Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Modulation of Transmission Spectra of Anodized Alumina Membrane Distributed Bragg Reflector by Controlling Anodization Temperature | Nanoscale Res Lett 2009 4 665-667 DOI S11671-009-9289-7 NANO EXPRESS Modulation of Transmission Spectra of Anodized Alumina Membrane Distributed Bragg Reflector by Controlling Anodization Temperature Wen Jun Zheng Guang Tao Fei Biao Wang Li De Zhang Received 18 January 2009 Accepted 5 March 2009 Published online 24 March 2009 to the authors 2009 Abstract We have successfully prepared anodized alumina membrane distributed Bragg reflector DBR using electrochemical anodization method. The transmission peak of this distributed Bragg reflector could be easily and effectively modulated to cover almost any wavelength range of the whole visible spectrum by adjusting anodization temperature. Keywords Anodized alumina membrane Distributed Bragg reflector Photonic crystal Electrochemical anodization Anodization temperature Introduction Distributed Bragg reflector DBR is a structure which is consisted of periodically stacked multiple layers with different refractive indices in one dimension. As onedimensional photonic crystal PC it can strongly and selectively modify the propagation of the incident light. According to this outstanding optical character DBR has attracted much more attention in recent years due to its wide applications in light filters vertical cavity surface emitting laser electroabsorptive reflection modulators etc. 1-7 . Recently Wang et al. 8 described a photonic crystal via making air pores periodically in anodic alumina membrane AAM however the stop band of incident light W. J. Zheng G. T. Fei H B. Wang L. De Zhang Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanostructures Institute of Solid State Physics Hefei Institutes of Physical Science Chinese Academy of Sciences . Box 1129 Hefei 230031 People s Republic of China e-mail gtfei@ is only modified from 450 to 525 nm by changing the chemical etching time. When the incidence angle increases progressively a blue shift of the transmission peak .
