상세정보
학술지
Switchable Subwavelength Plasmonic Structures with Phase-Change Materials for Reflection-Type Active Metasurfaces in the Visible Region
- 발행일
- 201711
- 출처
- Applied Physics Express, v.10 no.12, pp.1-4
- ISSN
- 1882-0778
- 출판사
- Japan Society of Applied Physics (JSAP), Institute of Physics (IOP)
- 협약과제
- 17MF1200, 디지털 홀로그래픽 테이블탑형 단말 기술 개발, 김진웅
- 초록
- In this work, a switchable plasmonic structure is proposed for reflection-type spatial light modulation in the visible range with subwavelength resolution. This structure is based on a metallic grating in which each resonant cavity couples the incident light into a gap surface plasmon mode and then reflects the light modulated in the cavity. By incorporating an ultrathin layer of the phase-change material Ge2Sb2Te5 at the entrance of the cavity, the optical modulation characteristic of the structure can be switched between two modes. Numerical investigations are conducted to verify the proposed structure, with the focused analysis of two common types of binary modulations: amplitude-only and phase-only modulations.
- KSP 제안 키워드
- Amplitude-only, Focused analysis, Modulation characteristic, Phase Change Material(PCM), Phase-only, Reflection-type, Subwavelength resolution, Surface plasmon(SP), Visible range, Visible region, metallic grating