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Kaori Hattori

QUP Principal Investigator

Senior Researcher / Associate Professor
AIST Research Institute for Physical Measurement / KEK


I have been working on developments of detectors to achieve high precision and high sensitivity. My goal is to obtain scientific results that will lead to breakthroughs, using such the detectors. In graduate school, I developed an X-ray imaging detector for small-angle scattering to reveal structure of materials on the 1-100 nm scale using synchrotron radiation, and received Ph.D. After this, I worked on superconducting detector array readout for ground-based experiment POLARBEAR-2 and satellite observation experiment LiteBIRD for CMB B-mode polarization observation. Since 2016, I have been conducting research at AIST on superconducting detectors that are sensitive to visible and near-infrared photons.

Research Content

We are developing optical transition-edge sensors (TESs), which is based on the superconducting transition that materials exhibit at low temperatures. The size of optical TESs is reduced to be sensitive to energy deposition of a few eV. TESs can detect a wide range of light from visible to near-infrared. We have achieved high energy resolution of 67 meV (FWHM) at 0.8 eV. TESs coupled with fibers exhibited extremely high detection efficiency of nearly 100%. The optical TESs have been applied to quantum computation, quantum information communication, and bio-imaging. Taking advantage of the high energy resolution of optical TES, we will start a new dark matter search experiment at QUP. TESs could be a new probe that detects single electron at several eV. We are also interested in new research using light.

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