Dynamic response of metamaterials in the terahertz regime: Blueshift tunability and broadband phase modulation

作者：Manceau J M^*; Shen N H; Kafesaki M; Soukoulis C M; Tzortzakis S

来源：Applied Physics Letters, 2010, 96(2): 021111.

DOI：10.1063/1.3292208

• gallium arsenide
• high-speed optical techniques
• III-V semiconductors
• metamaterials
• numerical analysis
• terahertz wave spectra

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.

• 出版日期2010-1-11