- Treffer 1 von 1
Coherent Polariton Laser
Zitieren Sie bitte immer diese URN: urn:nbn:de:bvb:20-opus-166597
- The semiconductor polariton laser promises a new source of coherent light, which, compared to conventional semiconductor photon lasers, has input-energy threshold orders of magnitude lower. However, intensity stability, a defining feature of a coherent state, has remained poor. Intensity noise many times the shot noise of a coherent state has persisted, attributed to multiple mechanisms that are difficult to separate in conventional polariton systems. The large intensity noise, in turn, limits the phase coherence. Thus, the capability of theThe semiconductor polariton laser promises a new source of coherent light, which, compared to conventional semiconductor photon lasers, has input-energy threshold orders of magnitude lower. However, intensity stability, a defining feature of a coherent state, has remained poor. Intensity noise many times the shot noise of a coherent state has persisted, attributed to multiple mechanisms that are difficult to separate in conventional polariton systems. The large intensity noise, in turn, limits the phase coherence. Thus, the capability of the polariton laser as a source of coherence light is limited. Here, we demonstrate a polariton laser with shot-noise-limited intensity stability, as expected from a fully coherent state. This stability is achieved by using an optical cavity with high mode selectivity to enforce single-mode lasing, suppress condensate depletion, and establish gain saturation. Moreover, the absence of spurious intensity fluctuations enables the measurement of a transition from exponential to Gaussian decay of the phase coherence of the polariton laser. It suggests large self-interaction energies in the polariton condensate, exceeding the laser bandwidth. Such strong interactions are unique to matter-wave lasers and important for nonlinear polariton devices. The results will guide future development of polariton lasers and nonlinear polariton devices.…
Autor(en): | Seonghoon Kim, Bo Zhang, Zhaorong Wang, Julian Fischer, Sebastian Brodbeck, Martin Kamp, Christian Schneider, Sven Höfling, Hui Deng |
---|---|
URN: | urn:nbn:de:bvb:20-opus-166597 |
Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
Institute der Universität: | Fakultät für Physik und Astronomie / Physikalisches Institut |
Sprache der Veröffentlichung: | Englisch |
Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | Physical Review X |
Erscheinungsjahr: | 2016 |
Band / Jahrgang: | 6 |
Heft / Ausgabe: | 011026 |
Originalveröffentlichung / Quelle: | Physical Review X, 6, 011026 (2016). DOI: 10.1103/PhysRevX.6.011026 |
DOI: | https://doi.org/10.1103/PhysRevX.6.011026 |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Freie Schlagwort(e): | coherent light; condensed matter physics; photonics; polariton laser; quantum physics |
Datum der Freischaltung: | 09.07.2019 |
Lizenz (Deutsch): | CC BY: Creative-Commons-Lizenz: Namensnennung |