/12.2615493
Ultrafast Charge Transfer and p-Plasmon Dynamics in Single-Walled Carbon Nanotubes. A Singh and Sunil Kumar CLEO: Science and Innovations 2021. https://doi.org/10.1364/CLEO_AT.2021.JTh3A.56
Metallic Spintronic Ultrafast THz Emitters: Bi- and Tri-Layer Heterostructures for Intense Broadband THz Pulses. S Kumar and Sunil Kumar 5th IEEE International Conference on Emerging Electronics (ICEE 2020). https://doi.org/10.1109/ICEE50728.2020.9776941
Two interpenetrating hexagonal lattice in clad photonic crystal fiber for THz sensing. V Kumar, R Varshney, and Sunil Kumar 2020 Frontiers in Optics / Laser Science. https://doi.org/10.1364/FIO.2020.FM7B.5
Ultrafast, broadband and tunable THz reflector based on high resistivity silicon. Sunil Kumar, S Kumar, A Nivedan, A Singh, M Tondusson, J Degert, E Abraham, V Freysz, and E Freysz IRMMW-THz, 2020 45th International Conference on Infrared and Millimeter Waves. https://doi.org/10.1109/IRMMW-THz46771.2020.93709503
THz conductivity and photo-induced carrier dynamics in a graphene, MoS2, graphene heterostructure. Sunil Kumar, A Singh, A Nivedan, S Kumar, M Tondusson, J Degert, J Oberle, S J Yun, Y H Lee, and E Freysz IRMMW-THz, 2020 45th International Conference on Infrared and Millimeter Waves. https://doi.org/10.1109/IRMMW-THz46771.2020.93708624
Enhanced transient THz response in TMDC heterostructures. Sunil Kumar, A Singh, A Nivedan, S Kumar, M Tondusson, J Degert, J Oberle, S J Yun, Y H Lee, and E Freysz IRMMW-THz, 2020 45th International Conference on Infrared and Millimeter Waves. https://doi.org/10.1109/IRMMW-THz46771.2020.9370975
Nonlinear Interaction of Polarization Singular Beams. B Komal, P Senthilkumaran, and Sunil Kumar ICOL-2019, Springer Proceedings in Physics 258. https://doi.org/10.1007/978-981-15-9259-1_44
Near Zero Flat Dispersion by Hexagonal Patterned Unit Cell in THz Photonic Crystal Fiber. V Kumar, R Varshney, and Sunil Kumar ICOL-2019, Springer Proceedings in Physics 258. https://doi.org/10.1007/978-981-15-9259-1_203
Broadband and flat THz dispersion in biatomic photonic band gap fibers. V Kumar, R Varshney, and Sunil Kumar Workshop on Recent Advances in Photonics (WRAP) (2019). https://doi.org/10.1109/WRAP47485.2019.9013698
Structural Phase Transitions and Thermal Stability in Cu-Based 2D Inorganic-Organic Hybrid Perovskite Systems. M Bochalya, P Kanaujia, G Prakash, and Sunil Kumar AIP Conference Proceedings 2142, 030001 (2019). https://doi.org/10.1063/1.5122329
THz Supercontinuum in the Biatomic Photonic Crystal Fiber. V Kumar, R Varshney, and Sunil Kumar Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) (2019). https://doi.org/10.1109/CLEOE-EQEC.2019.8872721
On the Development of Intense THz sources for nonlinear optics and spectroscopy. Sunil Kumar IEEE 2019 URSI Asia-Pacific Radio Science Conference (AP-RASC) (2019). https://doi.org/10.23919/URSIAP-RASC.2019.8738176
Magnetic Phase Transition in Layered Hybrid Perovskite (C12H25NH3)2CuCl4. M Bochalya, Sunil Kumar, P Kanaujia, and G Prakash AIP Conference Proceedings 1953, 120022 (2018). https://doi.org/10.1063/1.5033087