2011
DOI: 10.1063/1.3650268
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Polariton lasing in a hybrid bulk ZnO microcavity

Abstract: International audienceWe demonstrate polariton lasing in a bulk ZnO planar microcavity under non-resonant optical pumping at a small negative detuning (delta~-1/6 the 130 meV vacuum Rabi splitting) and a temperature of 120 K. The strong coupling regime is maintained at lasing threshold since the coherent nonlinear emission from the lower polariton branch (LPB) occurs at zero in-plane wavevector well below the uncoupled cavity mode. The contribution of multiple localized polariton modes above threshold and the … Show more

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Cited by 107 publications
(70 citation statements)
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“…Compared to our previous AlN/Al 0.2 Ga 0.8 N-based microcavities, where we had been able to stack only 13 pairs, leading to a modest Q of about 500, 17 the current cavities display Qs in the order of 1500-2500, as shown in Figure 2 (a) and (b), owing to the increased number of crack-free pairs. While a large local Q is an important figure of merit for a microcavity, as it contributes to lowering the polariton lasing threshold, a high spatial homogeneity of the cavity resonance energy is also necessary to get an extended polariton condensate, 18 rather than strongly localized ones as reported in CdTe cavities.…”
Section: Lpn-cnrs Route De Nozay 91460 Marcoussis Francementioning
confidence: 95%
“…Compared to our previous AlN/Al 0.2 Ga 0.8 N-based microcavities, where we had been able to stack only 13 pairs, leading to a modest Q of about 500, 17 the current cavities display Qs in the order of 1500-2500, as shown in Figure 2 (a) and (b), owing to the increased number of crack-free pairs. While a large local Q is an important figure of merit for a microcavity, as it contributes to lowering the polariton lasing threshold, a high spatial homogeneity of the cavity resonance energy is also necessary to get an extended polariton condensate, 18 rather than strongly localized ones as reported in CdTe cavities.…”
Section: Lpn-cnrs Route De Nozay 91460 Marcoussis Francementioning
confidence: 95%
“…On the contrary, the robustness of excitons in GaN and ZnO at RT has led to an increasing interest for these materials, especially after the first observation at RT of the strong coupling regime (SCR) 23 , and of polariton lasing in bulk- 24 and quantum well-based 25 GaN MCs elaborated on sapphire substrates. Concerning ZnO MCs, the SCR at RT has been reported more recently [26][27][28][29] , followed by polariton lasing at 120K 30 , then up to 250 K 31 , and finally at RT 32,33 . The difficulty to increase the number of pairs of the distributed Bragg reflectors (DBRs) due to the lattice and thermal expansion coefficient mismatch between silicon and nitrides prevented the achievement of polariton lasing in such samples 34,35 .…”
Section: Introductionmentioning
confidence: 99%
“…As bosonic quasiparticles, polaritons experiment final-state stimulated scattering, which results, above a density threshold, in a laser-like emission without population inversion, a collective phenomenon that is explained in the framework of Bose-Einstein condensation [9][10][11]. A unique feature of polariton condensates is their driven/dissipative nature, in which the steady state is reached through a dynamical balance of pumping and dissipation.Polariton condensate have been experimentally observed in different materials, both inorganic [12][13][14][15] and organic semiconductors [16,17], and thanks to their light mass, condensation is achieved also at room temperature [18]. However, differently from their atomic counterpart, these condensates suffer from dephasing and density fluctuations induced by the interactions with the exciton reservoir, effectively resulting in multimode condensates [19][20][21].…”
mentioning
confidence: 99%
“…Polariton condensate have been experimentally observed in different materials, both inorganic [12][13][14][15] and organic semiconductors [16,17], and thanks to their light mass, condensation is achieved also at room temperature [18]. However, differently from their atomic counterpart, these condensates suffer from dephasing and density fluctuations induced by the interactions with the exciton reservoir, effectively resulting in multimode condensates [19][20][21].…”
mentioning
confidence: 99%