Membrane quantum well waveguide lasers

Apostolopoulos, Vasilis, Klokkou, Nicholas, Richardson, Stephen C., Jetter, Michael, Bek, Roman, Michler, Peter, Gorecki, Jon, Ghatak, Ananya and Makris, Konstantinos G. (2025) Membrane quantum well waveguide lasers. Rattunde, Marcel (ed.) In Vertical External Cavity Surface Emitting Lasers (VECSELs) XIV. vol. 13346, SPIE. p. 20 . (doi:10.1117/12.3042966).

Abstract

Key elements for advanced all-optical photonic systems are microsources of coherent light and light amplifiers that can be readily integrated and offer tunability. In this study, we investigate a photonic device capable of flexibly and tunably pumping and potentially amplifying optical signals. Specifically, we focus on coherent laser arrays operating within epitaxially grown semiconductor membrane quantum wells. These laser arrays are designed in a lateral emission geometry, functioning as waveguide lasers with end mirrors formed by the cleaved membranes. We analyze the emission characteristics of the laser arrays and we find that adjacent lasers in the array are coherent and coherence is a function of pump power. Additionally, we demonstrate how emission and coherence can be controlled using a digital micromirror device. When we adjust the position and shape of the pump illumination, we manage to switch on and off coherence and select the phase of the adjacent cavities.

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Contributors

Author: Vasilis Apostolopoulos

Author: Nicholas Klokkou

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