Wideband High-Reflection Chiral Dielectric Metasurface

Hu, ZhipengZhejiang Univ, Ctr Opt & Electromagnet Res, State Key Lab Modern Opt Instrumentat, Hangzhou 310058, Peoples R China. (författare)

QC 20220308
Compared to natural materials, artificial subwavelength structures can enhance chiroptical effects in a stronger way, and the requirement of low material loss and wideband operation is desired in many situations. Here, we propose an all-dielectric chiral metasurface as a periodic array of centrosymmetric staggered silicon cuboid pairs to achieve strong circular dichroism in a wide band. As a demonstration, the designed chiral metasurface may strongly reflect the chosen circularly polarized light with the spin preserved in the operating wavelength range of 1.51 ti 1.60 mu m while highly transmit (with an efficiency greater than 95%) the opposite circularly polarized light with the spin flipped. Then, two application cases are given for the designed chiral metasurface. A flat chiral meta-lens is constructed to produce wideband focusing in the transmission/reflection side while the disturbing from the opposite circular polarization is well blocked by high reflection/transmission. A chiral Fabry-Perot cavity is also constructed, which has an extremely high quality factor (2.1E4). The proposed method provides an efficient way to produce strong chiroptical effects and has a promising potential for various applications such as signal processing, sensing, radiation and detection.

He, NanZhejiang Univ, Ctr Opt & Electromagnet Res, State Key Lab Modern Opt Instrumentat, Hangzhou 310058, Peoples R China.;Zhejiang Univ, Shanghai Inst Adv Study, Shanghai 200000, Peoples R China. (författare)
Sun, YuweiZhejiang Univ, Ctr Opt & Electromagnet Res, State Key Lab Modern Opt Instrumentat, Hangzhou 310058, Peoples R China. (författare)
Jin, YiZhejiang Univ, Ctr Opt & Electromagnet Res, State Key Lab Modern Opt Instrumentat, Hangzhou 310058, Peoples R China. (författare)
He, SailingKTH,Elektroteknisk teori och konstruktion,Zhejiang-KTH Joint Research Center of Photonics, JORCEP,Zhejiang Univ, Ctr Opt & Electromagnet Res, State Key Lab Modern Opt Instrumentat, Hangzhou 310058, Peoples R China.;Zhejiang Univ, Shanghai Inst Adv Study, Shanghai 200000, Peoples R China.;Royal Inst Technol KTH, Sch Elect Engn, Dept Electromagnet Engn, S-10044 Stockholm, Sweden.(Swepub:kth)u1tir6md (författare)
Zhejiang Univ, Ctr Opt & Electromagnet Res, State Key Lab Modern Opt Instrumentat, Hangzhou 310058, Peoples R China.Zhejiang Univ, Ctr Opt & Electromagnet Res, State Key Lab Modern Opt Instrumentat, Hangzhou 310058, Peoples R China.;Zhejiang Univ, Shanghai Inst Adv Study, Shanghai 200000, Peoples R China. (creator_code:org_t)

Ingår i:Progress In Electromagnetics Research: EMW PUBLISHING172, s. 51-601070-46981559-8985

Av författaren/redakt...: Hu, Zhipeng; He, Nan; Sun, Yuwei; Jin, Yi; He, Sailing

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