Mode-selective Absorption for Spectrum Shaping
- 10.2991/cnci-19.2019.50How to use a DOI?
- Spectrum shaping, asymmetric dielectric cavity, mode-selective absorption.
We report on realization of a spectrum shaping approach using mechanism of mode-selective absorption in a thin-film layered structure. Ultra-thin lossy films are inserted in the asymmetrical dielectric cavity at the location of nodes or antinodes of standing wave mode to reserve or absorb the energy of certain wavelengths. This layer structure can be physically regarded as the limit case of photonic crystal with limited width of forbidden band. The wavelength range and width of forbidden band can be precisely designed by tuning the thickness of each layer. The reflection spectrum is shaped into a broad rectangular flat-bottom feature by placing the ultra-thin absorber at the antinode of standing wave mode of dielectric layer. This is demonstrated experimentally via a fabricated sample. Reflection peak is also discussed theoretically by placing the absorbers at the nodes instead of antinodes to shape the reflection spectrum into a narrow peak in the desired wavelength range. The principle of this spectral shaping method is universal for the entire electromagnetic waves. It is applicable on the other fields such as the physical coloration, broadband absorption devices of energy harvest and infrared detector.
- © 2019, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - De He AU - Zhijun Liu PY - 2019/05 DA - 2019/05 TI - Mode-selective Absorption for Spectrum Shaping BT - Proceedings of the 2019 International Conference on Computer, Network, Communication and Information Systems (CNCI 2019) PB - Atlantis Press SP - 348 EP - 353 SN - 2352-538X UR - https://doi.org/10.2991/cnci-19.2019.50 DO - 10.2991/cnci-19.2019.50 ID - He2019/05 ER -