Design of resonant cavity thin film structures with complex active layers
Journal of the Optical Society of America B: Optical Physics
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.
Optica Publishing Group
Sarangan, Andrew M., "Design of resonant cavity thin film structures with complex active layers" (2020). Electro-Optics and Photonics Faculty Publications. 128.