High Temperature Superconductors for single photon detection – HECTOR
Superconducting Single Photon Detectors (SSPD) are central element for numerous applications including time-of-time imaging and quantum cryptography systems. They consist of superconducting nanowires biased near their critical current. A (visible or near IR) photon absorption creates a hotspot that is converted into a measurable voltage pulse. Low-Tc SSPD have the best performances at 4K but need energy-consuming 4K cryogenics. We propose to fabricate high-Tc SSPD with YBa2Cu3O7 and Bi2Sr2CaCu2O8+x that will operate at higher temperature (40K) with simplified cryogenics and at higher frequency, and to investigate the far-from-being-understood microscopic mechanism leading to hotspot formation. We will perform global transport measurements on a biased YBCO and field effect tunable BiSCCO nanowires. We will explore the phase diagram influence on the development of a hotspot. This will give information about the physics of the systems, and will help improving high Tc SSPDs.
Madame Cheryl Feuillet-Palma (Laboratoire de Physique et d'Etude des Matériaux)
The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.
LPEM Laboratoire de Physique et d'Etude des Matériaux
Help of the ANR 240,125 euros
Beginning and duration of the scientific project: March 2022 - 36 Months