Broadband Light-Trapping Enhancement in an Ultrathin Film a-Si Absorber Using Whispering Gallery Modes and Guided Wave Modes with Dielectric Surface-Textured Structures

被引：56

作者：

Kang, Gumin ^{[1
]}

Park, Haesung ^{[1
]}

Shin, Dongheok ^{[1
]}

Baek, Seunghwa ^{[1
]}

Choi, Minjung ^{[1
]}

Yu, Dai-Hyuk ^{[2
]}

Kim, Kyoungsik ^{[1
]}

Padilla, Willie J. ^{[3
]}

机构：

[1] Yonsei Univ, Sch Mech Engn, Seoul 120749, South Korea

[2] Korea Res Inst Stand & Sci, Div Phys Metrol, Taejon 305340, South Korea

[3] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA

来源：

ADVANCED MATERIALS | 2013年 / 25卷 / 18期

基金：

新加坡国家研究基金会;

关键词：

photonic crystals; whispering gallery modes; nanostructures; metamaterials; self-assembly; ABSORPTION ENHANCEMENT; EFFICIENCY ENHANCEMENT;

D O I：

10.1002/adma.201204596

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An embedded nanosphere dielectric structure on an a-Si ultrathin film improves weighted absorption from 23.8% to 39.9%. The PMMA embedding layer offers a guided wave mode as well as mechanical robustness, in addition to the resonant whispering gallery modes coupling. Broadband light-trapping enhancements are observed by dielectric surface textured structures of hemispheres, nanocones, nanospheres, or embedded nanospheres. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：2617 / 2623

页数：7

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