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Passive analysis of a prism-like folded microcavity of a surface-emitting laser diode

In this paper, passive analysis of a prism-like folded microcavity of a surface-emitting laser diode, which can play an essential role in the development of compact laser sources with a low gain threshold, is presented. At first, dispersion of a few potentially interesting modes in the cavity with perfectly reflecting metallic mirrors is considered. Subsequently, the impact of two kinds of mirrors made in the form of a distributed Bragg reflector (DBR) on the mode dispersion of a chosen mode is investigated. The first mirror consists of three periods of the Si/SiO2 stack deposited on GaAs substrate, while the second one is composed of over a dozen of GaAs/Al0.3Ga0.7As layers to get similar reflectivity. Eventually, one-dimensional electromagnetic analysis of a given transverse mode propagating along cavity is investigated to get resonant frequencies and cavity losses.