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Mar 18 – 22, 2021
Stony Brook, NY
US/Eastern timezone

A Cooper pair transistor single photon detector with quantum enhanced sensitivity

Mar 19, 2021, 2:00 PM
15m
Stony Brook, NY

Stony Brook, NY

Online [US/EST Timezone]
Photodetectors Photodetectors

Speaker

Dr Juliang Li (Argonne National Laboratory)

Description

We propose the design of an ultra-sensitive THz photon detector based on a superconducting Cooper Pair Transistor (CPT). A photon absorber is connected to the gate electrode, which is coupled to a quarter wavelength coplanar-waveguide (CPW) resonator. Photon-generated quasiparticles in the absorber modify the charge on the gate, which modulates the resonator inductance that results in a shift of the resonant frequency of the CPW resonator. The exceptional charge sensitivity of the CPT provides an ideal architecture to realize a THz detector architecture capable of detecting single THz photons. Furthermore, the inherent non-linearity of the CPT allows parametric amplification by pumping on the CPT Josephson inductance to further enhance the detector sensitivity. I will present an overview of the device design, preliminary simulations, and provide initial estimates of the detector sensitivity. Phosphor

Primary author

Dr Juliang Li (Argonne National Laboratory)

Co-author

Dr Pete Barry (Argonne National Laboratory)

Presentation materials