[China Instrument Network Instrument Development] Finnish researchers recently created a new world record in the field of microwave detection. The research team from Aalto University’s quantum computing and equipment has successfully developed a new type of partially superconducting microwave detector that increases the thermal photodetection energy resolution by 14 times compared to previous world records. This detector, which is smaller than a single human blood cell, will significantly promote the development of ultra-sensitive cameras and quantum computer accessories.
The new detector is composed of micro-debris of superconducting aluminum and a nano-gold wire. The operating temperature is one hundredth of an absolute zero. The thermal interference at this low temperature is weak, and the team successfully detected the size. Only a single coke (negative 21st-joules of 10 joules) of energy, the energy needed to move a red cell by one nanometer.
The key to the R&D of the detector is mainly embodied in two aspects. First, the innovative structural design can simultaneously ensure the efficient absorption of incident photons and the high sensitivity of measurement readings. The second is to effectively amplify the signals generated by tiny energy packets. The research team used positive feedback to achieve the use of external energy sources to amplify the temperature changes caused by absorption of photons.
The existing superconducting technology can produce a single microwave photon, and the effective detection of such travel photons is an important challenge. The Finnish research results are a leap in the use of thermal detection to solve this problem. In addition, the smaller the detector, the more signals that can be detected and the lower the cost of mass production.
A related research paper, “Using Electrothermal Feedback to Detect Concave Microwave Pulses in Adjacently-Induced Josephson Junctions,†was published in the 2016 issue of the journal Physics Review Newsletter.
To promote the commercial application development of this new type of microwave detector, the EU Research Council has provided funding for the research team through the "proof of concept" program. This is the third time that the team has received funding from the EU Research Council.
(Original title: Finnish researchers create new world record for microwave detection)
The new detector is composed of micro-debris of superconducting aluminum and a nano-gold wire. The operating temperature is one hundredth of an absolute zero. The thermal interference at this low temperature is weak, and the team successfully detected the size. Only a single coke (negative 21st-joules of 10 joules) of energy, the energy needed to move a red cell by one nanometer.
The key to the R&D of the detector is mainly embodied in two aspects. First, the innovative structural design can simultaneously ensure the efficient absorption of incident photons and the high sensitivity of measurement readings. The second is to effectively amplify the signals generated by tiny energy packets. The research team used positive feedback to achieve the use of external energy sources to amplify the temperature changes caused by absorption of photons.
The existing superconducting technology can produce a single microwave photon, and the effective detection of such travel photons is an important challenge. The Finnish research results are a leap in the use of thermal detection to solve this problem. In addition, the smaller the detector, the more signals that can be detected and the lower the cost of mass production.
A related research paper, “Using Electrothermal Feedback to Detect Concave Microwave Pulses in Adjacently-Induced Josephson Junctions,†was published in the 2016 issue of the journal Physics Review Newsletter.
To promote the commercial application development of this new type of microwave detector, the EU Research Council has provided funding for the research team through the "proof of concept" program. This is the third time that the team has received funding from the EU Research Council.
(Original title: Finnish researchers create new world record for microwave detection)
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