Lasing from Two‐Dimensional Photonic Crystals Using Anodic Porous Alumina

Abstract

ExperimentalODA-capped ZnSe nanowires were synthesized as previously described in detail [24]. About 800-900 lL of a nanowire suspension in toluene was spread dropwise at the air/water interface using a microsyringe on the LB trough (Labcon). The monolayer was subjected to various surface pressures at a very slow compression rate of 1 mm min -1 . The LB film transfer onto TEM grids was carried out over a range of surface pressures from 0 to 48 mN m -1 with a dipping speed of 1 mm min -1 , and eventually the different compression stages were studied by TEM (Jeol 2010 HR-TEM, equipped with a Gatan CCD camera). The most efficient alignment was achieved at a surface pressure of 32 mN m -1 . At this surface pressure the aligned nanowires were held for 2 h prior to deposition.

Fabrication of Anodic Porous Alumina by Squaric Acid Anodizing

“…Porous anodic oxide films of aluminum (anodic porous alumina) have been widely investigated as nanotemplates and resist films with good insulating properties for various micro-and nano-technology applications, such as magnetic recording media [1,2], electronic devices [3], biosensors [4], photonic crystals [5][6][7], microlens arrays [8,9], plasmonic devices [10][11][12], three-dimensional microstructures [13][14][15] and other basic nanodevices [16]. When aluminum is anodized in appropriate acidic electrolytes, porous alumina develops, which exhibits a uniform array of hexagonal cells, each containing a uniform cylindrical nanopore at the center [17][18][19][20][21][22] (lower right in Fig.…”

Quantitative characterization of acid concentration and temperature dependent self-ordering conditions of anodic porous alumina

“…7 In these applications, one usual requirement is that the arrangement of the pore-channels inside the porous alumina should be hexagonally self-ordered, and this means that the growth of the porechannels during aluminum anodization should be a self-ordering process 1, 2 with as infrequent splitting, merging or termination as possible. 8,9 Plenty of previous efforts have been made to find the anodization conditions which can result in self-ordering porous alumina patterns.…”

Growth behavior of anodic porous alumina formed in malic acid solution

“…Formation of anodic porous alumina is widely performed for the corrosion protection of aluminum and its alloys in aircraft, automobiles, boats, trains, buildings, etc. Recently, the characteristic nanoporous structure has been widely investigated for various applications in the field of micro-and nano-technologies, such as highly ordered templates [5][6][7], photonic crystals [8,9], high-density recording media [10,11], sensors [12], microlens arrays [13,14], and circuit boards [15].The structural features of nanoporous alumina can be controlled by the anodizing conditions because the pore interval (cell size) and diameter of the anodic porous alumina are determined by the electrolytes and voltages (electrochemical potential) applied during anodizing [16]. Chromic acid anodizing was patented by Bengough et al for surface finishing of aluminum and its alloys in 1923 [17].…”