Two-dimensional lateral superlattices of nanostructures: Nonlithographic formation by anodic membrane template

Abstract

A nonlithographic technique that utilizes highly ordered anodized aluminum oxide porous membrane as template is presented as a general fabrication means for the formation of an array of vastly different two-dimensional lateral superlattices structures. Hexagonal close-packed nanopore arrays were fabricated on Si, GaAs, and GaN substrates via reactive ion etching. Quantum dot arrays of various metals and semiconductors were formed through evaporation and subsequent etching. The two-dimensional lateral superlattice structures fabricated using this method are of a high level of ordering, uniformity, and packing density. The diameter and periodicity of the nanostructures are determined by the features of the original alumina membrane, which can be adjusted by varying the anodization conditions.

Spin Relaxation from Continuous Film to Magnetic Nanostructures

“…Recently, it has attracted great interest of preparing magnetic nanoparticles using anodized aluminum oxide (AAO) membrane as a mask [23]. [26,27], which is also consistent with theoretical calculation [28].…”

“…In this session, we will present the study of spin dynamics of two different kinds of magnetic nanoparticles. One sample was prepared by ion implantation, the other sample is prepared by anodized aluminum oxide (AAO) membrane [23] …”

Effect of atomic distribution on cooperative spontaneous emission

“…The strong superradiance which approaches to the Dicke limit is hard to obtain in real experimental conditions where atoms are always distributed randomly. On the other hand, with the development of semiconductor quantum dots, the highly ordered arrays can be achieved in this artificial system [38,39] and its superradiance has been observed in experiment [40]. In the controllable artificial system, the cooperative effects can be studied in a regime which was difficult to achieve with real atoms [41][42][43], and our results may be valuable to its experimental research.…”

Stimulated emission and emission efficiency enhancement in nanopatterned silicon

“…19,25 The free-standing AAO membrane was lifted from an aqueous solution by a C-enriched Si wafer and subsequently etched in an RIE machine. The etch recipe used is given in table 2.…”