| 학회 | 한국재료학회 |
| 학술대회 | 2016년 가을 (11/16 ~ 11/18, 경주 현대호텔) |
| 권호 | 22권 2호 |
| 발표분야 | G. 나노/박막 재료 분과 |
| 제목 | The coupled NC metamaterial based perfect absorbers for energy devices |
| 초록 | The optical properties of these conventional metals (silver and gold) cannot be tuned for various metamaterial applications despite their negative refractive index and low loss properties in visible and near-infrared (NIR) ranges. [1] Many research groups have been studying the controlling of the optical properties of silver and gold by alloying two or more elements for applying to plasmonics and metamaterial applications. And the alternative plasmonic materials with improved optical properties over the traditional materials have been studied. In this study, we focus on the coupled nanocrystals (NCs) based metamaterial for perfect absorber in the visible and NIR regions. The hybrid Ag NCs with CdSe NCs were chemically coupled via the compact and conductive ligand in other to control optical, electronic or magnetic properties based on interaction of the constituent NCs. The chemical and structural properties of the coupled Ag-CdSe meta-atom was characterized by FT-IR and the dielectric permittivity of the coupled Ag-CdSe meta-atoms were measured by ellipsometry. The optical properties of Ag-CdSe meta-atoms could be changed with Ag- and CdSe ratio. The coupled Ag-CdSe NCs showed the small negative permittivity and low loss in the visible and NIR wavelength. The simulated perfect absorber using Ag-CdSe meta-atom showed the high absorption over 98%. We successfully fabricated Ag-CdSe NC metamaterial based perfect absorber which have high absorption by nanoimprint process. References [1] Gururaj V. Naik, Vladimir M. Shalaev , and Alexandra Boltasseva, “Alternative Plasmonic Materials: Beyond Gold and Silver”, Adv. Mater., 25, 3264–3294 (2013) |
| 저자 | Soo-Jung Kim1, Mi-Hyun Kim2, Heon Lee1, Sung-Hoon Hong2 |
| 소속 | 1Korea Univ., 2ETRI |
| 키워드 | metamaterial; nanocrystal; perfect absorber |
