English

New type of "dynamic static dual sensing" charge coupled phototransistor

529
2025-04-17 18:24:30
See translation

With the development of cutting-edge technologies such as automatic guidance and embodied intelligence, machine vision has put forward higher requirements for image acquisition, requiring precise recording of static images and the ability to sensitively capture dynamic changes in the scene. The existing dynamic and active pixel sensor technology integrates two functions: dynamic event detection and grayscale image acquisition. However, each pixel usually requires dozens of transistors and circuit components, and the structure is complex, the power consumption is high, the integration difficulty is high, and it also faces engineering challenges such as high-speed clock synchronization.

In response to the above issues, the team led by Sun Dongming, a researcher at the Institute of Metals, Chinese Academy of Sciences, has proposed a new "dynamic static dual sensing" charge coupled phototransistor. This type of transistor only requires one device unit to synchronously achieve dynamic and static image information acquisition. The related research results, titled A charge coupled phototransistor enabling synchronous dynamic and static image detection, were published in Advanced Materials.

This study designed a gate structure of "upper and lower dual photosensitive capacitors". The upper gate shields electrons through a thicker dielectric layer, causing stable current changes in the device for capturing grayscale images; The lower gate uses a thinner dielectric layer to allow electrons to tunnel and form transient current pulses, specifically designed to capture dynamic events. Through this unique charge coupled grating mechanism, independent response of static images and dynamic events has been achieved within a transistor. Tests have shown that the dynamic range of the device reaches 120 dB, the response speed is as fast as 15 μ s, and the power consumption is only 10 pW, which is only one thousandth of traditional dynamic and active pixel sensor devices.

The above achievements have reduced power consumption, facilitated large-scale integration, and fundamentally solved the problem of high-speed clock synchronization. At the same time, this invention can be made using two-dimensional materials or one-dimensional carbon nanotubes, with good material universality.

 



Structure and characterization of charge coupled phototransistors


The research work was supported by the National Natural Science Foundation of China, the National Key Research and Development Program, and related projects of the Chinese Academy of Sciences.

Source: opticsky

Related Recommendations
  • Aalyria plans to establish a laser link mesh network to quickly transmit data on land, in the air, in the ocean, and in space

    Aalyria is establishing a laser link mesh network to quickly transmit data on land, in the air, in the ocean, and in space. The maritime part of the plan is about to be pushed forward.Recently, this DC based laser communication network company announced the signing of a memorandum of understanding with HICO Investment Group, which focuses on investing in shipping and logistics companies. According...

    2023-10-26
    See translation
  • Laser based ultra precision gas measurement technology

    Laser gas analysis can achieve high sensitivity and selectivity in gas detection. The multi-component capability and wide dynamic range of this detection method help analyze gas mixtures with a wide concentration range. Due to the fact that this method does not require sample preparation or pre concentration, it is easy to adopt in the laboratory or industry.Gas analysis is crucial for determining...

    2024-01-03
    See translation
  • Lorenz competes in the LiDAR market with MEMS galvanometer technology

    At the recently concluded 2024 International Consumer Electronics Show (CES), automotive related technologies and solutions shone brightly, and a group of Chinese LiDAR suppliers competed on the same stage.The technologically advanced products, systematic solutions, continuously increasing delivery and market retention have to some extent proven that in the context of the development of automotive...

    2024-04-13
    See translation
  • Yawei Group and Zhonggang Metal signed a complete set of sheet metal laser processing equipment to assist in the development of curtain wall materials industry

    Recently, Yawei Group signed a complete set of sheet metal laser processing equipment with Hubei Zhonggang Metal Xianning Second Production Base, adding bricks and tiles to the takeoff of Zhonggang Metal Business. After full production, the annual production of various aluminum metal plates will exceed 6 million square meters, and Zhonggang Metal will usher in another leap forward development!Zhon...

    2023-11-03
    See translation
  • Ruisheng Clyde Aerospace Company Commercializes TNO's Satellite Communication Laser Terminal

    AAC Clyde Space, a small satellite technology multinational company headquartered in Uppsala, Sweden, has obtained the right to manufacture and distribute laser satellite communication terminals using the optical technology of the Dutch research institution TNO.TNO's technology helps to transmit satellite generated data to Earth through lasers, with the potential to achieve high speed and security...

    2024-05-24
    See translation