Double threshold behavior in a resonance-controlled ZnO random laser

Niyuki, Ryo; Fujiwara, Hideki; Nakamura, Toshihiro; Ishikawa, Yoshie; Koshizaki, Naoto; Tsuji, Takeshi; Sasaki, Koichi

doi:10.1364/fio.2015.fth1g.3

Cited by 2 publications

(2 citation statements)

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“…The research for random lasers is an emerging research field [1][2][3][4][5][6][7][8][9][10][11], which recently is extended to highly flexible [12] and unconventional materials and setups [13,14]. If these systems can be operated spectrally and spatially well controlled they are featuring the future as large area coherent light sources ahead of all state of the art LEDs.…”

Section: Introductionmentioning

confidence: 99%

A Self-Consistent Quantum Field Theory for Random Lasing

Lubatsch¹,

Frank²

2019

Preprint

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The spatial formation of coherent random laser modes in strongly scattering disordered random media is a central feature in the understanding of the physics of random lasers. We derive a quantum field theoretical method for random lasing in disordered samples of complex amplifying Mie resonators which is able to provide self-consistently and free of any fit p arameter t he full set of transport characteristics at and above the laser phase transition. The coherence length and the correlation volume respectively is derived as an experimentally measurable scale of the phase transition at the laser threshold. We find t hat t he p rocess o f s timulated e mission i n extended disordered arrangements of active Mie resonators is ultimately connected to time-reversal symmetric multiple scattering in the sense of photonic transport while the diffusion coefficient is finite. A power law is found for the random laser mode diameters in stationary state with increasing pump intensity.

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Section: Introductionmentioning

confidence: 99%

A Self-Consistent Quantum Field Theory for Random Lasing

Lubatsch¹,

Frank²

2019

Preprint

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“…Indeed, the gain occurs within the plane of the MAPB film and the lasing emission is scattered out of the plane, resulting in an angle-independent emission from the surface of the MAPB/PMMA sample. Considering the ease with which the strong coupling regime is observed in MAPB [50][51][52], the question of the photonic or polaritonic nature of the lasing can be reasonably raised here as it was raised by Niyuki et al from a resonance-controlled ZnO random laser [53]. Especially, the blueshift of the MAPB/PMMA lasing peaks (of around 1-2 meV between 1.1 and 1.8 P th , see section 2 of the Supplementary) could be in favour of a polaritonic lasing.…”

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confidence: 99%

Directing Random Lasing Emission Using Cavity Exciton-Polaritons

Bouteyre

Deleporte

Lauret

et al. 2019

Proceedings of the International Conference on Perovskite Thin Film Photovoltaics and Perovskite Photonics and Optoelectronics

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Random lasing [1, 2] is an intriguing phenomenon occurring in disordered structures with optical gain. In such lasers, the scattering of light provides the necessary feedback for lasing action [3][4][5]. Because of the light scattering, the random lasing systems emit in all the directions [6] in contrast with the directional emission of the conventional lasers. While this property can be desired in some cases, the control of the emission directionality remains required for most of the applications. Besides, it is well known that the excitation of cavity exciton-polaritons is intrinsically directional [7][8][9]. Each wavelength (energy) of the cavity polariton, which is a superposition of an excitonic state and a cavity mode, corresponds to a well defined propagation direction. We demonstrate in this article that coupling the emission of a 2D random laser with a cavity polaritonic resonance permits to control the direction of emission of the random laser. This results in a directional random lasing whose emission angle with respect to the microcavity axis can be tuned in a large range of angles by varying the cavity detuning. The emission angles reached experimentally in this work are 15.8 • and 22.4 • .

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Double threshold behavior in a resonance-controlled ZnO random laser

Cited by 2 publications

References 26 publications

A Self-Consistent Quantum Field Theory for Random Lasing

A Self-Consistent Quantum Field Theory for Random Lasing

Directing Random Lasing Emission Using Cavity Exciton-Polaritons

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