Phonon dynamics in novel materials and hybrid structures

Sathyan, Sandeep; Cardozo de Oliveira, Edson R.; Carreira, Santiago; Papatryfonos, Konstantinos; Morassi, Martina; Lemaître, Aristide; Vensaus, Priscila; Xiang, Chushuang; Steren, Laura B.; Briatico, Javier; Soler-Illia, Galo J. A. A.; Lanzillotti-Kimura, Norberto Daniel

doi:10.1117/12.3022008

Advances in Ultrafast Condensed Phase Physics IV 2024

DOI: 10.1117/12.3022008

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Phonon dynamics in novel materials and hybrid structures

Sandeep Sathyan,

Edson R. Cardozo de Oliveira,

Santiago Carreira

et al.

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Low‐Defect Quantum Dot Lasers Directly Grown on Silicon Exhibiting Low Threshold Current and High Output Power at Elevated Temperatures

Papatryfonos,

Girard,

Tang

et al. 2024

Advanced Photonics Research

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The direct growth of III‐V materials on silicon is a key enabler for developing monolithically integrated lasers, offering substantial potential for ultradense photonic integration in vital communications and computing technologies. However, the III‐V/Si lattice and thermal expansion mismatch pose significant hurdles, leading to defects that degrade lasing performance. This study overcomes this challenge, demonstrating InAs/GaAs‐on‐Si lasers that perform on par with top‐tier lasers on native GaAs substrates. This is achieved through a newly developed epitaxial approach comprising a series of rigorously optimized growth strategies. Atomic‐resolution scanning tunneling microscopy and spectroscopy experiments reveal exceptional material quality in the active region and elucidate the impact of each growth strategy on defect dynamics. The optimized III‐V‐on‐silicon ridge‐waveguide lasers demonstrate a continuous‐wave threshold current as low as 6 mA and high‐temperature operation reaching 165 °C. At 80 °C, critical for data center applications, they maintain a 12 mA threshold and 35 mW output power. Furthermore, lasers fabricated on both Si and GaAs substrates using identical processes exhibit virtually identical average threshold current. By eliminating the performance limitations associated with the GaAs/Si mismatch, this study paves the way for robust and high‐density integration of a broad spectrum of critical III‐V photonic technologies into the silicon ecosystem.

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Low‐Defect Quantum Dot Lasers Directly Grown on Silicon Exhibiting Low Threshold Current and High Output Power at Elevated Temperatures

Papatryfonos,

Girard,

Tang

et al. 2024

Advanced Photonics Research

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show abstract

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Phonon dynamics in novel materials and hybrid structures

Cited by 1 publication

References 20 publications

Low‐Defect Quantum Dot Lasers Directly Grown on Silicon Exhibiting Low Threshold Current and High Output Power at Elevated Temperatures

Low‐Defect Quantum Dot Lasers Directly Grown on Silicon Exhibiting Low Threshold Current and High Output Power at Elevated Temperatures

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