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Whispering Gallery Modes at THz
Author(s) -
Prabhu Shriganesh S.,
Achanta Venu Gopal
Publication year - 2020
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201900973
Subject(s) - terahertz radiation , whispering gallery wave , resonator , materials science , optics , optoelectronics , whispering gallery , q factor , radiation , window (computing) , infrared , physics , computer science , operating system
Whispering gallery modes (WGM) offer strong confinement of electromagnetic radiation to specific resonances supported by the geometry of the resonator. In fact, highest ever quality factors are reported in optical and near‐infrared WGMs along with their applications. Terahertz (THz) radiation offers a unique spectroscopic window to probe materials and has applications in security, sensing, and telecommunication. WGMs at THz have untapped potential for light–matter interaction studies and wide‐ranging applications. In this review, an educational overview of WGMs is given, followed by a review of the THz WGMs and their applications.