| 학회 | 한국재료학회 |
| 학술대회 | 2014년 가을 (11/27 ~ 11/28, 대전컨벤션센터) |
| 권호 | 20권 2호 |
| 발표분야 | 제27회 신소재 심포지엄-나노 공정을 이용한 메타 신소재 |
| 제목 | Nanocups array for plasmon resonance at visible wavelength |
| 초록 | Surface plasmon resonance is the resonant oscillation of electrons at the interface between a metal and a dielectric material by incident light. The surface plasmon has two important effects; enhancement of electric field near the particle and maximum extinction value in resonant frequency. Because of these advantages, many groups are studying on plasmonic nanostructures such as nanorings, nanorod arrays, nanoshells and so on. Among the nanostructures, hemispherical nanocup has unique optical properties [1-2]. In this study, we fabricated angulate nanocups array by using nanoimprint lithography method. Nanoimprint lithography was conducted with stamps having pillars with different pitch sizes; 700 nm, 400 nm and 200 nm. After finishing the nanoimprint process, Au and Si3N4 were subsequently deposited to the imprinted holes by sputtering with some angles while rotating the samples. Then, Au/Si3N4 nanocups array was characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM) and UV-VIS spectroscopy. The resonance was blue-shifted as the pitch size of the nanocups was smaller. The nanocups array at 250 nm pitch size showed 85% extinction at 650 nm. Furthermore, we expect that it helps to increase the efficiency of solar cells due to the trapping of specific wavelength of light (650 nm). ♦ References [1] Nicholas S. King, Yang Li, Ciceron Ayala-Orozco, Travis Brannan, Peter Nordlander and Naomi J. Halas, ACS nano, 5, 7254, (2011) [2] Wei-Guo Yan, Cui-Feng Ying and Xiang-Tian Kong, Plasmonics, 8, 1607, (2013) |
| 저자 | 정건영 |
| 소속 | 광주과학기술원 신소재공학과 |
| 키워드 | plasmon; nanocup; nanoimprint; extinction |
