低温强磁场下超快相干太赫兹光谱的光纤耦合微纳
Fiber-coupled Antennas for Ultrafast Coherent Terahertz Spectroscopy in Low Temperatures and High Magnetic Fields
摘要：
为了测量相关电子材料在低温和高磁场下的高频复电导率，介绍了一种直接在现有直流和脉冲磁体的低温孔中进行相干时域太赫兹光谱的方法。微型光纤耦合太赫兹发射器和接收器的构造和证明工作低至1.5开尔文和高达17特斯拉，最终用于高场磁体。在热循环过程中保持光纤和天线之间的亚微米对准，在长光纤末端获得超快（${<200}$ ~fs）光选通脉冲，以及设计与低功率光选通脉冲良好工作的高效器件构成了该项目的主要技术挑战。给出了YBCO超导薄膜和高迁移率二维电子气的实验数据。
英文摘要：
For the purposes of measuring the high-frequency complex conductivity of correlated-electron materials at low temperatures and high magnetic fields, a method is introduced for performing coherent time-domain terahertz spectroscopy directly in the cryogenic bore of existing dc and pulsed magnets. Miniature fiber-coupled THz emitters and receivers are constructed and are demonstrated to work down to 1.5 Kelvin and up to 17 Tesla, for eventual use in higher-field magnets. Maintaining the sub-micron alignment between fiber and antenna during thermal cycling, obtaining ultrafast (${<200}$~fs) optical gating pulses at the end of long optical fibers, and designing highly efficient devices that work well with low-power optical gating pulses constitute the major technical challenges of this project. Data on a YBCO superconducting thin film and a high mobility 2D electron gas is shown.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
