[5p-A410-1~13] 4.1 Plasmonics

▲ [5p-A410-3] VSRR for isotropic absorption and nanophotonic sensor

〇(M2)Wei Hou Lee¹, Jia Wern Chen¹, Chung Chung Ling¹, Pin Chieh Wu², Chun Yen Liao¹, Din Ping Tsai^1,2 (1.Natl. Taiwan Univ., 2.Academia Sinica)

Keywords:metamaterial, plsmonic, sensor

We experimentally and numerically demonstrate a VSRR-based isotropic perfect absorber working at near-infrared region. We first show that a nearly 100% absorption can be achieved in a single VSRR-based perfect absorber. Four-VSRRs are subsequently merged into a unit cell for the demonstration of isotropic perfect absorber which is examined by changing the polarization angles and angle of incidences. The absorption can be maintained at a very high intensity even when the incident angle is up to 60° for both TE- and TM-polarized illumination. Furthermore, this proposed VSRR based perfect
absorber can also be applied as a refractive index sensor with improved sensing performance and therefore provides an efficient way for biosensor and optoelectronics applications.