engleski

Laser resonators with nanoparticles gain medium for new laser profiles and optical logic gates

I will present experimental setup for generation of new laser profiles which are fully defined inside the resonator. That means that they to do not require any additional optical shaping and presents a challenging task for use in particle confinement, laser tweezers, magneto-optical and gravito-optical traps, optoelectronics and in communication technology. Specifically, I will show realizations of linear and cylindrical laser profiles. Experimental setup is made up of laser resonator consisting of two mirrors, gain medium CdSe nanoparticles in solution, and an additional optical component placed within the resonator that is responsible for the shape of the output laser profile. This optical component proved to be the most challenging part of the setup since it had to be almost completely transparent in order to achieve a laser effect. For pump beam we used a 532 nm from nanosecond YAG laser and achieve the output laser emission at 655 nm (which is defined with used CdSe nanoparticles). Additionally, we used similar setup to achieve a NOT logical gate, which due to the use of the nanoparticles in solution and not the standard semiconductor elements, present a unique realization of completely optical logic gate.

laser, resonator, nanoparticles

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