chanelink logo
CHANELINK
Tiếng Việt

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

847
2024-05-08 15:36:49
Xem bản dịch

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

Đề xuất liên quan

  • Ruifeng high power ultraviolet laser will become an indispensable tool in the production of thin film solar cells in the future

    With the rise of clean energy and the enhancement of environmental awareness, thin film solar cells are gradually replacing traditional silicon-based solar cells as an efficient energy conversion device.However, to achieve efficient solar cell conversion rates, the key is to ensure that thin film solar cells have clear edges and maximize light absorption. In this regard, the unique advantages of h...

    2023-09-08
    Xem bản dịch

  • It is said that laser additive manufacturing is good, but what is the advantage?

    When it comes to additive manufacturing, some people may not have heard of it, but when it comes to its other name: 3D printing, no one is unaware.In fact, the name 'additive manufacturing' better illustrates the essence of this processing method. From ancient times to the present, humans have put in great effort to achieve the goal of processing 'raw materials into the shapes we need'. From the S...

    2023-11-08
    Xem bản dịch

  • The First Ultra Fast Laser Application Development Conference was held in Songshan Lake, Dongguan

    The First Ultra Fast Laser Application Development Conference was held in Songshan Lake, Dongguan. The first advanced attosecond laser facility in China will have 8 beam lines landing in Dongguan.Laser enjoys the reputation of being the "fastest knife," "most accurate ruler," and "brightest light," among others. As an important research direction in the laser field, ultrafast laser has always been...

    2023-10-28
    Xem bản dịch

  • A New Method for Controlling Light Polarization Using Liquid Crystal to Create Holograms

    Researchers have made significant breakthroughs in controlling optical polarization, which is a key characteristic of various applications such as augmented reality, data storage, and encryption.This new method was developed by a group of scientists using liquid crystals to create holograms, which can manipulate the polarization of light at different points. This represents a significant advanceme...

    2024-03-12
    Xem bản dịch

  • 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
    Xem bản dịch