Articles you may be interested inPlasmonic formation mechanism of periodic 100-nm-structures upon femtosecond laser irradiation of silicon in waterThe role of asymmetric excitation in self-organized nanostructure formation upon femtosecond laser ablation AIP Conf.

We present exact solutions of an energy spectrum of 2-interacting particles in which they seem to be relativistic fermions in 2 + 1 space-time dimensions. The 2 × 2 spinor equations of 2-interacting fermions through general central potential were separated covariantly into the relative and center of mass coordinates. First of all, the coupled first order differential equations depending on radial coordinate were derived from 2 × 2 spinor equations. Then, a second order radial differential equation was obtained and solved for Coulomb interaction potential. We apply our solutions to exciton phenomena for a free-standing monolayer medium. Since we regard exciton as isolated 2-interacting fermions in our model, any other external effect such as substrate was eliminated. Our results show that the obtained binding energies in our model are in agreement with the literature. Moreover, the decay time of an exciton was found out spontaneously in our calculations.

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Nanoslit arrays are fabricated on thin metal film coated glass slides using femtosecond laser pulses