상세정보
학술지
Gradual Tuning of the Terahertz Passband using a Square-loop Metamaterial based on a W-doped VO2 Thin Film
- 발행일
- 201903
- 출처
- Applied Physics Express, v.12 no.3, pp.1-5
- ISSN
- 1882-0778
- 출판사
- Japan Society of Applied Physics (JSAP), Institute of Physics (IOP)
- 협약과제
- 18HB1400, 초고속 통신 및 영상 신호처리를 위한 광/THz 원천기술 연구개발, 송민협
- 초록
- An electrically controllable terahertz (THz) square-loop metamaterial based on tungsten (W)-doped vanadium dioxide (VO2) films was designed and evaluated. The structure acts as both the bandpass filter and micro-heater. The various W concentrated VO2 films used to integrate with the metamaterial were successfully grown through the sol-gel method. The transition temperature decreased by ~14 K/at% and the resistance-temperature hysteresis curves broadened with higher doping concentrations. By utilizing the designed device, the transmitted THz wave can be tuned precisely, and the modulation depth can reach up to 0.72 in the 0.3-0.7 THz passband with a bias voltage below 2 V.
- KSP 제안 키워드
- Band-pass filter(BPF), Doping concentration, Hysteresis curves, Micro-heater, THz wave, Temperature hysteresis, W-doped, bias voltage, modulation depth, sol-gel method, thin film(TF)