边带
窄带
太赫兹辐射
失真(音乐)
物理
滤波器(信号处理)
兼容边带传输
宽带
光学
光电子学
工程类
电气工程
微波食品加热
量子力学
CMOS芯片
放大器
作者
Pan Zhou,Kaiyu Wu,Qingkang Wang
摘要
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 in the continuum (BICs) for the design and realization of a substrate-free all-dielectric THz transmissive narrowband filter. Under oblique incidence, the symmetry-protected BICs break and collapse into high-Q transmissive quasi-BIC modes, thereby achieving narrowband filtering. The filter not only minimizes energy loss but also demonstrates a smooth filtering response without an interferential spectral fluctuation associated with the substrate. An experimental high Q value of ∼127 at 4.1 THz with a broad sideband of ∼1.5 THz with transmittance below 10% is achieved.
科研通智能强力驱动
Strongly Powered by AbleSci AI