Abstract
We propose a new approach for dynamic holography at optical frequencies utilizing a cavity incorporating an active VO2 layer. By introducing a Bragg reflector at the bottom side of the active cavity, it is possible to obtain a 180° phase shift between the reflected waves in the cold and hot states of the VO2, while maintaining the reflectivity constant at ∼60%. Utilizing this property, we propose and analyze a reconfigurable metasurface which can realize tunable binary holography at optical frequencies. We study the potential performances of such reconfigurable hologram and their sensitivity to variations in the wavelength, polarization and illumination angle. We also show that when tuned to the proper temperature this device can serve as broad-angle perfect absorber.
Original language | English (US) |
---|---|
Article number | 9147022 |
Journal | IEEE Journal of Selected Topics in Quantum Electronics |
Volume | 27 |
Issue number | 1 |
DOIs | |
State | Published - Jan 1 2021 |
Funding
K. A. acknowledges support from the Office of Naval Research Young Investigator Program (ONR-YIP) Award (N00014-17-1-2425). Manuscript received April 1, 2020; revised July 21, 2020; accepted July 21, 2020. Date of publication July 24, 2020; date of current version August 19, 2020. This work was supported in part by the Binational Science Foundation Grant 2016388. (Corresponding author: Jacob Scheuer.) Tamar Haimov and Jacob Scheuer are with the Department of Physical Electronics, Tel-Aviv University, Tel-Aviv 69978, Israel (e-mail: tamarhaimov12 @gmail.com; [email protected]).
Keywords
- Holography
- Metasurface
- Phase change materials
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering