Speaker: Manojkumar, Vishwakarma (Wigner FK)
Title: Three-dimensional magnetic field sensing using alkali atoms
Date: Tuesday 15. September, 10:00
Place: 1-es épület tanácsterem
Abstract:
Alkali atoms are promising candidates for highly sensitive magnetic field detection, with sensitivities reaching tens of fT/√Hz regime [1]. Conventional magnetometry using alkali-atomic vapor relies on the absorption and transmission of light, typically using point-detection technique with photodiodes. Despite being highly sensitive, this approach does not retain information about the spatial direction of the magnetic field. However, by the spatial shaping of the polarization of input optical beam, spatial varying atom-light interaction can be made sensitive to the orientation of the magnetic field. The resulting spatial dependence of the optical absorption and transmission encodes information about the magnetic field vector enabling the measurement of strength and orientation of the magnetic field. This talk is based on investigating the measurement of the magnetic field strength and orientation by the interaction of a radially polarized beam with Rubidium atoms at room temperature.
[1] Kitching, John, et al. "Uncooled, millimeter-scale atomic magnetometers with femtotesla sensitivity." SENSORS, 2009 IEEE. IEEE, 2009.
