Results 31 to 40 of about 1,852,020 (244)
One- and two-photon pumped organic semiconductor lasers [PDF]
, 2009 This thesis describes a number of studies on organic semiconductors focused around using them as gain media for lasers. The photophysical properties of organic semiconductors are studied using a wide range of experimental techniques, allowing the ...
Tsiminis, Georgios +34 more
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Wavelength-tuneable liquid crystal lasers from the visible to the near-infrared [PDF]
, 2011 The study of band-edge lasing from dye-doped chiral nematic liquid crystals has thus far been largely restricted to visible wavelengths. In this paper, a wide range of commercially available laser dyes are examined for their suitability as infrared ...
M. M. Qasim +13 more
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Microresonators for organic semiconductor and fluidic lasers [PDF]
, 2007 This thesis describes a number of studies of microstructured optical resonators, designed with the aim of enhancing the performance of organic semiconductor lasers and exploring potential applications. The methodology involves the micro-engineering of
Vasdekis, Andreas E.
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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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A fractional diffusion random laser [PDF]
Scientific Reports, 2019 AbstractThe goal of this letter is to introduce the concept of a non-resonant fractional random laser. This is achieved by extending the classical Letokhov model of photon diffusion through disordered gain media to fractional differential operators in space and time.
Yuyao Chen +2 more
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Welding with high power fiber lasers - A preliminary study. [PDF]
, 2007 The new generation of high power fiber lasers presents several benefits for industrial purposes, namely high power with low beam divergence, flexible beam delivery, low maintenance costs, high efficiency and compact size.
Costa, A. +5 more
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Spin Glass Behavior of Random Lasers: Experiments
, 2023 In this chapter, the authors summarize the findings after a brief and simple description of Replica Symmetry Breaking (RSB) and spin glass theory, aimed toward experimentalists and researchers not specialized in statistical mechanics theory.
Claudio Conti, Neda Ghofraniha
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Enhanced Photoluminescence and Random Lasing Emission in TiO2-Decorated FAPbBr3 Thin Films
Nanomaterials, 2023 Herein, titanium-dioxide-decorated organic formamidinium lead bromide perovskite thin films grown by the one-step spin-coating method are studied. TiO2 nanoparticles are widespread in FAPbBr3 thin films, which changes the optical properties of the ...
Xiaohong Liu, Caixia Xu, Hongquan Zhao
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Nonlinear effects in random lasers [PDF]
, 2011 International audienceRecent numerical and theoretical studies have demonstrated that the modes at threshold of a random laser are in direct correspondence with the resonances of the same system without gain, a feature which is well known in conventional
Sebbah, Patrick +2 more
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