Observation of excitonic super-radiance in quantum well structures and its application for laser cooling of solids

Iman Hassani Nia; David Weinberg; Skylar Wheaton; Emily A Weiss; Hooman Mohseni

doi:10.1117/12.2211982

Observation of excitonic super-radiance in quantum well structures and its application for laser cooling of solids

Iman Hassani Nia, David Weinberg, Skylar Wheaton, Emily A Weiss, Hooman Mohseni

Northwestern University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Excitons, bound electron-hole pairs, possess distinct physical properties from free electrons and holes that can be employed to improve the performance of optoelectronic devices. In particular, the signatures of excitons are enhanced optical absorption and radiative emission. These characteristics could be of major benefit for the laser cooling of semiconductors, a process which has stringent requirements on the parasitic absorption of incident radiation and the internal quantum efficiency. Here we experimentally demonstrate the dominant ultrafast excitonic super-radiance of our quantum well structure from 78 K up to room temperature. The experimental results are followed by our detailed discussions about the advantages and limitations of this method.

Original language	English
Title of host publication	Optical and Electronic Cooling of Solids
Publisher	SPIE
Volume	9765
ISBN (Electronic)	9781510600003
DOIs	https://doi.org/10.1117/12.2211982
Publication status	Published - 2016
Event	Optical and Electronic Cooling of Solids - San Francisco, United States Duration: Feb 17 2016 → Feb 18 2016

Other

Other	Optical and Electronic Cooling of Solids
Country	United States
City	San Francisco
Period	2/17/16 → 2/18/16

Keywords

Carrier density
Excitonic super-radiance
Excitons
Quantum wells
Radiative lifetime

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

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Hassani Nia, I, Weinberg, D, Wheaton, S, Weiss, EA & Mohseni, H 2016, Observation of excitonic super-radiance in quantum well structures and its application for laser cooling of solids. in Optical and Electronic Cooling of Solids. vol. 9765, 97650J, SPIE, Optical and Electronic Cooling of Solids, San Francisco, United States, 2/17/16. https://doi.org/10.1117/12.2211982

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title = "Observation of excitonic super-radiance in quantum well structures and its application for laser cooling of solids",

abstract = "Excitons, bound electron-hole pairs, possess distinct physical properties from free electrons and holes that can be employed to improve the performance of optoelectronic devices. In particular, the signatures of excitons are enhanced optical absorption and radiative emission. These characteristics could be of major benefit for the laser cooling of semiconductors, a process which has stringent requirements on the parasitic absorption of incident radiation and the internal quantum efficiency. Here we experimentally demonstrate the dominant ultrafast excitonic super-radiance of our quantum well structure from 78 K up to room temperature. The experimental results are followed by our detailed discussions about the advantages and limitations of this method.",

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year = "2016",

doi = "10.1117/12.2211982",

language = "English",

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T1 - Observation of excitonic super-radiance in quantum well structures and its application for laser cooling of solids

AU - Hassani Nia, Iman

AU - Weinberg, David

AU - Wheaton, Skylar

AU - Weiss, Emily A

AU - Mohseni, Hooman

PY - 2016

Y1 - 2016

N2 - Excitons, bound electron-hole pairs, possess distinct physical properties from free electrons and holes that can be employed to improve the performance of optoelectronic devices. In particular, the signatures of excitons are enhanced optical absorption and radiative emission. These characteristics could be of major benefit for the laser cooling of semiconductors, a process which has stringent requirements on the parasitic absorption of incident radiation and the internal quantum efficiency. Here we experimentally demonstrate the dominant ultrafast excitonic super-radiance of our quantum well structure from 78 K up to room temperature. The experimental results are followed by our detailed discussions about the advantages and limitations of this method.

AB - Excitons, bound electron-hole pairs, possess distinct physical properties from free electrons and holes that can be employed to improve the performance of optoelectronic devices. In particular, the signatures of excitons are enhanced optical absorption and radiative emission. These characteristics could be of major benefit for the laser cooling of semiconductors, a process which has stringent requirements on the parasitic absorption of incident radiation and the internal quantum efficiency. Here we experimentally demonstrate the dominant ultrafast excitonic super-radiance of our quantum well structure from 78 K up to room temperature. The experimental results are followed by our detailed discussions about the advantages and limitations of this method.

KW - Carrier density

KW - Excitonic super-radiance

KW - Excitons

KW - Quantum wells

KW - Radiative lifetime

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