25 citations · 41 across the 9 of their papers we have counts for
6 papers · 1 filter
Geometric Control of Visible Emitter Creation in Hexagonal Boron Nitride by Oblique Ion Irradiation
Sagar Chowdhury, Bhaveshkumar Kamaliya, Ramachandra Bangari +5
Ion irradiation creates optically active defects in wide-bandgap van der Waals materials, yet most approaches tune defect formation by varying the ion species, energy, or fluence w…
Observation of light propagation through a three-dimensional cavity superlattice in a 3D photonic band gap
Manashee Adhikary, Marek Kozon, Ravitej Uppu +1
We experimentally investigate unusual light propagation inside a three-dimensional (3D) superlattice of resonant cavities that are confined within a 3D photonic band gap. Therefore…
Electroabsorption in gated GaAs nanophotonic waveguides
Ying Wang, Ravitej Uppu, Xiaoyan Zhou +6
We report on the analysis of electroabsorption in thin GaAs/AlGaAs nanophotonic waveguides with an embedded -- junction. By measuring the transmission thro…
Deterministic and controllable photonic scattering media via direct laser writing
E. Marakis, R. Uppu, M. L. Meretska +3
Photonic scattering materials, such as biological tissue and white paper, are made of randomly positioned nanoscale inhomogeneities in refractive index that lead to multiple scatte…
Universal Validity Ranges of Diffusion Theory for Light and Other Electromagnetic Waves
Maryna L. Meretska, Ravitej Uppu, Ad Lagendijk +1
The well-known diffusion theory describes propagation of light and electromagnetic waves in complex media. While diffusion theory is known to fail both for predominant forward scat…
Asymmetric Cryptography with Physical Unclonable Keys
Ravitej Uppu, Tom A. W. Wolterink, Sebastianus A. Goorden +4
Secure communication is of paramount importance in modern society. Asymmetric cryptography methods such as the widely used RSA method allow secure exchange of information between p…