Vertical cavity surface emitting laser action of an all monolithic ZnO-based microcavity

TL;DR

This paper demonstrates room temperature laser action in a monolithic ZnO-based VCSEL under optical pumping, highlighting the design and growth of high-reflectivity DBRs for UV and blue-green applications.

Contribution

It presents the first all monolithic ZnO-based VCSEL with room temperature operation and details the design and growth of suitable DBRs for UV and blue-green lasers.

Findings

Achieved room temperature laser action in ZnO-based VCSEL

Developed high-reflectivity ZnO and (Zn,Mg)O DBRs

Demonstrated potential for UV and blue-green laser devices

Abstract

We report on room temperature laser action of an all monolithic ZnO-based vertical cavity surface emitting laser (VCSEL) under optical pumping. The VCSEL structure consists of a 2{\lambda} microcavity containing 8 ZnO/Zn(0.92)Mg(0.08)O quantum wells embedded in epitaxially grown Zn(0.92)Mg(0.08)O/Zn(0.65)Mg(0.35)O distributed Bragg reflectors (DBRs). As a prerequisite, design and growth of high reflectivity DBRs based on ZnO and (Zn,Mg)O for optical devices operating in the ultraviolet and blue-green spectral range are discussed.