Blanchard F, Doi A, Tanaka T, Hirori H, Tanaka H, Kadoya Y, Tanaka K
Institute for Integrated Cell-Material Sciences, Kyoto University, Sakyo-ku, Kyoto, Japan.
Opt Express. 2011 Apr 25;19(9):8277-84. doi: 10.1364/OE.19.008277.
We report a terahertz near-field microscope with a high dynamic range that can capture images of a 370 x 740 μm2 area at 35 frames per second. We achieve high spatial resolution (14 μm corresponding to λ/30 for a center frequency at 0.7 THz) on a large area by combining two novel techniques: terahertz generation by tilted-pulse-front excitation and electro-optic balanced imaging detection using a thin crystal. To demonstrate the microscope capability, we reveal the field enhancement at the gap position of a dipole antenna after the irradiation of a terahertz pulse.
我们报道了一种具有高动态范围的太赫兹近场显微镜，它能够以每秒35帧的速度捕获面积为370×740μm²的图像。通过结合两种新技术，我们在大面积上实现了高空间分辨率（对于中心频率为0.7太赫兹，14μm对应于λ/30）：倾斜脉冲前沿激发产生太赫兹以及使用薄晶体的电光平衡成像检测。为了展示该显微镜的能力，我们揭示了太赫兹脉冲照射后偶极天线间隙位置处的场增强情况。
