2 papers
physics.optics2020
Optical spatial differentiation with suspended subwavelength gratings
Alexios Parthenopoulos, Ali Akbar Darki, Bjarke R. Jeppesen +1
We demonstrate first- and second-order spatial differentiation of an optical beam transverse profile using thin suspended subwavelength gratings. Highly reflective one-dimensional…
cond-mat.mes-hall2018
Suspended silicon nitride thin films with enhanced and electrically tunable reflectivity
Bhagya Nair, Andreas Naesby, Bjarke R. Jeppesen +1
We report on the realization of silicon nitride membranes with enhanced and electrically tunable reflectivity. A subwavelength one-dimensional grating is directly patterned on a su…