Scattering of electromagnetic waves by an optically controlled subwavelength slot grating on a dielectric slab

In this study, using mode matching technique, the author theoretical analyzed electromagnetic wave scattering characteristics from a dielectric slab with an infinite periodic slot array filled with a semiconductor in which semiconductor plasma are induced every the interval of the integer time the original period of the slot array on the assumption that the period of the slot array without light illumination would be much smaller than the wavelength of the incident electromagnetic wave. And it was discussed about the possibility of the application of the slot array to the optically controlled reconfigurable circuits at millimeter wave frequency band. It was found that the frequency band at which the resonance anomaly was caused would be controlled by changing the plasma density and the equivalent number of the slots.