Katayama I, Akai R, Bito M, Matsubara E, Ashida M
Graduate School of Engineering, Yokohama National University, Yokohama, Kanagawa 240-8501, Japan.
Opt Express. 2013 Jul 15;21(14):16248-54. doi: 10.1364/OE.21.016248.
We have demonstrated that a photoconductive antenna gated with 5-fs ultrashort laser pulses can detect electric field transients of near-infrared pulses at least up to 180 THz. Measured sensitivity spectrum of the antenna shows a good agreement with a simple calculation, demonstrating the promising capability of the antenna to near infrared spectroscopy. Using this setup, near-infrared time-domain spectroscopy and characterization of phase controlled near-infrared pulses are demonstrated. Observed absorption spectrum of a polystyrene film and complex refractive index dispersion of a fused silica plate both agree well with those obtained by the conventional methods.
我们已经证明，用5飞秒超短激光脉冲门控的光电导天线能够检测至少高达180太赫兹的近红外脉冲的电场瞬变。天线测量的灵敏度光谱与简单计算结果吻合良好，证明了该天线在近红外光谱方面具有良好的应用潜力。利用该装置，展示了近红外时域光谱以及相位控制近红外脉冲的特性。观察到的聚苯乙烯薄膜吸收光谱和熔融石英板的复折射率色散与传统方法获得的结果均吻合良好。
