Publication Date:
2018-05-15
Description:
Author(s): Ming Kang, Huifang Zhang, Xueqian Zhang, Quanlong Yang, Weili Zhang, and Jiaguang Han To fill the “terahertz gap” in frequency, where many materials do not interact effectively with light, systems with tunable absorption are still needed. The authors design and demonstrate a Fano-type metasurface supporting controllable coherent perfect absorption—lasing in reverse, essentially—, the experimental results being well described by coupled-mode theory. A transition from single- to dual-band operation is effected by simply changing the angle of incidence. This system offers the potential to realize dynamic THz modulators in conjunction with electrically driven vibration devices, and absorptive interferometers for switches and imaging. [Phys. Rev. Applied 9, 054018] Published Mon May 14, 2018
Electronic ISSN:
2331-7019
Topics:
Physics