期刊
APPLIED PHYSICS LETTERS
卷 96, 期 2, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3292208
关键词
gallium arsenide; high-speed optical techniques; III-V semiconductors; metamaterials; numerical analysis; terahertz wave spectra
资金
- European Union [MEXT-CT-2006-042683]
- European Community [213390]
- cost actions [MP0702, MP0803]
- Air Force Material Command USAF [FA8655-07-1-3037]
- Department of Energy (Basic Energy Sciences) [DE-AC02---07CH11358]
Terahertz time-domain spectroscopy is used to probe the electromagnetic properties of metamaterials, which are dynamically photoexcited, using synchronized femtosecond near-infrared laser pulses. Blueshift tunability of the electric dipole metamaterial's resonance, as well as a broadband phase tunability reaching similar to pi/4, are demonstrated. Numerical simulations show the observations are due to changes in the complex index of the photoexcited semiconductor substrate.
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