Article Dans Une Revue Frontiers in Physics Année : 2019

Study of Si-based GeSn optically pumped lasers with micro-disk and ridge waveguide structures

Résumé

A silicon-based monolithic laser has long been desired. Recent demonstration of lasing from direct bandgap group-IV alloy GeSn has opened up a completely new approach that is different from the traditional III-V integration on Si. In this study, high-quality GeSn samples were grown using a unique spontaneous Sn-enhanced growth recipe with an Sn composition as high as ∼20.0%. GeSn lasers based on waveguide Fabry-Pérot and micro-disk cavities were fabricated and characterized. The waveguide features better local heat dissipation, while the micro-disk offers stronger optical confinement plus strain relaxation. The maximum operating temperature of 260 K was achieved from a waveguide laser, and a threshold of 108 kW/cm 2 at 15 K was achieved from a micro-disk laser. A peak lasing wavelength of up to 3.5 µm was obtained with a 100-µm-wide ridge waveguide laser.
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cea-04782508 , version 1 (14-11-2024)

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Wei Du, Quang M Thai, Jeremie Chrétien, Mathieu Bertrand, Lara Casiez, et al.. Study of Si-based GeSn optically pumped lasers with micro-disk and ridge waveguide structures. Frontiers in Physics, 2019, 7, pp.147. ⟨10.3389/fphy.2019.00147⟩. ⟨cea-04782508⟩
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