Results 11 to 20 of about 21,293 (257)
Turbulence hierarchy in a random fibre laser [PDF]
Nature Communications, 2017 Random fibre lasers constitute a class of lasers where the optical feedback is provided by multiple scattering in a disordered system. Here, Gonzálezet al.
Iván R. Roa González +9 more
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Angle-free random laser enabled efficient photocatalytic degradation of Rhodamine 6G molecules
APL Materials, 2023 Efficient photocatalytic dye degradation has been realized based on the first attempt of using a random laser. In previous studies, most photocatalytic dye degradation was conducted by using broad-angular emission lamps, light-emitting diodes, and ...
Jheng-Syun You +6 more
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Scientific Reports, 2018 AbstractRandom laser with intrinsically uncomplicated fabrication processes, high spectral radiance, angle-free emission, and conformal onto freeform surfaces is in principle ideal for a variety of applications, ranging from lighting to identification systems. In this work, a white random laser (White-RL) with high-purity and high-stability is designed,
Shu-Wei Chang +14 more
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Advances in Optics and Photonics, 2010 In conventional lasers, the optical cavity that confines the photons also determines essential characteristics of the lasing modes such as wavelength, emission pattern, ... In random lasers, which do not have mirrors or a well-defined cavity, light is confined within the gain medium by means of multiple scattering.
Andreasen J. +10 more
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Waveguided nematic liquid crystal random lasers
Nanophotonics, 2021 In waveguided nematic liquid crystal random lasers (NLCRLs), we realize polarized random laser (RL) emission and discover that the waveguide effect reduces the transmission loss of the RL whose polarization is parallel to the liquid crystal molecules ...
Huang Yunxi +7 more
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Polarization analysis of random THz lasers
APL Photonics, 2021 By varying the geometrical filling factor from 8% to 12% and the hole radius from 3 to 5 µm, we investigate the interference pattern of a set of surface emitting, electrically pumped random lasers (RLs) at terahertz frequencies employing a surface ...
Alessandra Di Gaspare +1 more
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Controllable Liquid Crystal Micro Tube Laser
Crystals, 2021 This study demonstrates controllable random lasing emissions in a dye-doped nematic liquid crystal (DDNLC)-infiltrated microcapillary. The emission wavelength of the micro tube laser can be adjusted by changing the focusing position of the pumped pulses ...
Jia-De Lin +5 more
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Perovskite random lasers on fiber facet
Nanophotonics, 2020 Hybrid lead halide perovskites have made great strides in next-generation photovoltaic and optoelectronic devices. Random lasers based on perovskite materials have been intensively investigated, but the miniaturization of perovskite random lasers has not
Zhang Xiao +8 more
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A glassy model for random lasers [PDF]
Philosophical Magazine, 2007 We report oil a recent model introduced to describe the behaviour Of light in a nonlinear active random medium, i.e., laser. The emitted radiation is described by I disordered mean-field Hamiltonian for the phases of the complex amplitudes of the electromagnetic field modes. Using the replica trick the thermodynamics can be exactly solved.
L. ANGELANI +3 more
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Coherent instabilities in random lasers [PDF]
Physical Review A, 2011 A numerical study is presented of random lasers as a function of the pumping rate above the threshold for lasing. Depending on the leakiness of the system resonances, which is typically larger in random lasers compared to conventional lasers, we observe that the stationary lasing regime becomes unstable above a second threshold.
Andreasen, Jonathan +2 more
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