Optical Characteristics of Two-Dimensional Photonic Crystals in Anodic Aluminum Oxide Films

Abstract

The optical properties of two-dimensional photonic crystals (PhCs) in anodic aluminum oxide (AAO) films obtained using a simple and low-cost pre-patterning procedure are described. The prepatterning of the initial Al film surface was carried out by imprinting with an optical diffraction grating; the anodization of the prepatterned sample led to the formation of a good quality, large-area PhC with a triangular lattice of air holes (lattice period a ¼ 0:48 mm, hole radius r ¼ 0:2 mm) in an AAO film. The optical transmission spectra of the sample were measured at visible wavelengths in the range of 0.4-1.0 mm for various incidence angles and linear polarizations of the probing light. The detailed analysis of the transmission data indicates a photonic band gap in the 0.9-1.0 mm wavelength range for light waves linearly polarized in the direction perpendicular to the axes of PhC pores.

Growth of Ordered Iron Oxide Nanowires for Photo-electrochemical Water Oxidation

“…[12][13][14][15] Moreover, the high density and the ordered structure of nanowires, when using the AAO method, has several other advantages, including light trapping by photonic crystals, for example. 16,17 Nevertheless, there have been limited studies on the synthesis of iron oxide nanowires using AAO templates for photocatalytic applications. [18][19][20] The best reported iron oxide (without doping) nanowires activity made using AAO templates had a saturation photocurrent of ~ 1.0-1.5 mA cm -2 @ 1.23 V vs reversible hydrogen electrode (RHE).…”

Conformal Deposition of Ni–P on Anodic Aluminum Oxide Template

“…[1][2][3][4][5] Typical templates employed are polycarbonate membrane filter and anodic aluminum oxide ͑AAO͒. [1][2][3][4][5] Typical templates employed are polycarbonate membrane filter and anodic aluminum oxide ͑AAO͒.…”

Three-dimensional microfabrication of materials by femtosecond lasers for photonics applications

“…Due to the high refractive indices of alumina and silicon and since the period of the structure can be defined with a high submicrometer resolution, these 2D structures can be used for PhC applications. 36 The anodic etching of silicon can be used to create nanocrystals of Si which are encapsulated in the complex network of a nanoporous silica host and are efficient emitters of blue photoluminescence. Various chemical and physical control methods, such as the use of auxiliary illumination, can be applied to guide 3D structuring of silicon.…”