Koike Takeru, Muneoka Hitoshi, Terashima Kazuo, Ito Tsuyohito
Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan.
Phys Rev Lett. 2022 Jul 15;129(3):033202. doi: 10.1103/PhysRevLett.129.033202.
Nonintrusive optical measuring of electric fields in space is crucial for various sciences and technologies. In this study, a simple and highly sensitive optical electric field measurement is demonstrated in high-pressure hydrogen by performing electric-field-induced coherent anti-Stokes Raman scattering (E-CARS) in the visible region. The minimum detectable electric field is 0.5 V/mm at atmospheric pressure. This method does not require excited or atomic species and shows a considerably higher sensitivity than those demonstrated by the commonly applied E-CARS method in the infrared region and electric-field-induced second-harmonic generation. This method can be applied to various Raman-active molecules.
对空间中的电场进行非侵入式光学测量对各种科学和技术至关重要。在本研究中，通过在可见光区域进行电场诱导的相干反斯托克斯拉曼散射（E-CARS），在高压氢气中展示了一种简单且高度灵敏的光电场测量方法。在大气压下，最小可检测电场为0.5 V/mm。该方法不需要激发或原子种类，并且比在红外区域常用的E-CARS方法和电场诱导二次谐波产生所展示的灵敏度高得多。该方法可应用于各种拉曼活性分子。
