Broadband light-trapping enhancement in an ultrathin film a-si absorber using whispering gallery modes and guided wave modes with dielectric surface-textured structures

Gumin Kang, Haesung Park, Dongheok Shin, Seunghwa Baek, Minjung Choi, Dai Hyuk Yu, Kyoungsik Kim, Willie J. Padilla

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)2617-2623
Number of pages7
JournalAdvanced Materials
Volume25
Issue number18
DOIs
Publication statusPublished - 2013 May 14

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Whispering gallery modes
Guided electromagnetic wave propagation
Ultrathin films
Nanospheres
Laser modes
Polymethyl Methacrylate

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Kang, Gumin ; Park, Haesung ; Shin, Dongheok ; Baek, Seunghwa ; Choi, Minjung ; Yu, Dai Hyuk ; Kim, Kyoungsik ; Padilla, Willie J. / Broadband light-trapping enhancement in an ultrathin film a-si absorber using whispering gallery modes and guided wave modes with dielectric surface-textured structures. In: Advanced Materials. 2013 ; Vol. 25, No. 18. pp. 2617-2623.
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Broadband light-trapping enhancement in an ultrathin film a-si absorber using whispering gallery modes and guided wave modes with dielectric surface-textured structures. / Kang, Gumin; Park, Haesung; Shin, Dongheok; Baek, Seunghwa; Choi, Minjung; Yu, Dai Hyuk; Kim, Kyoungsik; Padilla, Willie J.

In: Advanced Materials, Vol. 25, No. 18, 14.05.2013, p. 2617-2623.

Research output: Contribution to journalArticle

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