94 citations · 159 across the 10 of their papers we have counts for
11 papers
Thin film notch filters as platforms for biological image processing
Shaban B. Sulejman, Niken Priscilla, Lukas Wesemann +5
Many image processing operations involve the modification of the spatial frequency content of images. Here we demonstrate object-plane spatial frequency filtering utilizing the ang…
Real time phase imaging with an asymmetric transfer function metasurface
Lukas Wesemann, Jon Rickett, Timothy J. Davis +1
The conversion of phase variations in an optical wavefield into intensity information is of fundamental importance for optical imaging technology including microscopy of biological…
Polarization effect and emission control in asymmetric cross-shaped slot antennas surrounded with periodic corrugations
Amir Djalalian-Assl
I discuss progress in the development of asymmetric cross-shaped plasmonic antennas based on resonant nanoscale apertures surrounded by surface corrugations. By tailoring the apert…
Near-perfect absorber as a subwavelength thickness spatial frequency filter for optical image processing
Lukas Wesemann, Evgeniy Panchenko, Kalpana Singh +4
Spatial frequency filtering is a fundamental enabler of information processing methods in biological and technical imaging. Most filtering methods, however, require either bulky an…
Near-Perfect Absorption of Light by Plasmene Sheets
Qianqian Shi, Timothy U. Connell, Qi Xiao +5
Near-perfect absorbers (NPAs) efficiently absorb visible light with a layered nanostructure that is thinner than the diffusion lengths of photogenerated charge carriers. We overcam…
Plasmonic Hot-Carrier Extraction: Mechanisms of Electron Emission
Charlene Ng, Peng Zeng, Julian A. Lloyd +7
When plasmonic nanoparticles are coupled with semiconductors, highly energetic hot carriers can be extracted from the metal-semiconductor interface for various applications in ligh…