Mr. Lal Krishna A.S. Profile

Lal Krishna A.S.

at Indian Institute of Science Bengaluru

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Author

Publications (10)

Proceedings Article | 13 March 2024 Presentation + Paper

Experimental demonstration of resonant third-harmonic generation using quasi-BIC resonances in silicon elliptical dimer metasurfaces with nanodisk couplers

Urmila Bag, Lal Krishna A. S., Jyothsna K. M., Varun Raghunathan

Proceedings Volume 12897, 1289703 (2024) https://doi.org/10.1117/12.3002169

KEYWORDS: Third harmonic generation, Nonlinear optics

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Proceedings Article | 17 March 2023 Presentation + Paper

Enhanced four wave mixing from MoS2 disks supporting higher-order anapole resonance

Rabindra Biswas, Asish Prosad, Lal Krishna, Varun Raghunathan

Proceedings Volume 12423, 1242308 (2023) https://doi.org/10.1117/12.2650009

KEYWORDS: Molybdenum, Resonators, Resonance enhancement, Four wave mixing, Electric fields, Scattering, Optical resonators, Simulations, Second harmonic generation

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Proceedings Article | 27 May 2022 Presentation + Paper

Focal field engineered infrared-sensitive third-order sum frequency generation microscopy

Jyothsna Konkada Manattayil, Lal Krishna A. S., Hyunmin Kim, Varun Raghunathan

Proceedings Volume 12144, 121440K (2022) https://doi.org/10.1117/12.2621764

KEYWORDS: Microscopy, Sum-frequency generation, Polarization, Infrared imaging

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Proceedings Article | 5 March 2022 Presentation + Paper

Enhanced third harmonic generation in layered guided mode resonant structures using pupil engineered conical excitation

Sruti Menon, Jyothsna K. M., Rabindra Biswas, Asish Prosad, A.S. Lal Krishna, Varun Raghunathan

Proceedings Volume 12011, 1201105 (2022) https://doi.org/10.1117/12.2609869

KEYWORDS: Amorphous silicon, Silicon, Harmonic generation, Optical simulations, Gaussian beams, Resonance enhancement

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Proceedings Article | 5 March 2022 Presentation + Paper

Quasi-BIC resonances in amorphous germanium zero contrast gratings with dual asymmetric step profile for mid infrared frequency up-conversion

Lal Krishna A.S., Jyothsna K. M., Asish Prosad, Rabindra Biswas, Sruti Menon, Varun Raghunathan

Proceedings Volume 12011, 1201104 (2022) https://doi.org/10.1117/12.2609838

KEYWORDS: Mid-IR, Etching, Germanium, FT-IR spectroscopy, Photons, Visible radiation, Signal processing, Objectives, Sum-frequency generation, Reflectivity

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Proceedings Article | 5 March 2022 Presentation + Paper

Enhanced second harmonic generation from vertically stacked multilayer gallium selenide separated by low-index PMMA spacer layer

Rabindra Biswas, Asish Prosad, Lal Krishna A.S., Sruti Menon, Varun Raghunathan

Proceedings Volume 12003, 1200307 (2022) https://doi.org/10.1117/12.2609737

KEYWORDS: Second-harmonic generation, Gases, Polymethylmethacrylate, Image enhancement, Harmonic generation, Gallium, Silicon, Optimization (mathematics), Nonlinear optics, Wave propagation

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Proceedings Article | 5 March 2021 Presentation + Paper

Harmonic generation from 2D materials coupled to resonant metasurfaces

Varun Raghunathan, Jayanta Deka, Lal Krishna, Sruti Menon, Jyothsna K.M., Rabindra Biswas

Proceedings Volume 11688, 116880K (2021) https://doi.org/10.1117/12.2578039

KEYWORDS: Harmonic generation, Dielectric polarization, Second-harmonic generation, Silicon, Diffraction, Nonlinear optics, Gallium, Dielectrics, Chemical vapor deposition

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Proceedings Article | 1 April 2020 Presentation + Paper

Silicon-on-insulator based high-index contrast gratings for resonant enhancement of second harmonic generation from two-dimensional material

Jayanta Deka, Medha Dandu, Lal Krishna A. S., Sruti Menon, Jyothsna K. M., Kausik Majumdar, Varun Raghunathan

Proceedings Volume 11344, 113441Y (2020) https://doi.org/10.1117/12.2555800

KEYWORDS: Nonlinear metamaterials, Silicon, Second-harmonic generation, Harmonic generation, Resonance enhancement, Near field optics, Light sources, Integrated optics, Etching, Diffraction

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Proceedings Article | 4 March 2019 Presentation + Paper

Silicon-nitride-based medium-contrast gratings for resonant fluorescence enhancement in the visible wavelength range

Sruti Menon, Lal Krishna A. S., M. V. N. Surendra Gupta, Ameen E., Bala Pesala, Varun Raghunathan

Proceedings Volume 10928, 1092818 (2019) https://doi.org/10.1117/12.2508778

KEYWORDS: Silicon, Luminescence, Polarization, Refractive index, Rhodamine B, Optical design, Diffraction, Resonance enhancement

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Proceedings Article | 21 February 2018 Paper

High contrast grating based intrinsic fluorescence enhancing substrates for water contamination detection

M. V. N. Surendra Gupta, Ameen E., Sruti Menon, Lal Krishna A. S., Varun Raghunathan, Bala Pesala

Proceedings Volume 10542, 1054214 (2018) https://doi.org/10.1117/12.2289741

KEYWORDS: Luminescence, Water contamination, Industrial chemicals, Finite-difference time-domain method, Bacteria

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Showing 5 of 10 publications

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