Publications (2)3.59 Total impact
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Article: Titanium-based transition-edge photon number resolving detector with 98% detection efficiency with index-matched small-gap fiber coupling.
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ABSTRACT: We have realized a high-detection-efficiency photon number resolving detector at an operating wavelength of about 850 nm. The detector consists of a titanium superconducting transition edge sensor in an optical cavity, which is directly coupled to an optical fiber using an approximately 300-nm gap. The gap reduces the sensitive area and heat capacity of the device, leading to high photon number resolution of 0.42 eV without sacrificing detection efficiency or signal response speed. Wavelength dependent efficiency in fiber-coupled devices, which is due to optical interference between the fiber and the device, is also decreased to less than 1% in this configuration. The overall system detection efficiency is 98%±1% at wavelengths of around 850 nm, which is the highest value ever reported in this wavelength range.Optics Express 01/2011; 19(2):870-5. · 3.59 Impact Factor -
Conference Proceeding: Fiber Coupled Single Photon Detector with Niobium Superconducting Nanowire.
Quantum Communication and Quantum Networking, First International Conference, QuantumComm 2009, Naples, Italy, October 26-30, 2009, Revised Selected Papers; 01/2009
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- Optics Express (1)
Institutions
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2011
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National Institute of Advanced Industrial Science and Technology
Ibaraki, Osaka-fu, Japan
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