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1 April 2022 Self-induced ultrafast electron-hole plasma temperature oscillations in nanowire lasers
Andreas Thurn, Jochen Bissinger, Paul Schmiedeke, Stefan Meinecke, Sang Soon Oh, Weng W. Chow, Kathy Lüdge, Gregor Koblmüller, Jonathan J. Finley
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Proceedings Volume PC11995, Physics and Simulation of Optoelectronic Devices XXX; PC119950A (2022) https://doi.org/10.1117/12.2615632
Event: SPIE OPTO, 2022, San Francisco, California, United States
Abstract
Nanowire lasers can be monolithically and site-selectively integrated onto silicon photonic circuits. To assess their full potential for ultrafast opto-electronic devices, a detailed understanding of their lasing dynamics is crucial. However, the roles played by their resonator geometry and the microscopic processes that mediate energy exchange between the photonic, electronic, and phononic systems are largely unexplored. Here, we apply femtosecond pump-probe spectroscopy to show that GaAs-AlGaAs core-shell nanowire lasers exhibit unexpected non-equilibrium dynamics occurring over few picosecond timescales. As we will show, these dynamics are intricately linked to the strong interaction between the lasing mode and the gain material arising from their wavelength-scale dimensions. We anticipate that our results will lead to new approaches for ultrafast intensity and phase modulation of chip-integrated nanoscale semiconductor lasers.
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Andreas Thurn, Jochen Bissinger, Paul Schmiedeke, Stefan Meinecke, Sang Soon Oh, Weng W. Chow, Kathy Lüdge, Gregor Koblmüller, and Jonathan J. Finley "Self-induced ultrafast electron-hole plasma temperature oscillations in nanowire lasers", Proc. SPIE PC11995, Physics and Simulation of Optoelectronic Devices XXX, PC119950A (1 April 2022); https://doi.org/10.1117/12.2615632
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KEYWORDS
Ultrafast phenomena
Nanowires
Plasma
Semiconductors
Silicon
Silicon photonics
Spectroscopy
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