简体中文

Researchers have successfully developed the world's first superconducting broadband photon detector

870
2023-11-02 14:44:08
查看翻译

Researchers at the National Institute of Information and Communication Technology in the United States have invented a new structure of a superconducting strip photon detector that can achieve efficient photon detection even in wide strips, and have successfully developed the world's first superconducting wide strip photon detector.

The band width of the detector is more than 200 times that of traditional superconducting nanoband photon detectors. This technology helps to solve the problems of low productivity and polarization dependence in traditional SNSPD. The new SWSPD is expected to be applied to various advanced technologies such as quantum information communication and quantum computers, enabling these advanced technologies to be applied in society as soon as possible.

This work is published in the journal Optical Quantum.
Photon detection technology is a strategic core technology that is currently being intensively researched and developed globally in many advanced technology fields such as quantum information communication and quantum computing to achieve innovation. It is also an innovative technology in fields such as live cell fluorescence observation, deep space optical communication, and laser sensing.

The NICT research team has developed an SNSPD with a band width of 100 nm or less. They successfully achieved high-performance beyond other photon detectors and applied them to quantum information communication technology, proving their practicality. 

However, the preparation of SNSPDs requires the use of advanced nanoprocessing techniques to form nanoband structures, which can lead to changes in detector performance and hinder the improvement of productivity. In addition, the polarization dependence of superconducting nanoribbons due to their winding structure also limits their application as photon detectors.

In this work, NICT invented a new structure called "high critical current group structure", which can achieve efficient photon detection even by widening the band width in superconducting strip photon detectors. It successfully developed a SWSPD with a width of 20 microns, which is more than 200 times wider than traditional nanostrip photon detectors, and achieved high-performance operation for the first time in the world.

The nanobelt type developed by NICT requires the formation of extremely long superconducting nanobelts with a bandwidth of 100 nm or less, in a winding and tortuous shape. The broadband type can now be formed using only a single short straight superconducting tape.

This SWSPD does not require nanomachining technology and can be manufactured through high productivity universal lithography technology. In addition, due to the wider bandwidth of the stripe compared to the incident light spot illuminated from the optical fiber, polarization dependence in the nanostrip detector can be eliminated.

Through the performance evaluation of the detector, the detection efficiency in the telecommunications band is 78%, which is equivalent to 81% of the nanoband type. In addition, the numerical value of timing jitter is better than that of nanostrip type.

Compared with the nanobelt type, this achievement enables photon detectors to have higher productivity and superior performance and characteristics. Nanobelt type has been positioned as an indispensable photon detection technology in advanced technology fields such as quantum information communication. This technology is expected to be applied to various quantum information communication technologies and become an important foundational technology for achieving the networked quantum computer advocated by JST's lunar landing goal 6.

In the future, the team will further explore the HCCB structure in SWSPD, which can efficiently detect photons not only in the telecommunications band, but also in a wide range of wavelengths from visible light to mid infrared. In addition, they will also attempt to further expand the size of the photon receiving area to expand applications such as deep space optical communication technology, laser sensing, and live cell observation.

Source: Laser Network

相关推荐
  • Han's Laser's net profit in the third quarter decreased by 45.37% year-on-year

    Recently, Han's Laser released a third quarter report, stating that the company achieved a revenue of 3.301 billion yuan in the third quarter, a year-on-year decrease of 8.96% (after adjustment); The net profit attributable to shareholders of the listed company was 209 million yuan, a year-on-year decrease of 45.37% (after adjustment).During the reporting period, the company's operating profit, to...

    2023-10-25
    查看翻译
  • Devices based on optical thermodynamics can guide light without the need for switches

    Researchers from Ming Hsieh's Department of Electrical and Computer Engineering at the University of Southern California have designed the first optical device that follows the emerging optical thermodynamic framework.The work, reported in Nature Photonics, introduces a new way of routing light in nonlinear systems—meaning systems that do not require switches, external control, or digital addressi...

    10-15
    查看翻译
  • Breakthrough in Light Manipulation: Revealing New Finite Barrier Bound States

    Exploring the propagation and localization of waves in various media has always been a core focus of optics and acoustics. Specifically, in photonics and phononics, scientists have been dedicated to understanding and controlling the behavior of light and sound waves in periodic media.Photonic crystals have unique bandgap characteristics, providing an excellent platform for studying wave propagatio...

    2024-03-25
    查看翻译
  • Industrial laser giant Coherent receives $33 million investment

    Recently, according to media reports, industrial laser giant Coherent has signed a "preliminary terms memorandum" with the US Department of Commerce, which will receive up to $33 million in investment under the Chip and Science Act.It is reported that the funds will mainly be used to support the modernization and expansion project of the cutting-edge manufacturing cleanroom in Coherent's existing ...

    2024-12-12
    查看翻译
  • Jingyi Optoelectronics launches a transmittance detector to detect the near-infrared transmittance characteristics of plastic materials

    Laser welding plastic transmittance tester is an important industrial testing equipment used to measure the transmittance of plastic after welding, in order to evaluate welding quality and product performance. With the widespread application of plastic products in various fields, the requirements for plastic welding quality and transparency are also increasing. Therefore, laser welded plastic tran...

    2024-04-11
    查看翻译