45 citations · 148 across the 9 of their papers we have counts for
9 papers
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…
Intermittent dilation and its coupling to stress in discontinuous shear thickening suspensions
Rijan Maharjan, Ethan O'Reilly, Thomas Postiglione +2
We investigate dilation-induced surface deformations in a Discontinuous Shear Thickening (DST) suspension to determine the relationship between dilation and stresses in DST. Video…
An effective packing fraction for better resolution near the critical point of shear thickening suspensions
Rijan Maharjan, Eric Brown
We present a technique for obtaining an effective packing fraction for discontinuous shear thickening suspensions near a critical point. It uses a measurable quantity that diverges…
System-spanning dynamically jammed region in response to impact of cornstarch and water suspensions
Benjamin Allen, Benjamin Sokol, Shomeek Mukhopadhyay +2
We experimentally characterize the impact response of concentrated suspensions of cornstarch and water. We hypothesize that the dynamically jammed region that propagates ahead of t…
Giant deviation of a relaxation time from generalized Newtonian theory in Discontinuous Shear Thickening suspensions
Rijan Maharjan, Eric Brown
We investigated the transient relaxation of a Discontinuous Shear Thickening suspension of cornstarch in water. We performed 2 types of relaxation experiments starting from a stead…
Constitutive relation for the system-spanning dynamically jammed region in response to impact of cornstarch and water suspensions
Rijan Maharjan, Shomeek Mukhopadhyay, Benjamin Allen +2
We experimentally characterize the impact response of concentrated suspensions consisting of cornstarch and water. We observe that the suspensions support a large normal stress --…