Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands.
Opt Lett. 2011 Aug 1;36(15):2776-8. doi: 10.1364/OL.36.002776.
An ultrafast all-optical shutter is presented, based on a simple two-color, two-photon absorption technique. For time-resolved luminescence measurements, this shutter is an interesting alternative to the optical Kerr gate. The rejection efficiency is 99%; the switching-off and switching-on speeds are limited by the pulse length only; the rejection time is determined by the crystal slab thickness; and the bandwidth spans the entire visible spectrum. We show that our shutter can also be used for accurate measurement of group velocity inside a transparent material.
我们提出了一种超快全光快门，基于简单的双色双光子吸收技术。对于时间分辨的发光测量，这种快门是光学克尔门的一个有趣的替代方案。其抑制效率为 99%；开关速度仅受脉冲长度限制；抑制时间由晶体薄片厚度决定；带宽覆盖整个可见光谱。我们表明，我们的快门也可用于精确测量透明材料中的群速度。
