Archives July 2025

congratulation to Our new paper in Journal of Pioneering Advances in Materials

High Signal to Noise Ratio in Miniaturized Atomic Cells by Frequency Modulation Spectroscopy Method

A. Mirazei, M. Sotoudeh, M. Asadolahsalmanpour, M. Mosleh, S. M. Hamidi

Magneto-plasmonic Lab, Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran.

DOI:10.48308/piadm.2025.105969

Abstract:

Miniaturized atomic vapor cells are emerging as essential components in various applications such as brain signal tracking, nitrogen-vacancy center magnetometry, and electric and magnetic field sensing. However, achieving a high signal-to-noise ratio (SNR) in these compact systems remains a key challenge, which can be addressed using selective spectroscopic techniques. In this study, we present a novel type of atomic vapor cell based on hot rubidium vapor, designed to enhance the spatial resolution of magnetometers. We also demonstrate the advantages of frequency modulation spectroscopy in improving spectral resolution. The cells are fabricated under a base pressure of 10⁻³ mbar and filled with nitrogen gas in a clean vacuum environment. The integration of these miniaturized cells with spectroscopic techniques enables their use in laser feedback loops to lock onto specific atomic transitions. This approach provides new possibilities for next-generation quantum technologies, including quantum sensors, atomic clocks, and quantum computing systems.

Schematic diagram of the experimental setup, with the circular cell shown in the inset

congratulation to Dear Dr Salmanpour for her PhD defense

congratulation to Our new paper in Journal of nanophotonics and nanostructure

Exploring the Interaction between Bloch Surface Waves and Atomic Hot Vapor: A Theoretical Perspective

A.Sohrabi, M. Asadolah Salmanpour, M. Mosleh, S. M. Hamidi,*

Abstract:

The miniaturization of atom-light interaction platforms is pivotal for the advancement of modern optical technologies, enabling significant improvements in sensing, communication, and quantum information processing. In this paper, we present a theoretical investigation onto the coupling of Bloch surface waves (BSWs) of one-dimensional photonic crystal with atomic hot vapor, emphasizing the miniaturization of atomic structures. These surface waves are known for their strong field confinement and high sensitivity to environmental changes which offer a promising avenue for enhancing light-matter interactions at reduced scales. Our findings highlight the potential of Bloch surface waves to enhance and control the localized density of states thus improving the resolution of atomic transition lines. This study underscores the importance of integrating Bloch surface waves with atomic hot vapor for developing next-generation miniaturized optical devices, which can lead to breakthroughs in precision metrology, high-resolution spectroscopy, and quantum technologies.