Quantum coherence induces pulse shape modification in a semiconductor optical amplifier at room temperature

Nature Communications
Mirco KolarczikUlrike Woggon

Abstract

Coherence in light-matter interaction is a necessary ingredient if light is used to control the quantum state of a material system. Coherent effects are firmly associated with isolated systems kept at low temperature. The exceedingly fast dephasing in condensed matter environments, in particular at elevated temperatures, may well erase all coherent information in the material at timescales shorter than a laser excitation pulse. Here we show for an ensemble of semiconductor quantum dots that even in the presence of ultrafast dephasing, for suitably designed condensed matter systems quantum-coherent effects are robust enough to be observable at room temperature. Our conclusions are based on an analysis of the reshaping an ultrafast laser pulse undergoes on propagation through a semiconductor quantum dot amplifier. We show that this pulse modification contains the signature of coherent light-matter interaction and can be controlled by adjusting the population of the quantum dots via electrical injection.

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Citations

Aug 24, 2016·Nano Letters·Florian WerschlerDenis V Seletskiy
Sep 30, 2016·Topics in Current Chemistry·Lorenzo SansaloneJaume Garcia-Amorós
Sep 23, 2014·Nature Communications·A CapuaJ P Reithmaier
Feb 13, 2016·Optics Letters·R M ArkhipovN N Rosanov
Oct 22, 2016·Physical Review Letters·Takeshi SuzukiSteven T Cundiff
Jan 22, 2015·Optics Express·N B GrosseU Woggon
Oct 1, 2017·Scientific Reports·R M ArkhipovN N Rosanov
Aug 17, 2018·Optics Express·Lorenzo Luigi ColumboMariangela Gioannini
Aug 29, 2020·Nature Communications·Jürgen RaabMiriam S Vitiello
Dec 25, 2015·Optics Express·Akhilesh Kumar MishraGadi Eisenstein
Jan 15, 2021·Scientific Reports·Rostislav ArkhipovNikolay Rosanov

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Methods Mentioned

BETA
infrared spectroscopy

Software Mentioned

SciLab
FROSCH

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