Confined Band Gap in an Air-Bridge Type of Two-Dimensional AlGaAs Photonic Crystal

Abstract

The transmittance spectrum for an air-bridge type of AlGaAs photonic crystal (PC) slabs successfully fabricated was measured. It is found that the observed spectrum is consistent with both the theoretical band structure and the calculated one. Moreover, the transmittance due to the modes below the light line is found to be almost 100%, indicating that the guided modes should exist. The respective stop bands are observed in the gamma-M direction for TM-like and TE-like modes, implying that a photonic band gap should exist for the TE-like guided modes. The present PC is very suited for controlling the radiation field.

Near-field imaging of light propagation in photonic crystal waveguides: Explicit role of Bloch harmonics

“…8 and 9͒ ͑or with and without a bend 10 ͒ with subsequent normalization were found to be generally reliable for loss measurements by calibrating away extrinsic effects, such as, e.g., laser-PCW-detector coupling. However the efficiency found in this way may exceed 100%, [8][9][10] indicating that accurate characterization of low-loss PCWs with this technique is somewhat problematic. Alternatively, one can make use of the Fabry-Perot resonance technique that was successfully applied for quantitative measurements of the propagation loss in straight PCWs ͑Ref.…”

Optimization of the Q factor in photonic crystal microcavities

“…Beside standard applications of these structures (such as lasers or filters), they can potentially be used for cavity QED experiments, or as building blocks for quantum networks. Although three-dimensional (3-D) photonic crystals offer the opportunity to manipulate light in all three dimensions in space, many research groups have focused their efforts on planar photonic crystals (i.e., two-dimensional (2-D) photonic crystals of finite depth) in recent years [1]- [13]. The fabrication procedures of planar photonic crystals are much simpler than those of their 3-D counterparts, but their light confinement is only "quasi-3D" and resulting from the combined action of the 2-D photonic crystal and internal reflection.…”

Electromagnetic Wave Propagation in Two-Dimensional Photonic Crystals

“…Different types of 2D PC slab structures were realized: thin membranes suspended in air (also known as "air bridge" structures) (e.g., in Refs. [80,81]), thin slabs on a dielectric substrate (e.g., in Refs. [82,83]), or thin 2D PC slabs "sandwiched" between dielectrics (e.g., in Refs.…”

“…Various groups [68,77,78,79,80] fabricated two-dimensional PC slabs structures with submicron feature sizes, and applicable band gaps in the near-infrared. Different types of 2D PC slab structures were realized: thin membranes suspended in air (also known as "air bridge" structures) (e.g., in Refs.…”