Title

Design of resonant cavity thin film structures with complex active layers

Document Type

Article

Publication Date

11-1-2020

Publication Source

Journal of the Optical Society of America B: Optical Physics

Abstract

A systematic approach to designing resonant cavity distributed Bragg reflector (DBR) structures with complex-index active regions is developed in this paper. The technique is based on the effective reflectance index of multilayer thin films. While the design of DBR structures with real refractive index films is quite straightforward, the use of a complex refractive index in the cavity requires a different approach. In this paper, we show that a complex active region requires an asymmetric reflector geometry along with a separate phase compensator. This technique is illustrated using phase change materials and metals in the resonant cavity.

Inclusive pages

3461-3468

ISBN/ISSN

0740-3224; 1520-8540

Publisher

Optica Publishing Group

Volume

37

Issue

11

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