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
Stony Brook, NY

Stony Brook, NY

Online [US/EST Timezone]
Photodetectors Photodetectors


Dr Juliang Li (Argonne National Laboratory)


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)


Dr Pete Barry (Argonne National Laboratory)

Presentation materials