论文标题
具有高能分辨率的光学过渡边缘传感器
An optical transition-edge sensor with high energy resolution
论文作者
论文摘要
光学过渡边缘传感器已显示出用于解决电信波长处入射光子数量的能量分辨率。生物成像和显微镜光谱需要较高的能量分辨率。在本文中，我们报告了显示高能量分辨率的Au/Ti（10/20 nm）双层TE。这是通过将临界温度TC降低到115 MK来实现的，在0.8 eV时，最大最大（FWHM）的最大宽度为67 MEV。当TC降低至115 MK时，考虑到光学苔丝的典型能量分辨率为150 MEV，TC为300 MK，理论分辨率将扩展到30 MeV FWHM。为了研究理论期望（30 MEV）与测量值（67 MEV）之间的差距，我们测量了其复杂的阻抗和电流噪声。我们发现TES中的Johnson噪声过多，在偏置点，过量的Johnson术语M为1.5，因为电阻为正常电阻的10％。作为参考，将TE与显示典型能量分辨率的TE进行了比较（156 MEV FWHM）。我们将讨论如何改善能源解决方案以及可能是其中的限制因素。
Optical transition-edge sensors have shown energy resolution for resolving the number of incident photons at the telecommunication wavelength. Higher energy resolution is required for biological imaging and microscope spectroscopy. In this paper, we report on a Au/Ti (10/20 nm) bilayer TES that showed high energy resolution. This was achieved by lowering the critical temperature Tc to 115 mK and the resultant energy resolution was 67 meV full width at half maximum (FWHM) at 0.8 eV. When Tc was lowered to 115 mK, the theoretical resolution would scaled up to 30 meV FWHM, considering that the typical energy resolution of optical TESs is 150 meV and Tc is 300 mK. To investigate the gap between the theoretical expectation (30 meV) and the measured value (67 meV), we measured its complex impedance and current noise. We found excess Johnson noise in the TES and an excess Johnson term M was 1.5 at a bias point where the resistance was 10% of normal resistance. For reference, the TES was compared with a TES showing typical energy resolution (156 meV FWHM). We will discuss what improved the energy resolution and what might have been the limiting factor on it.
