Quasi-bound states in the continuum empowering a transmissive terahertz narrowband filter with high Q and a broad sideband free of interferential distortion.
Sign Up to like & getrecommendations! Published in 2024 at "Optics letters"
DOI: 10.1364/ol.524394
Abstract: Most currently available terahertz (THz) narrowband filters contain a metal and a substrate, which introduce absorption loss and spectral fluctuations caused by a Fabry-Perot interference in substrates. To address these issues, we employ quasi-bound states… read more here.
Keywords: states continuum; quasi bound; narrowband; narrowband filter ... See more keywords
Dual UV narrowband filter-based differential detection for long-range extraction of fuel combustion signals
Sign Up to like & getrecommendations! Published in 2025 at "Optics Letters"
DOI: 10.1364/ol.580496
Abstract: The hydroxyl (OH+) radical, with its distinctive 308 nm emission, provides a unique fingerprint for hydrocarbon combustion monitoring. Exploiting the low ultraviolet sky background, OH+-based detection achieves high accuracy without cooling but suffers from narrowband-filter blue… read more here.
Keywords: detection; dual narrowband; filter based; combustion ... See more keywords
OPTIMIZATION OF A REWRITABLE NARROWBAND FILTER IN A SBN:75 CRYSTAL
Sign Up to like & getrecommendations! Published in 2020 at "Progress in Electromagnetics Research C"
DOI: 10.2528/pierc20020501
Abstract: We propose a rewritable optical frequency filter based on a volume Bragg grating recorded by holography on an SBN:75 photorefractive crystal. The theoretical results show the possibility of implementing a narrow-band filter whose reflectance is… read more here.
Keywords: sbn; narrowband filter; filter; filter sbn ... See more keywords