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Progress toward high-Q perfect absorption: A Fano antilaser
Cited 31 time in
Web of Science
Cited 36 time in Scopus
- Authors
- Issue Date
- 2015-07
- Publisher
- American Physical Society
- Citation
- Physical Review A - Atomic, Molecular, and Optical Physics, Vol.92 No.1, p. 011802
- Abstract
- Here we propose a route to the high-Q perfect absorption of light by introducing the concept of a Fano antilaser. Based on the drastic spectral variation of the optical phase in a Fano-resonant system, a spectral singularity for scatter-free perfect absorption can be achieved with an order of magnitude smaller material loss. By applying temporal coupled mode theory to a Fano-resonant waveguide platform, we reveal that the required material loss and following absorption Q factor are ultimately determined by the degree of Fano spectral asymmetry. The feasibility of the Fano antilaser is confirmed using a photonic crystal platform, to demonstrate spatiospectrally selective heating. Our results utilizing the phase-dependent control of device bandwidths derive a counterintuitive realization of high-Q perfect conversion of light into internal energy, and thus pave the way for a new regime of absorption-based devices, including switches, sensors, thermal imaging, and optothermal emitters.
- ISSN
- 1050-2947
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Related Researcher
- College of Engineering
- Department of Electrical and Computer Engineering
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