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Abstract: Parametric photon creation via the dynamical Casimir effect DCE isevaluated numerically, in a three-dimensional rectangular resonant cavitybisected by a semiconductor diaphragm SD, which is irradiated by a pulsedlaser with frequency of GHz order. The aim of this paper is to determine someof the optimum conditions required to detect DCE photons relevant to a novelexperimental detection system. We expand upon the thin plasma sheet modelCrocce et al., Phys. Rev. A 70 033811 2004 to estimate the number ofphotons for both TE and TM modes at any given SD position. Numericalcalculations are performed considering up to 51 inter-mode couplings by varyingthe SD location, driving period and laser power without any perturbations. Itis found that the number of photons created for TE modes strongly depends on SDposition, where the strongest enhancement occurs at the midpoint not near thecavity wall; while TM modes have weak dependence on SD position. Anotherimportant finding is the fact that significant photon production for TM$ {111}$modes still takes place at the midpoint even for a low laser power of 0.01micro J-pulse, although the number of TE$ {111}$ photons decreases almostproportionately with laser power. We also find a relatively wide tuning rangefor both TE and TM modes that is correlated with the frequency variation of theinstantaneous mode functions caused by the interaction between the cavityphotons and conduction electrons in the SD excited by a pulsed laser.

Autor: Wade Naylor, S. Matsuki, Tomoaki Nishimura, Yoshiaki Kido

Fuente: https://arxiv.org/


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