Silver/silicon dioxide/silver sandwich films in the blue-to-red spectral regime with negative-real refractive index

Yi Jun Jen, Akhlesh Lakhtakia, Ching Wei Yu, Jheng Jie Jhou, Wei Hao Wang, Meng Jie Lin, Huang Ming Wu, Hung Sheng Liao

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Abstract

Sandwich films comprising arrays of silver/silicon-dioxide/silver nanosandwiches were grown by the oblique angle deposition technique. For normally incident light, these films present a negative-real refractive index (NRRI) over almost the entire visible regime, with quite high transparency and figures of merit, regardless of the orientation of the incident electric field. A broad distribution of nanosandwich sizes is responsible for the breadth of the NRRI spectral regime.

Original languageEnglish (US)
Article number181117
JournalApplied Physics Letters
Volume99
Issue number18
DOIs
StatePublished - Oct 31 2011

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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