Guiding optical flows by photonic crystal slabs made of dielectric cylinders

Abstract

We investigate the electromagnetic propagation in two-dimensional photonic crystals, formed by parallel dielectric cylinders embedded in a uniform medium. The frequency band structure is computed using the standard plane-wave expansion method, while the propagation and scattering of the electromagnetic waves are calculated by the multiple scattering theory. It is shown that within partial band gaps, the waves tend to bend away from the forbidden directions. Such a property may render novel applications in manipulating optical flows. In addition, the relevance with the imaging by flat photonic crystal slabs will also be discussed.

Acoustic imaging and collimating by slabs of sonic crystalsmade from arrays of rigid cylinders in air

“…12,13 These discoveries are expected to pave a new avenue for photonic crystal applications in controlling optical flows. 14 Due to the similarities between acoustic and EM waves, acoustic imaging by flat slabs of sonic crystals may also be possible. In the present letter, we wish to explore this possibility, following the work done on photonic crystals.…”

Lanczos pseudospectral method for initial-value problems in electrodynamics and its applications to ionic crystal gratings

“…This explains the amplitude difference of the blue and red curves. Finally, the concept of trapped modes localized on successive layers and interacting with each other provides a theoretical framework for light propagation in layered structures such as photonic crystal slabs [39].…”

Negative refraction in a photonic crystal with a metallic cross lattice basis

“…More importantly, this anisotropic behavior and a collimation effect have been cited as reasons for the imaging effect, rather than negative refraction itself. [11][12][13][14] It is clear that there are practical limitations which need to be addressed with either negative-index PC design. The goal of this work is to explore and overcome the limitations of the plane-wave refraction in PC metamaterials that relies on high-order isotropic bands.…”