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Main Title: A quantum optical study of thresholdless lasing features in high-β nitride nanobeam cavities
Author(s): Jagsch, Stefan T.
Triviño, Noelia Vico
Lohof, Frederik
Callsen, Gordon
Kalinowski, Stefan
Rousseau, Ian M.
Barzel, Roy
Carlin, Jean-François
Jahnke, Frank
Butté, Raphaël
Gies, Christopher
Hoffmann, Axel
Grandjean, Nicolas
Reitzenstein, Stephan
Type: Article
Language Code: en
Abstract: Exploring the limits of spontaneous emission coupling is not only one of the central goals in the development of nanolasers, it is also highly relevant regarding future large-scale photonic integration requiring energy-efficient coherent light sources with a small footprint. Recent studies in this field have triggered a vivid debate on how to prove and interpret lasing in the high-β regime. We investigate close-to-ideal spontaneous emission coupling in GaN nanobeam lasers grown on silicon. Such nanobeam cavities allow for efficient funneling of spontaneous emission from the quantum well gain material into the laser mode. By performing a comprehensive optical and quantum-optical characterization, supported by microscopic modeling of the nanolasers, we identify high-β lasing at room temperature and show a lasing transition in the absence of a threshold nonlinearity at 156 K. This peculiar characteristic is explained in terms of a temperature and excitation power-dependent interplay between zero-dimensional and two-dimensional gain contributions.
Issue Date: 8-Feb-2018
Date Available: 11-May-2020
DDC Class: 530 Physik
Subject(s): high-β nanolasers
spontaneous emission coupling
Sponsor/Funder: EC/FP7/615613/EU/External Quantum Control of Photonic Semiconductor Nanostructures/EXQUISITE
Journal Title: Nature Communications
Publisher: Springer Nature
Publisher Place: London
Volume: 9
Article Number: 564
Publisher DOI: 10.1038/s41467-018-02999-2
EISSN: 2041-1723
Appears in Collections:AG Optoelektronik und Quantenbauelemente » Publications

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