Novel efficient THz undulator using a laser-driven wire

• 来源期刊: 光：科学与应用（英文版）
• 关键词: diagnostic systems materials science room temperature range of photon energy
• 年，卷（期）: 2017,（2）
• 页码范围: 3-4
• 页数: 2页
• 语种: 英文
• DOI: 10.1038/lsa.2017.63

摘要

Terahertz (THz=1012 cycles per second,or T-ray) radiation sources are indispensable for modern materials science,chemical and biomedical imaging and sensing,as well as for a broad range of applications in diagnostic systems and advanced telecommunications1,2.The electromagnetic spectrum of the THz radiation is loosely characterized by the frequency range of 0.1-10 THz,or wavelengths between 30 μm and 3 mm.In particular,a low photon energy of 4.2 meV or 48 K at 1 THz,which is less than the thermal energy at room temperature,allows precise measurements with a simplified setup and very high signal-to-noise ratio in time-domain pulsed THz spectroscopy2.