Co-existence of strongly and weakly localized random laser modes

Fallert, J.; Dietz, R. J. B.; Sartor, Janos; Schneider, Daniel; Klingshirn, C.; Kalt, H.

doi:10.1038/nphoton.2009.67

Cited by 231 publications

(190 citation statements)

References 24 publications

Supporting

Mentioning

184

Contrasting

Order By: Relevance

“…(H) (the average is taken over the N(N21)/2 possible pairs among the N55 considered points) and demonstrates that the correlation between spectra at different positions increases with H. A key point is that the increment of Q is not due merely to an average smoothing of the envelope of the spectrum but also includes the persistence of 'small features' (some examples are marked with asterisks in Figure 3b) present in all the considered positions that should not be mistaken for noise. These small features have been previously noticed in earlier experiments, both in titanium dioxide 23 and in zinc oxide microclusters 20 and thin layers. 21 This measurement is the first direct experimental connection between the strong nonlinear interaction 13 and the appearance of such spectral features.…”

Section: Resultssupporting

confidence: 84%

“…16 First-principles timedomain simulations show that the modes of a RL arise from localized electromagnetic states, [17][18][19] which may appear in a localized or an extended fashion. Several experiments have been reported on the nature of these modes, 15,[20][21][22] and these studies attempted to address the correlation between the structure and the degree of localization.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Non-locality and collective emission in disordered lasing resonators

2013

View full text Add to dashboard Cite

Random lasing is observed in optically active resonators in the presence of disorder. As the optical cavities involved are open, the modes are coupled, and energy may pour from one state to another provided that they are spatially overlapping. Although the electromagnetic modes are spatially localized, our system may be actively switched to a collective state, presenting a novel form of non-locality revealed by a high degree of spectral correlation between the light emissions collected at distant positions. In a nutshell, light may be stored in a disordered nonlinear structure in different fashions that strongly differ in their spatial properties. This effect is experimentally demonstrated and theoretically explained in titania clusters embedded in a dye, and it provides clear evidence of a transition to a multimodal collective emission involving the entire spatial extent of the disordered system. Our results can be used to develop a novel type of miniaturized, actively controlled all-optical chip.

show abstract

Section: Resultssupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Non-locality and collective emission in disordered lasing resonators

2013

View full text Add to dashboard Cite

show abstract

“…Since closed loop past shows different output directions, modification of emission angles also influences on the emission spectra. Random lasing has been demonstrated in several ZnO nanostructures, such as ZnO powder [119,136], ZnO nanowires [23], ZnO nanoparticles [137], or polycrystalline ZnO thin films [135,138]. Figures 13A-13C show an example of random lasing showing the evolution of the emission spectra as the pump intensity was increased.…”

Section: Lasing Action In Znomentioning

confidence: 99%

Zinc Oxide Nanophotonics

Choi

Aharonovich

2015

Nanophotonics

View full text Add to dashboard Cite

Abstract:The emerging field of nanophotonics initiated a dedicated study of single photon sources and optical resonators in new class of materials. One such material is zinc oxide (ZnO) that has been long considered only for classical light-emitting applications. However, it recently showed promise for quantum photonics technologies. In this review, we highlight the recent advances in studying single emitters in ZnO, engineering of optical cavities and practical nanophotonics devices including nanolasers and electrically triggered devices. We finalize with an outlook at this promising area, as well as provide perspectives and open questions in solid state nanophotonics employing ZnO.

show abstract

“…So far, as gain materials, many studies on UV ZnO lasers have also been reported in various micro-/nano-cavity structures, such as random structures, [1][2][3][4][5][6][7][8][9][10][11][12][13] Fabry-Perot cavities, [14][15][16][17] whispering-gallery-mode resonators. [18][19][20][21] Although, in most of these ZnO lasers, the gain from electron-hole plasma (EHP) recombination under high excitation intensity condition has typically been reported as the origin of the stimulated emission (photon lasing), 12,13 the lasing originated by excitonic recombination, so-called polariton/exciton lasers, has also been demonstrated in well-designed cavity structures at room temperature.…”

confidence: 99%