Extra high reflection coating with negative extinction coefficient

Yu Jen Chen, Cheng Chung Lee, Sheng Hui Chen, François Flory

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


This Letter designed an extra high reflection filter by using multilayers with a negative k, commonly referred to as gain layers. The gain layer was fabricated by embedding CdS quantum dots in a dielectric layer. Experimental results indicated that the effective k value is around -0.0008. The associated optical and physical properties were also discussed. The application of gain layers is very forward-looking.

Original languageEnglish
Pages (from-to)3377-3379
Number of pages3
JournalOptics Letters
Issue number17
StatePublished - 1 Sep 2013


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