Staggered Pade wavelength distribution for multi-Bragg photonic mirrors

被引：8

作者：

Estrada-Wiese, D. ^{[1
]}

del Rio, J. A. ^{[1
]}

Nava, R. ^{[1
]}

Gomez-Ocampo, J. ^{[1
]}

Tagueena-Martinez, J. ^{[1
]}

Montiel-Gonzalez, Z. ^{[1
]}

机构：

[1] Univ Nacl Autonoma Mexico, Inst Energias Renovables, Temixco 62580, Morelos, Mexico

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2015年 / 141卷

关键词：

Photonics; Porous silicon; Dielectric mirrors; Complex refractive index; BAND-GAP; REFRACTIVE-INDEX; LAYERS;

D O I：

10.1016/j.solmat.2015.05.048

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

High reflective mirrors are commonly used in solar concentration devices. It has been shown that photonic mirrors are suitable for this purpose. However, despite their high reflectivity, they absorb radiation and heat up showing degradation. To overcome this problem here we propose to enhance the reflectivity of the mirrors. We report an improved and easy method to design broadband high reflective mirrors and build them from porous silicon multilayers. Those are composed of a continuous arrangement of submirrors reflecting each one at a given wavelength. This method consists in staggering the wavelength distribution following a relation based on the Fade approximant. We simulate the reflectance spectra using the transfer matrix method taking into account the experimental complex refractive index of porous silicon. The comparison between the experimental and the reflectance spectra shows a good agreement. With this technique we have fabricated high quality dielectric mirrors that can be used for concentrated solar energy applications among others. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：315 / 321

页数：7

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