Nanophotonic nonlinear and laser devices exploiting bound states in the continuum

The quality factor (Q), describing the rate of energy loss from a resonator, is a defining performance metric for nanophotonic devices. Suppressing cavity radiative losses enables strong nonlinear optical responses or low-power operation to be achieved. Exploiting long-lived, spatially-confined boun...

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Bibliographic Details
Published in:Communications physics 2022-05, Vol.5 (1), p.1-12, Article 106
Main Authors: Hwang, Min-Soo, Jeong, Kwang-Yong, So, Jae-Pil, Kim, Kyoung-Ho, Park, Hong-Gyu
Format: Article
Language:English
Subjects:
639/624/399/1098
639/624/400
Cavity resonators
Copyright
Devices
Energy
Energy dissipation
Lasers
Light
Nanowires
Nonlinear optics
Photonics
Physics
Physics and Astronomy
Q factors
Quantum physics
Radiation
Review Article
Symmetry
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Summary:The quality factor (Q), describing the rate of energy loss from a resonator, is a defining performance metric for nanophotonic devices. Suppressing cavity radiative losses enables strong nonlinear optical responses or low-power operation to be achieved. Exploiting long-lived, spatially-confined bound states in the continuum (BICs) has emerged from the numerous approaches considered as a promising route to boost nanophotonic Q factors. Initial research explored the formation mechanisms of various types of BICs, drawing parallels to topological physics. With these fundamentals now established, we review the recent application of BICs in passive and active nanophotonic devices. Bound states in the continuum, for decades a theoretical curiosity, have more recently found application in nanophotonic platforms due to their high quality factors and spatial confinement. Here, the authors review recent progress in the development of active and passive photonic devices exploiting these properties.
ISSN:2399-3650
2399-3650
DOI:10.1038/s42005-022-00884-5