Augmentation of absorption channels induced by wave-chaos effects in free-standing nanowire arrays
| Autor: | Hyeon-Hye Yu, Ji-Hwan Kim, Ji-Won Lee, Jinhyeok Ryu, Chang-Hwan Yi, Jaewon Kim, Sung Bum Kang, Chil-Min Kim, Kyoung Jin Choi |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Absorption spectroscopy business.industry Nanowire Chaotic Resonance 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics Spectral line 010309 optics Optics CMOS 0103 physical sciences Optoelectronics Image sensor 0210 nano-technology business Absorption (electromagnetic radiation) |
| Zdroj: | Optics express. 28(16) |
| ISSN: | 1094-4087 |
| Popis: | Plenty of issues on quantal features in chaotic systems have been raised since chaos was accepted as one of the intrinsic properties of nature. Through intensive studies, it was revealed that resonance spectra in chaotic systems exhibit complicated structures, which is deeply concerned with sophisticated resonance dynamics. Motivated by these phenomena, we investigate light absorption characteristics of chaotic nanowires in an array. According to our results, a chaotic cross-section of a nanowire induces a remarkable augmentation of absorption channels, that is, an increasing number of absorption modes leads to substantial light absorption enhancement, as the deformation of cross-section increases. We experimentally demonstrate the light absorption enhancement with free-standing Si-nanowire polydimethylsiloxane (PDMS) composites. Our results are applicable not only to transparent solar cells but also to complementary metal-oxide-semiconductor (CMOS) image sensors to maximize absorption efficiency. |
| Databáze: | OpenAIRE |
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