Applications of Vapor-Cell-Based Atomic Electrometry

Yi-Hsin Chen^1,2*, Hsuan-Jui Su¹, Jia-You Liou¹, I-Chun Lin¹, Yu-Chi Chen¹, Shao-Cheng Fang¹

¹Department of Physics, National Sun Yat-Sen University, Kaohsiung, Taiwan
²Center for Quantum Technology, Hsinchu, Taiwan

* Presenter:Yi-Hsin Chen, email:yihsin.chen@mail.nsysu.edu.tw

We provide an overview of the EIT effect, thermal atomic electrometry, quantum sensor, and quantum-state manipulation. The study in miniaturized systems with thermal vapors will be present, such as photonic-crystal fibers, microcells, and optical waveguides. A highly sensitive, portable, and integrable quantum device is helpful to sense the magnetic fields of the human brain via the use of optically pumped magnetometer (OPM). The atomic transitions involving Rydberg state can be applied for detecting DC to THz external electric fields or measuring atomic interactions between atoms. We have demonstrated a narrow and high contrast EIT feature after optimizing the laser intensity and optical density of the medium. Our investigation advances applications such as dipole-dipole interaction in highly excited Rydberg states and traceable detection as a quantum sensor. The future goals of these studies are the generations of multiple quantum bits and the demonstration of multichannel magnetoencephalography (MEG) system by using vapor cells.

Keywords: Rydberg atom, EIT, OPM, quantum sensor