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Issue 10, 2019
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Room temperature exciton–polariton condensate in an optically-controlled trap

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Abstract

We report experimental studies on the optical properties of an exciton polariton condensate confined in an optically defined trap at room temperature. As a result of the parabolic profile of the optical trap, the polariton condensate redistributes itself in simple harmonic oscillator states, forming an analog of the gravity pendulum. We observed the coexistence of two harmonic oscillator modes in a single trap, which were confirmed to be confined modes connected by longitudinal optical (LO) phonons using Raman spectroscopy. Clear features of mode competition behaviors were observed for these two harmonic oscillators when the injection rate of polaritons was varied. The observed mode competition was successfully simulated by a three-level rate equation model. In addition, as a result of the bosonic stimulation in the trap region, up to ∼88% of the injected polaritons were successfully trapped when polariton lasing takes place.

Graphical abstract: Room temperature exciton–polariton condensate in an optically-controlled trap

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Publication details

The article was received on 02 Nov 2018, accepted on 11 Feb 2019 and first published on 12 Feb 2019


Article type: Paper
DOI: 10.1039/C8NR08839J
Citation: Nanoscale, 2019,11, 4496-4502

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    Room temperature exciton–polariton condensate in an optically-controlled trap

    X. Zhang, Y. Zhang, H. Dong, B. Tang, D. Li, C. Tian, C. Xu and W. Zhou, Nanoscale, 2019, 11, 4496
    DOI: 10.1039/C8NR08839J

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