Document Type
Article
Department/Program
Physics
Journal Title
Applied Physics Letters
Pub Date
11-2012
Publisher
AIP Publishing
Volume
101
Issue
22
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.
Recommended Citation
Kats, Mikhail A.; Sharma, Deepika; (...); Qazilbash, M. M.; and et al., Ultra-thin perfect absorber employing a tunable phase change material (2012). Applied Physics Letters, 101(22).
https://doi.org/10.1063/1.4767646
DOI
https://doi.org/10.1063/1.4767646
Publisher Statement
This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Applied Physics Letters 101, 221101 (2012) and may be found at https://doi.org/10.1063/1.4767646 .
