Thumbnail Image
Publication

Ultra-thin perfect absorber employing a tunable phase change material

Kats, Mikhail A.
; 
Sharma, Deepika
; 
Qazilbash, M. M.
Abstract
We show that perfect absorption can be achieved in a system comprising a single lossy dielectric layer of thickness much smaller than the incident wavelength on an opaque substrate by utilizing the nontrivial phase shifts at interfaces between lossy media. This design is implemented with an ultra-thin (∼λ/65) vanadium dioxide (VO2) layer on sapphire, temperature tuned in the vicinity of the VO2 insulator-to-metal phase transition, leading to 99.75% absorption at λ = 11.6 μm. The structural simplicity and large tuning range (from ∼80% to 0.25% in reflectivity) are promising for thermal emitters, modulators, and bolometers.
Description
Date
2012-11-01
Journal Title
Journal ISSN
Volume Title
Publisher
AIP Publishing
Collections
Physics
Show all metadata
Download Dataset
Files
Thumbnail Image
Ultra_thin_perfect_absorber_employing_a_tunable_phase_change_material.pdf
Adobe PDF, 1.29 MB
Rights Holder
Usage License
Embargo
Research Projects
Organizational Units
Journal Issue
Keywords
Citation
Advisor
Department
Physics
DOI
https://doi.org/10.1063/1.4767646
URI
https://scholarworks.wm.edu/handle/internal/887
Embedded videos