chanelink logo
CHANELINK
Русский

Significant progress has been made in the research on the detection of microwave electric fields in the Rydberg area of Shanghai Institute of Optics and Technology

695
2024-05-08 15:36:49
Посмотреть перевод

Recently, the Aerospace Laser Technology and System Department of the Shanghai Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, and the East China Research Team of the Key Laboratory of Quantum Optics, Chinese Academy of Sciences, together with the research team of Professor Chen Liqing of East China Normal University, demonstrated a Rydberg microwave sensor with high sensitivity and high instantaneous bandwidth for the first time in rubidium Rydberg atoms. The related achievements are titled "Highly sensitive microwave electronics with enhanced instantaneous bandwidth" and published in the PHYSICAL VIEW APPLED (Letter).

Rydberg atoms are highly excited atoms with a large electric dipole moment and are highly sensitive to external electromagnetic fields. Therefore, it has been proposed to use the electromagnetic induced transparency (EIT) and Autler Townes (AT) effects of Rydberg atoms to measure microwave electric fields. The detection sensitivity and instantaneous bandwidth are key indicators for Rydberg microwave detection. Previously, based on Rydberg atomic superheterodyne detection technology, high sensitivity (55 nV cm? 1 Hz? 1/2) could be achieved, but its instantaneous bandwidth was limited to several hundred kilohertz. Having both high sensitivity and large instantaneous bandwidth is a challenge in the research field of Rydberg microwave electric field detection.

Based on six wave mixing technology, the research team experimentally demonstrated a Rydberg microwave sensor that achieves both high sensitivity and high instantaneous bandwidth in a rubidium Rydberg atomic gas chamber. With an instantaneous bandwidth of up to 10.2 MHz, the maximum detection sensitivity can reach 62nVcm-1Hz-1/2. Theoretical and experimental results indicate that the enhanced high-frequency response comes from the enhancement effect of the detection light negative sideband generated by the six wave mixing process. The research results will promote the application of Rydberg microwave sensing technology in radar and communication.

The related work has been supported by projects such as the National Natural Science Foundation of China.

Figure 1 Schematic diagram of the experimental setup for the principle (a) of the Rydberg microwave sensor

(b) (c) Two six wave mixing processes that generate positive and negative sidebands

Figure 2 Sensitivity of Rydberg Microwave Sensor (a) Relationship between Superheterodyne Signal and Signal Microwave Power (b) Sensitivity Determined by System Noise

Source: Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences

Связанные рекомендации

  • Scientists use tiny nitrogen defects in the atomic structure of diamonds as "color centers" to write data for storage

    Scientists at the City University of New York use tiny nitrogen defects in the atomic structure of diamonds as "color centers" to write data for storage. This technology is published in the journal Nature Nanotechnology and allows for encoding multiple bytes of data into the same nitrogen defect at multiple optical frequencies, without confusing the information content.The common laser based techn...

    2023-12-07
    Посмотреть перевод

  • The Indian medical laser market has entered a rapid growth mode

    According to industry forecasts, the medical laser market in India, especially in the field of medical aesthetics, is expected to be worth up to 71572 million rupees in fiscal year 2023. It is expected that this number will increase to 1.8358 billion rupees by fiscal year 2031, with a compound annual growth rate of 12.49%.Alma Medical, a global innovator in the field of medical lasers in Israel, h...

    2024-07-05
    Посмотреть перевод

  • EOS and AMCM will open a new UK Additive Manufacturing Excellence Center

    The University of Wolverhampton (UK), along with global 3D printing leaders EOS and AMCM, will collaborate to establish a new Centre of Excellence (AM) for Additive Manufacturing in the UK. This partnership will provide cutting-edge technology from EOS and AMCM, and focus on developing advanced materials and processes for high demand applications in industries such as aerospace, automotive, aerosp...

    2024-04-15
    Посмотреть перевод

  • Goethe, University of Central Florida research team showcases light and thin achromatic diffractive liquid crystal optical systems

    Headdisplay devices such as Apple Vision Pro, Meta Quest, and PICO are expected to completely change the way we perceive and interact with various digital information. By providing more direct interaction with digital information, MR has become one of the key driving forces for the metaverse, spatial computing, and digital twins, and has begun to be widely applied in fields such as intelligent tou...

    2023-09-26
    Посмотреть перевод

  • Research on LiDAR at the University of Electronic Science and Technology of China, published in Nature

    The team from the School of Information and Communication Engineering at the University of Electronic Science and Technology of China has proposed for the first time a laser radar instrument based on the dispersion Fourier transform method, forming a new demodulation mechanism. This instrument breaks through the cross limitations of measurement speed, accuracy, and distance, and has unique advanta...

    2024-06-22
    Посмотреть перевод