论文标题
从石墨烯耦合的被动模式锁定的Terahertz激光器中产生超短脉冲
Ultrashort pulse generation from a graphene-coupled passively mode-locked terahertz laser
论文作者
论文摘要
具有较大瞬时强度的稳定的超短速度（FS-PS），Terahertz（THZ） - 频率辐射脉冲的产生是用于测量和超高速度通信的光 - 一种相互作用的基础要求。在固态电动激光器中，产生短脉冲的主要途径是通过被动模式锁定。但是，这尚未在THZ范围内实现，这定义了过去二十年来最长的目标之一。实际上，长期以来，被动模式锁定的实现固有地被与THZ激光器间增益相关的快速恢复时间而固有地阻碍。在这里，我们演示了一个自我启动的微型超短脉冲THZ激光器，利用了原始设备体系结构，其中包括沿着双金属半导体的整个空腔分布的多层 - 格拉烯可饱和吸收剂的表面图案，2.30-3.55 THz线激光器。展示了具有4.0-PS长的脉冲的自我启动脉冲发射，以紧凑的，全电子，全池和廉价的构型中的脉冲发射。
The generation of stable trains of ultra-short (fs-ps), terahertz (THz)-frequency radiation pulses, with large instantaneous intensities, is an underpinning requirement for the investigation of light-matter interactions, for metrology and for ultra-high-speed communications. In solid-state electrically-pumped lasers, the primary route for generating short pulses is through passive mode-locking. However, this has not yet been achieved in the THz range, defining one of the longest standing goals over the last two decades. In fact, the realization of passive mode-locking has long been assumed to be inherently hindered by the fast recovery times associated with the intersubband gain of THz lasers. Here, we demonstrate a self-starting miniaturized ultra-short pulse THz laser, exploiting an original device architecture that includes the surface patterning of multilayer-graphene saturable absorbers distributed along the entire cavity of a double-metal semiconductor 2.30-3.55 THz wire laser. Self-starting pulsed emission with 4.0-ps-long pulses in a compact, all-electronic, all-passive and inexpensive configuration is demonstrated.
