نتایج جستجو برای: laser array
تعداد نتایج: 313937 فیلتر نتایج به سال:
High power diode lasers have found increased applications in pumping of solid state or fiber laser systems for industrial, military and medical applications as well as direct material processing applications. The non-linearity of the near-field of emitters (or the so called “smile” effect) in a laser diode array poses significant challenges in optical coupling and beam shaping and has become on...
We demonstrate a new type of laser composed of an array of coupled photonic crystal nanocavities that enables high differential quantum efficiency and output power, together with a low threshold power comparable to those of single photonic crystal cavity lasers. In our experiment, the laser efficiency increases faster than the lasing threshold with an increase in the number of coupled cavities....
Self-organized dendritic crystal growth is explored to assemble uniform semiconductor nanowires into highly ordered one-dimensional microscale arrays that resemble comb structures. The individual ZnO nanowires have uniform diameters ranging from 10 to 300 nm. They are evenly spaced on a stem with a regular periodicity of 0.1-2 micrometer. Under optical excitation, each individual ZnO nanowire s...
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