Zhu Wenqi, Agrawal Amit, Cao Hua, Nahata Ajay
Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT 84112, USA.
Opt Express. 2008 Jun 9;16(12):8433-9. doi: 10.1364/oe.16.008433.
We demonstrate the ability to directly generate broadband THz surface plasmons via optical rectification on a cylindrical metal wire. This is accomplished by milling a single circumferential groove into the wire and overcoating it with a poled polymer that exhibits a bulk second order susceptibility. An attractive feature of this approach is the potential to generate THz pulses that are limited in duration only by the duration of the optical pump pulse. While a photoconductive detector is used in the present demonstration, we discuss further refinements to the system that should allow for significant enhancement of the nonlinear optical conversion efficiency and detection bandwidth.
我们展示了通过在圆柱形金属丝上进行光整流直接产生宽带太赫兹表面等离子体激元的能力。这是通过在金属丝上铣出一个圆周槽并在其上覆盖一层具有体二阶极化率的极化聚合物来实现的。这种方法的一个吸引人的特点是有可能产生仅受光泵浦脉冲持续时间限制的太赫兹脉冲。虽然在目前的演示中使用了光电导探测器，但我们讨论了对该系统的进一步改进，这应该能够显著提高非线性光学转换效率和探测带宽。
