Tim Davis

Ultrafast vector imaging of plasmonic skyrmion dynamics with deep subwavelength resolution

Timothy J Davis, David Janoschka, Pascal Dreher, Bettina Frank, Frank-J Meyer zu Heringdorf, Harald Giessen

Journal article  |  2020  |  SCIENCE

Plasmonic skyrmions are an optical manifestation of topological defects in a continuous vector field. Identifying them requires ch..

Selective near-perfect absorbing mirror as a spatial frequency filter for optical image processing

Lukas Wesemann, Evgeniy Panchenko, Kalpana Singh, Enrico Della Gaspera, Daniel E Gomez, Timothy J Davis, Ann Roberts

Journal article  |  2019  |  APL PHOTONICS

Spatial frequency filtering is a fundamental enabler of information processing methods in biological and technical imaging. Most f..

Ultracompact Camera Pixel with Integrated Plasmonic Color Filters

Evgeniy Panchenko, Lukas Wesemann, Daniel E Gomez, Timothy D James, Timothy Davis, Ann Roberts

Journal article  |  2019  |  ADVANCED OPTICAL MATERIALS

Photodetector size imposes a fundamental limit on the amount of information that can be recorded by an image sensor. Compact, high..

Plasmonic Near-Complete Optical Absorption and Its Applications

Charlene Ng, Lukas Wesemann, Evgeniy Panchenko, Jingchao Song, Timothy J Davis, Ann Roberts, Daniel E Gomez

Journal article  |  2019  |  ADVANCED OPTICAL MATERIALS

Near-complete absorption of light has the potential to underpin advances in photodetection, advanced chemistry, coloration of mate..

Metasurfaces with Asymmetric Optical Transfer Functions for Optical Signal Processing

TJ Davis, F Eftekhari, DE Gomez, A Roberts

Journal article  |  2019  |  PHYSICAL REVIEW LETTERS

Metasurface thin films created from arrays of structured optical elements have been shown to perform spatial filtering of optical ..

Precision Plasmonics with Monomers and Dimers of Spherical Gold Nanoparticles: Nonequilibrium Dynamics at the Time and Space Limits

L Schumacher, J Jose, D Janoschka, P Dreher, TJ Davis, M Ligges, R Li, M Mo, S Park, X Shen, S Weathersby, J Yang, X Wang, F Meyer Zu Heringdorf, K Sokolowski-Tinten, S Schluecker

Journal article  |  2019  |  JOURNAL OF PHYSICAL CHEMISTRY C

Monomers and dimers of spherical gold nanoparticles (NPs) exhibit highly uniform plasmonic properties at the single-particle level..

Spatiotemporal Analysis of an Efficient Fresnel Grating Coupler for Focusing Surface Plasmon Polaritons

Daniel Podbiel, Philip Kahl, Bettina Frank, Timothy J Davis, Harald Giessen, Michael Horn-von Hoegen, Frank J Meyer zu Heringdorf

Journal article  |  2019  |  ACS PHOTONICS

Time-resolved photoemission microscopy is used to investigate the spatiotemporal properties of surface plasmon polaritons launched..

Large-Area Nanofabrication of Partially Embedded Nanostructures for Enhanced Plasmonic Hot-Carrier Extraction

Charlene Ng, Peng Zeng, Julian A Lloyd, Debadi Chakraborty, Ann Roberts, Trevor A Smith, Udo Bach, John E Sader, Timothy J Davis, Daniel E Gomez

Journal article  |  2019  |  ACS APPLIED NANO MATERIALS

When plasmonic nanoparticles are coupled with semiconductors, highly energetic hot carriers can be extracted from the metal-semico..

Directing Energy into a Subwavelength Nonresonant Metasurface across the Visible Spectrum

Timothy U Connell, Gus O Bonin, Christopher D Easton, Enrico Della Gaspera, Anthony SR Chesman, Timothy J Davis, Daniel E Gomez

Journal article  |  2019  |  ACS APPLIED ENERGY MATERIALS

Group 10 metals (i.e., Ni, Pd, Pt) catalyze a wide range of chemical transformations, but the weak interaction of their nanopartic..

Plasmene Metasurface Absorbers: Electromagnetic Hot Spots and Hot Carriers

Qianqian Shi, Timothy U Connell, Qi Xiao, Anthony SR Chesman, Wenlong Cheng, Ann Roberts, Timothy J Davis, Daniel E Gomez

Journal article  |  2019  |  ACS PHOTONICS

Light-matter interactions are extremely important, as they sustain life on Earth and can be tailored for diverse applications in a..