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physics.optics2023
Upconversion of infrared light by graphitic micro-particles due to photo-induced structural modification
Rohin Sharma, Nishma Bhattarai, Rijan Maharjan +3
Recent reports of upconversion and white light emission from graphitic particles warrant an explanation of the physics behind the process. We offer a model, wherein the upconversio…
physics.optics2020
Power and spectral characterization of photonic integrated circuit based axicon like lens
Rijan Maharjan, Sanket Bohora, Pravin Bhattarai +5
We demonstrate an on-chip Silicon-on-Insulator (SOI) axicon etched using a low resolution (200 nm feature size, 250 nm gap) deep-ultraviolet lithographic fabrication. The axicon co…