Characterization of two-threshold behavior of the emission from a GaAs microcavity

Tempel, Jean-Sebastian; Veit, Franziska; Aßmann, Marc; Kreilkamp, Lars E.; Rahimi‐Iman, Arash; Löffler, Andreas; Höfling, Sven; Reitzenstein, Stephan; Worschech, L.; Forchel, A.; Bayer, М.

doi:10.1103/physrevb.85.075318

Cited by 67 publications

(89 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2(a). Confirming the observations that we have reported previously [9], we observe a double threshold in the input-output characteristics [35][36][37][38], which strongly suggests a crossover from the linear regime to polariton lasing (at j = 50 A/cm 2 , and a subsequent transition (at j = 110 A/cm 2 ) into the regime of cavity mediated from an electron-hole plasma. It is worth noting that while the second threshold into the weak coupling regime acquires the shape of a smooth S in the double logarithmic plot, the polariton lasing threshold features a sudden increase in intensity.…”

supporting

confidence: 77%

Optical bistability in electrically driven polariton condensates

et al. 2015

View full text Add to dashboard Cite

We observe a bistability in an electrically driven polariton condensate, which is manifested by a memory dependent threshold characteristic. In contrast to the polariton bistabilities previously observed in resonantly optically pumped microcavities, our effect occurs under nonresonant electric pumping and is triggered by the current injection scheme. We explain the origin of the bistability by a dependence of the electron-hole tunneling lifetime on the carrier density in the embedded quantum wells. The field screening effect creates a positive feedback loop, which yields the bistable behavior of the condensate. We develop a rate-equation-based model which qualitatively explains the occurrence of the hysteresis under current injection, its reduction with increased magnetic field, and the absence of bistability under optical pumping.

show abstract

supporting

confidence: 77%

Optical bistability in electrically driven polariton condensates

et al. 2015

View full text Add to dashboard Cite

show abstract

“…However, a distinct second threshold was not observed, unlike in previous studies. [11][12][13][14][15][16][17] As expected from BEC thermal equilibrium theory, the threshold increased with an increase in the temperature but the second threshold was not observed (e)], the second threshold was not observed, which implies that the system has already reached photon lasing after the first threshold. However, as we will show later, the properties of the second-order correlation function make this slightly ambiguous in the case of 100 K. Looking at the change in the PL energy at k = 0, which gives the maximum PL intensity at each temperature ( another jump in the PL energy at around 40 mW to an energy 7 meV higher than that below the condensation threshold and equal to the cavity photon energy.…”

Section: Pl Intensitymentioning

confidence: 52%

“…In the 8 K case [ Fig. 8 (a)], the PL showed bunching behavior above the threshold (g (2) (0) > 1) 4,17,18,25,30 up until the high-excitation-density regime, which was more than a hundred times the condensation threshold (>300 mW). When the measurements were performed using a high-time-resolution streak camera, 17 the g (2) (0) below the threshold was closer to 2 after the statistics of the thermal state were correctly obtained.…”

Section: Second-order Correlation Functionmentioning

confidence: 99%

“…[11][12][13][14][15][16][17][18]32 The PL intensity has a second threshold, 11,15,32 where population inversion is believed to be the reason for the transition to photon lasing. In ref.…”

Section: Behavior In a High Excitation Regimementioning

confidence: 99%

“…Population inversion then occurs, and photon lasing is observed after the second nonlinear increase, which is often called the second threshold in contrast to the first or condensation threshold. [11][12][13][14][15][16][17][18] However, recent theoretical studies [19][20][21][22][23] have indicated that some e-h pairs can remain in the high-density regime.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Temperature Dependence of Highly Excited Exciton Polaritons in Semiconductor Microcavities

et al. 2013

Self Cite

View full text Add to dashboard Cite

Observations of polariton condensation in semiconductor microcavities suggest that polaritons can be exploited as a novel type of laser with low input-power requirements.The low-excitation regime is approximately equivalent to thermal equilibrium, and a higher excitation results in more dominant nonequilibrium features. Although standard photon lasing has been experimentally observed in the high excitation regime, e-h pair binding can still remain even in the high-excitation regime theoretically. Therefore, the photoluminescence with a different photon lasing mechanism is predicted to be different from that with a standard photon lasing. In this paper, we report the temperature dependence of the change in photoluminescence with the excitation density. The second threshold behavior transited to the standard photon lasing is not measured at a lowtemperature, high-excitation power regime. Our results suggest that there may still be an electron-hole pair at this regime to give a different photon lasing mechanism.

show abstract

Effect of an external resonator on the stimulated emission of a semiconductor microcavity with embedded quantum wells

Belykh

Mylnikov

2015

Physica Status Solidi (b)

View full text Add to dashboard Cite

The effect of an external resonator on the emission of a GaAs microcavity with embedded quantum wells is investigated experimentally and theoretically. It was shown that the external resonator controls the process of the stimulated emission of the microcavity leading to the threshold-like appearance of closely separated modes in a spectrum and to oscillations in the temporal dynamics of the emission. Investigation of the spatial coherence with a temporal resolution shows a complex phase dynamics related to the interplay between the lasing modes and reveals a strong spatial inhomogeneity of a phase within each mode. [7] and the relation between polariton and photon BEC and a conventional laser is actively discussed [8][9][10][11][12]. It should be noted, however, that true BEC in a pure two-dimensional system, such as an ideal planar MC, is impossible according to the HohenbergMermin-Wagner theorem [13]. Therefore, polariton condensation observed in the experiments results from the finite size of the system, which is limited either by the excitation spot or by a lateral confining potential for polaritons. This potential is formed by an MC lateral disorder [5,14,15], applied stress [16], or artificially by producing MC micropillars [17,18]. It provides a favorable condition for the polariton condensation [16] and leads to a significant modification of

show abstract

Characterization of two-threshold behavior of the emission from a GaAs microcavity

Cited by 67 publications

References 33 publications

Optical bistability in electrically driven polariton condensates

Optical bistability in electrically driven polariton condensates

Temperature Dependence of Highly Excited Exciton Polaritons in Semiconductor Microcavities

Effect of an external resonator on the stimulated emission of a semiconductor microcavity with embedded quantum wells

Contact Info

Product

Resources

About