Dr. Raktim Sarma Profile

Dr. Raktim Sarma

Postdoc Researcher at Sandia National Labs

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Publications (6)

Proceedings Article | 4 October 2023 Presentation + Paper

Photoconductive metasurfaces for near-field terahertz sources and detectors

Lucy Hale, Hyunseung Jung, James Seddon, Raktim Sarma, Sylvain Gennaro, Jayson Briscoe, C. Thomas Harris, Ting Shan Luk, Prasad Iyer, Sadhvikas Addamane, John Reno, Igal Brener, Oleg Mitrofanov

Proceedings Volume 12683, 126830C (2023) https://doi.org/10.1117/12.2681721

KEYWORDS: Terahertz radiation, Near field, Near infrared, Microscopy, Terahertz detection, Spatial resolution, Terahertz sources, Near field optics, Signal detection, Electromagnetic metamaterials, Terahertz spectroscopy

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Proceedings Article | 4 October 2023 Presentation

Near-field imaging of optical resonance modes in silicon metasurfaces using photoelectron microscopy

Alex Boehm, Sylvain Gennaro, Chloe Doiron, Thomas Beechem, Michael Sinclair, Igal Brener, Raktim Sarma, Taisuke Ohta

Proceedings Volume PC12646, PC1264616 (2023) https://doi.org/10.1117/12.2676035

KEYWORDS: Near field optics, Near field, Silicon, Electron microscopy, Optical imaging, Quantum nanophotonics, Quantum fields, Light-matter interactions, Imaging spectroscopy, Resonators

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Proceedings Article | 17 September 2018 Presentation

Voltage tuning of reflectance from a strongly coupled metasurface-semiconductor hybrid structure (Conference Presentation)

Raktim Sarma, Salvatore Campione, Michael Goldflam, Joshua Shank, Sean Smith, Jinhyun Noh, Peide Ye, Michael Sinclair, Ganapathi Subramania, Isaac Ruiz, Stephen Howell, Joel Wendt, Igal Brener

Proceedings Volume 10721, 107211E (2018) https://doi.org/10.1117/12.2321256

KEYWORDS: Reflectivity, Modulation, Beam steering, Dielectric polarization, Electronics, Semiconductors, Gold, Indium gallium arsenide, Doping, Scattering

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Proceedings Article | 17 September 2018 Presentation

Reflectance modulation from a metasurface coupled to intersubband transitions in semiconductor quantum wells using quantum tunneling (Conference Presentation)

Raktim Sarma, Salvatore Campione, Michael Goldflam, Loan Le, M. Lange, Joshua Shank, Michael Wanke, Jinhyun Noh, Peide Ye, Isaac Ruiz, Stephen Howell, Michael Sinclair, Joel Wendt, Igal Brener

Proceedings Volume 10721, 1072123 (2018) https://doi.org/10.1117/12.2321900

KEYWORDS: Quantum wells, Modulation, Reflectivity, Semiconductors, Indium gallium arsenide, Heterojunctions, Optical design, Ultrafast phenomena, Optical modulators, Tunable filters

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Proceedings Article | 24 April 2017 Presentation

Control of energy density inside turbid medium (Conference Presentation)

Raktim Sarma, Alexey Yamilov, Sasha Petrenko, Yaron Bromberg, Hui Cao

Proceedings Volume 10073, 100730Q (2017) https://doi.org/10.1117/12.2251457

KEYWORDS: Control systems, Adaptive optics, Light scattering, Scattering, Waveguides, Wavefronts, Optical engineering, Silicon, Light-matter interactions, Complex systems

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Proceedings Article | 21 May 2014 Paper

On-chip random spectrometer

B. Redding, S. F. Liew, R. Sarma, H. Cao

Proceedings Volume 9101, 910105 (2014) https://doi.org/10.1117/12.2050021

KEYWORDS: Spectroscopy, Scattering, Light scattering, Waveguides, Photonic crystals, Calibration, Sensors, Speckle pattern, Silicon, Spectral calibration

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Showing 5 of 6 publications

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