Nano-electronic and Photonic Systems (NePhoS), Departament d'Enginyeria Electrònica, Elèctrica i Automàtica, Universitat Rovira i Virgili , Avinguda Paisos Catalans 26, 43007 Tarragona, Spain.
ACS Appl Mater Interfaces. 2013 Dec 26;5(24):13375-81. doi: 10.1021/am4043118. Epub 2013 Dec 6.
A distributed Bragg reflector based on nanoporous anodic alumina was fabricated using an innovative cyclic anodization voltage approach, which resulted in an in-depth modulation of the pore geometry and the refractive index. The effect of a pore-widening wet-etching step on the structure's photonic stop-band properties was studied. From transmittance measurements, it was shown that by changing the pore-widening time it is possible to modulate the photonic stop band in the range of visible to near infrared. With the help of a theoretical model, we were able to obtain information about the evolution with the pore widening of the material effective refractive indexes. This opens the possibility of obtaining several optoelectronic devices based on nanoporous anodic alumina.
采用创新性的循环阳极氧化电压方法制备了基于纳米多孔阳极氧化铝的分布式布拉格反射镜，这导致了孔径几何形状和折射率的深度调制。研究了扩孔湿蚀刻步骤对结构光子带隙特性的影响。从透过率测量可以看出，通过改变扩孔时间，可以在可见光到近红外范围内调节光子带隙。借助理论模型，我们能够获得有关随孔径扩宽的材料有效折射率的演化信息。这为基于纳米多孔阳极氧化铝的多种光电设备的获得提供了可能。
