Abstract

We propose a novel acousto-optic (AO) devise using suspended fishbone nanobeams based on phononic and photonic potential well (PnPW and PtPW). We aim to reduce the traditional device size and eliminate the need for mirror regions in 1-D nanobeam cavity. By manipulating the frequencies of slow sound (SS) and slow light (SL) modes through geometric parameters, we can create potential wells for phonons and photons. The potential wells concentrate the waves inside the resonant cavity simultaneously, leading to an increase in AO coupling rate. We demonstrate the capability of potential wells in improving the AO coupling rate and investigate the impact of both wells. Some distribution of the phonons may affect the photons with a negative contribution, leading to a decrease in the coupling rate. Careful selection of appropriate acoustic and optical modes can overcome this limitation, making this structure a promising candidate for designing AO devices in silicon photonics.

摘要

我们提出了一种基于声子和光子势阱（PnPW 和 PtPW）的悬浮鱼骨纳米束的新型声光 (AO) 设计。我们的目标是减小传统器件的尺寸并消除一维纳米束腔中对镜面区域的需求。通过几何参数操纵慢声 (SS) 和慢光 (SL) 模式的频率，我们可以为声子和光子创建势阱。势阱同时将波集中在谐振腔内，导致 AO 耦合率增加。我们展示了潜在井在提高 AO 耦合率方面的能力，并研究了这两个井的影响。声子的某些分布可能会影响具有负贡献的光子，从而导致耦合率降低。