Coherent control of evanescent waves via beam shaping
Abstract
Evanescent waves are central to many technologies such as near-field imaging that beats the diffraction limit and plasmonic devices. Frustrated total internal reflection (FTIR) is an experimental method commonly used to study evanescent waves. In this paper, we shape the incident beam of the FTIR process with a Mach–Zehnder interferometer and measure light transmittance while varying the path length difference and interferometric visibility. Our results show that the transmittance varies with the path length difference and, thus, the intensity distribution of the shaped beam. Experiment and finite element method simulation produce results that agree. We also show, through simulations, that the transmittance can be controlled via other methods of beam shaping. Our work provides a proof-of-concept demonstration of the coherent control of the FTIR process, which could lead to advancements in numerous applications of evanescent waves and FTIR.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 21, 2022
- Source ID
- 10.1088/2040-8986/ac9f57
Entities
People
- Denys I Bondar
- Jacob M. Leamer
- Nicholas J. Savino
- Ravi Kiran Saripalli
- Ryan T. Glasser
- Wenlei Zhang
Organizations
- Army Research Office
- Defense Advanced Research Projects Agency
- Office of Naval Research