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| Title | Broadband light-trapping enhancement in an ultrathin film a-Si absorber using whispering gallery modes and guided wave modes with dielectric surface-textured structures. |
| Publication Type | Journal Article |
| Year of Publication | 2013 |
| Authors | G Kang, H Park, D Shin, S Baek, M Choi, D-H Yu, K Kim, and WJ Padilla |
| Journal | Advanced materials (Deerfield Beach, Fla.) |
| Volume | 25 |
| Issue | 18 |
| Start Page | 2617 |
| Pagination | 2617 - 2623 |
| Date Published | 05/2013 |
| 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. |
| DOI | 10.1002/adma.201204596 |
| Short Title | Advanced materials (Deerfield Beach, Fla.) |