Photonic cloak made of subwavelength dielectric elliptical rod arrays

Abstract

Modern photonic devices require more and more compact integration of photonic components and mechanical components, which, however, will cause interference and degrade the photonic performance. Here we propose a method that can be used to reduce the interference caused by non-photonic parts in a photonic device. It employs a photonic cloak made of subwavelength dielectric elliptical rod arrays in a photonic waveguide environment. This cloak design is able to preserve the device's photonic performance with the mechanical components penetrating through, and thus provide a more compact platform. Cloaks that suppress the interference from the periphery and the inner region of the waveguide are designed and verified through numerical simulation. They can be implemented through standard photonic crystal fabrication.