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Polariton condensation in an optically induced two-dimensional potential

Polariton condensation in an optically induced two-dimensional potential
Polariton condensation in an optically induced two-dimensional potential
We demonstrate experimentally the condensation of exciton polaritons through optical trapping. The nonresonant pump profile is shaped into a ring and projected to a high quality factor microcavity where it forms a two-dimensional repulsive optical potential originating from the interactions of polaritons with the excitonic reservoir. Increasing the population of particles in the trap eventually leads to the emergence of a confined polariton condensate that is spatially decoupled from the decoherence inducing reservoir, before any buildup of coherence on the excitation region. In a reference experiment, where the trapping mechanism is switched off by changing the excitation intensity profile, polariton condensation takes place for excitation densities more than two times higher and the resulting condensate is subject to much stronger dephasing and depletion processes.
1098-0121
Askitopoulos, A.
7ccee4f4-5ea2-408f-beb3-3ff5b281f4e4
Ohadi, H.
08639b57-7cae-498a-afd2-dbfd5d738cd2
Kavokin, A. V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Hatzopoulos, Z.
4ee394c3-9399-41e2-ab9b-2ddab346bd41
Savvidis, P. G.
9922c8cf-9504-4949-822c-767cdcad58be
Lagoudakis, P. G.
ea50c228-f006-4edf-8459-60015d961bbf
Askitopoulos, A.
7ccee4f4-5ea2-408f-beb3-3ff5b281f4e4
Ohadi, H.
08639b57-7cae-498a-afd2-dbfd5d738cd2
Kavokin, A. V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Hatzopoulos, Z.
4ee394c3-9399-41e2-ab9b-2ddab346bd41
Savvidis, P. G.
9922c8cf-9504-4949-822c-767cdcad58be
Lagoudakis, P. G.
ea50c228-f006-4edf-8459-60015d961bbf

Askitopoulos, A., Ohadi, H., Kavokin, A. V., Hatzopoulos, Z., Savvidis, P. G. and Lagoudakis, P. G. (2013) Polariton condensation in an optically induced two-dimensional potential. Physical Review B, 88 (4), [041308(R)]. (doi:10.1103/PhysRevB.88.041308).

Record type: Article

Abstract

We demonstrate experimentally the condensation of exciton polaritons through optical trapping. The nonresonant pump profile is shaped into a ring and projected to a high quality factor microcavity where it forms a two-dimensional repulsive optical potential originating from the interactions of polaritons with the excitonic reservoir. Increasing the population of particles in the trap eventually leads to the emergence of a confined polariton condensate that is spatially decoupled from the decoherence inducing reservoir, before any buildup of coherence on the excitation region. In a reference experiment, where the trapping mechanism is switched off by changing the excitation intensity profile, polariton condensation takes place for excitation densities more than two times higher and the resulting condensate is subject to much stronger dephasing and depletion processes.

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Published date: 29 July 2013

Identifiers

Local EPrints ID: 430553
URI: http://eprints.soton.ac.uk/id/eprint/430553
ISSN: 1098-0121
PURE UUID: cc97428e-fb3d-4234-a695-ce839bc71660

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Date deposited: 03 May 2019 16:30
Last modified: 03 May 2019 16:30

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