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Main Title: Pump-Power-Driven Mode Switching in a Microcavity Device and Its Relation to Bose-Einstein Condensation
Author(s): Leymann, H. A. M.
Vorberg, D.
Lettau, T.
Hopfmann, Caspar
Schneider, C.
Kamp, M.
Höfling, S.
Ketzmerick, R.
Wiersig, J.
Reitzenstein, Stephan
Eckardt, A.
Type: Article
Abstract: We investigate the switching of the coherent emission mode of a bimodal microcavity device, occurring when the pump power is varied. We compare experimental data to theoretical results and identify the underlying mechanism based on the competition between the effective gain, on the one hand, and the intermode kinetics, on the other. When the pumping is ramped up, above a threshold, the mode with the largest effective gain starts to emit coherent light, corresponding to lasing. In contrast, in the limit of strong pumping, it is the intermode kinetics that determines which mode acquires a large occupation and shows coherent emission. We point out that this latter mechanism is akin to the equilibrium Bose-Einstein condensation of massive bosons. Thus, the mode switching in our microcavity device can be viewed as a minimal instance of Bose-Einstein condensation of photons. Moreover, we show that the switching from one cavity mode to the other always occurs via an intermediate phase where both modes are emitting coherent light and that it is associated with both superthermal intensity fluctuations and strong anticorrelations between both modes.
Subject(s): photonics
quantum physics
statistical physics
Issue Date: 22-Jun-2017
Date Available: 20-Nov-2020
Language Code: en
DDC Class: 530 Physik
Sponsor/Funder: EC/FP7/EU/615613/External Quantum Control of Photonic Semiconductor Nanostructures/EXQUISITE
DFG, 277974659, FOR 2414: Artificial Gauge Fields and Interacting Topological Phases in Ultracold Atoms
Journal Title: Physical Review X
Publisher: American Physical Society (APS)
Volume: 7
Issue: 2
Article Number: 21045
Publisher DOI: 10.1103/physrevx.7.021045
EISSN: 2160-3308
TU Affiliation(s): Fak. 2 Mathematik und Naturwissenschaften » Inst. Festkörperphysik » AG Optoelektronik und Quantenbauelemente
Appears in Collections:Technische Universität Berlin » Publications

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