Optical Transition-Edge Sensors: Dependence of System Detection Efficiency on Wavelength
Optical Transition-Edge Sensors: Dependence of System Detection Efficiency on Wavelength
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DOI：
10.1109/tim.2018.2882217
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发表时间：
2019-06-01
影响因子：
5.6
通讯作者：
Fukuda, Daiji
中科院分区：
文献类型：
--
作者：
Hattori, Kaori;Inoue, Shuichiro;Fukuda, Daiji
光学渡越边传感器（Optical transition-edge sensors，TES）能够分辨出单个光子的能量，在量子信息和生物学领域有着广泛的应用。TES可以提供从近红外到可见光区域的光谱，并有可能揭示生物学中的新现象。在本文中，我们已经调查了在近红外和可见光波长的TES的光子的响应，从450到1000 nm的10 nm的增量使用超连续谱激光器和可调谐带通滤波器，将多色光源转换成单色光。优化后的光学TES在950 nm处的光子探测的系统探测效率在某些波长处接近100%，并且对于整个带宽超过10%。我们发现，探测器的响应强烈依赖于波长。在较短波长处的过滤光的光谱更可能示出能量低于主峰的能量的第二峰。
Optical transition-edge sensors (TESs) that can resolve the energy of a single photon have been proven useful in quantum information and biology. TESs can provide spectra ranging from near-infrared to visible regions and have the potential to reveal new phenomena in biology. In this paper, we have investigated the responses of TESs to photons at near-infrared and visible wavelengths, from 450 to 1000 nm in 10-nm increments using a supercontinuum laser and a tunable bandpass filter, which converted the multichromatic light source into monochromatic light. The system detection efficiency of an optical TES optimized for photon detection at 950 nm was nearly 100% at some wavelengths and was more than 10% for the overall bandwidth. We found that the detector responses strongly depended on the wavelengths. A spectrum of the filtered light at shorter wavelengths was more likely to show a second peak with energy lower than that of the primary peak.