45 citations · 148 across the 9 of their papers we have counts for
4 papers · 1 filter
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…
Compact spectrometer based on disordered multi-mode interferometer
Ankit Poudel, Pravin Bhattarai, Rijan Maharjan +3
We demonstrate a compact (40 m 260 m) spectrometer based on multimode interference aided by scattering of light from random SiO-filled hole arrays on a silicon-o…
Determining size of an optically trapped particle via modulated Raman spectroscopy
Rohin Sharma, Anusa Thapa, Rijan Maharjan +1
The average Raman signal power obtained in a modulated optical trap is dependent on the Brownian motion - therefore hydrodynamic properties of the trapped particle. Hence, in addit…
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…