Work

Fast passage effect in cw-ODMR of an ensemble of NV− centers

Year: 2025

Type: article

Abstract: A rapid scan technique of the magnetic field has been developed to improve excitation efficiency in continuous wave (cw)-electron spin resonance. The resulting passage effects induce significant responses of magnetizations, most notably an inversion of longitudinal magnetization. The change in longitudinal magnetization can be observed in optically detected magnetic resonance (ODMR), but the passage effect has not been investigated in cw-ODMR spectroscopy. In this study, we combine the ODMR technique with the rapid scan of the magnetic field to demonstrate the impact of fast passage effects on the field-swept cw-ODMR. An ensemble of negatively charged nitrogen-vacancy (NV-) centers in a diamond crystal is used as a model system. By selecting the fast passage adiabatic region among six distinct passage regions, efficient ODMR detection is achieved through the macroscopic control of longitudinal magnetization. Experimental results are explained by the numerical analyses of classical time-dependent Bloch equations and related rate equations under an optical cycle. This knowledge paves the way for the facilitation of versatile applications of ODMR for quantum sensors.

Source: The Journal of Chemical Physics

DOI: 10.1063/5.0246183

Authors: Yusuke Maki, Hideto Matsuoka, Ikuko Akimoto

Institutions: Wakayama University, Hokkaido University of Education, Osaka Metropolitan University

Language: English

Topic: Diamond and Carbon-based Materials Research

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funder: Japan Society for the Promotion of Science

Award: Quantitative evaluation of spin-orbit interaction to develop higher-efficient organic room temperature phosphorescence materials