氣相沉積具負折射率之銀奈米結構薄膜

Vapor-deposited Nanostructured Silver Film with Negative Refractive Index

任貽均(Yi-Jun Jen) ； 游竟維(Ching-Wei Yu) ； 林晉德(Chin-Te Lin)

《光學工程》 107期 (2009/06) Pp. 14-22

https://doi.org/10.30011/OE.200906.0008

摘要

本研究利用斜向角度沉積法製鍍銀奈米結構氣相沉積薄膜；當薄膜以s極光及p偏極光正向入射銀膜時會激發出橫態與縱態的電漿模態，進而造成穿透與反射係數的非均向性，利用分離干涉儀量測可測得該非均向穿透與反射係數，並驗證銀奈米柱結構薄膜在可見光具有負的折射率。

關鍵字

銀奈米柱結構 ； 負折射率 ； 表面電漿共振 ； 氣相沉積

並列摘要

Vapor-deposited nanostructured silver film was fabricated by using oblique angle depositon technique. When a silver NRA is illuminated by s-polarized and p-polarized light, the transverse plasmon and the longitudinal plasmon modes are excited, respectively. The anisotropic transmission and reflection coefficients of the silver film were measured by walk-off interferometer. The equivalent refractive indices of the silver film were demonstrated to be negative over the visible regime.

並列關鍵字

Silver nanorod array ； negative refractive index ； plasmon resonance ； vapor deposition