光学
介电常数
物理
材料科学
吸收(声学)
铋
偶极子
光电子学
凝聚态物理
电介质
量子力学
冶金
作者
Haosen Zhang,Guo Ping Wang,Kedi Wu
出处
期刊:Optics Letters
[The Optical Society]
日期:2024-07-30
卷期号:49 (16): 4654-4654
摘要
We present a novel, to the best of our knowledge, magneto-optical (MO) metasurface composed of a bismuth iron garnet (BIG) nanocube array, designed to achieve near-perfect absorption through quasi-bound states in the continuum ( Q BICs). This metasurface supports a stable Q BIC mode induced by MO-induced permittivity terms that break the symmetry of the permittivity tensors, corresponding to a longitudinal electric dipole (ED) mode. By integrating graphene to introduce material loss, the absorption reaches 99.6% at a wavelength of 1512.3 nm with a Q factor of 9440, despite monolayer graphene’s inherent absorption being only 2.3%. The inherent transverse ED background mode, with high reflection and low Q , helps decrease the radiative loss of the Q BIC mode, allowing the structure to surpass the 50% absorption limit. This approach offers a simplified pathway for designing high- Q metasurface perfect absorbers, with potential applications in optical switches and modulators.
科研通智能强力驱动
Strongly Powered by AbleSci AI