الفهرس 
AbstractOnly 14 pages are availabe for public view
 |  | from | 73 |  |  |
| | | from | 73 | | |
Abstract
In this paper, we studied theoretically a SiO2-Si PxC that supports optical and elastic localized resonant modes simultaneously. The enhanced AO interactions were studied through four AO material cavities between two identical Bragg mirrors. The incident elastic wave induces a trapped strain field in the cavity, then these spatial distributions change the refractive index of the AO materials. Three different cases of the AO modulation have been studied. The first case is the simplest one when a single photonic mode is modulated by one phononic mode inside the cavity (see figure 14 and 15). The modulations of two TE photonic modes with one or two phononic modes are the other two cases when TiO2 or PbMoO4 is selected as the cavity layer, respectively. They are the most favorable choice for AO interaction and support the maximum nonlinear modulation for refractive index modulation (see the appendix). The sinusoidal variance in the refractive index values of the defect material TiO2 (PbMoO4) with a thickness of 1340 nm hits a maximum value of 2.795(2.449) and a minimum value of 2.769(2.313). This is due to the successive contraction and rarefaction of the elastic energy confinement in the cavity. The quality factor can describe the cavity mode that gives the temporal localization. It is clear that higher Q increases the photon storage time (or classically the EM field energy) inside the cavity and provides a greater opportunity for AO interaction [14]. Several interesting phenomena and applications can result from the mechanisms of sound-light interaction at such small dimensions. For instance, ultra-sensitive sensors to store all-optical information of materials, sensors of vibrations in AO modulators and accurate refractive index modulation for various acousto-optic applications.