Broadband near-infrared reflector based on double-layer subwavelength gratings
نویسندگان
چکیده
A broadband reflector with a reflectance up to 97.8% over 144 nm spectral range from 1476 1620 is proposed by comprising double-layer subwavelength gratings one grating layer embedded in SiO2 layer. An analysis of the resonance leaky modes overlapping shows physical mechanism wide broad high-reflectivity band. The tolerance structural parameter analyzed and variation bandwidth explained combining behaviors two guided mode resonances. high refractive index contrast properties lead good angular that exhibited an insensitivity (~ 11°) at 1550 nm. Overall, may benefit monolithic integration optoelectronic devices.
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ژورنال
عنوان ژورنال: Optical and Quantum Electronics
سال: 2021
ISSN: ['1572-817X', '0306-8919']
DOI: https://doi.org/10.1007/s11082-021-03158-6