公开(公告)号：US20240396194A1

公开(公告)日：2024-11-28

申请号：US18202870

申请日：2023-05-26

Applicant: Google LLC

Inventor： George Earl Grant Sterling ,  Michael C. Hamilton ,  Lev Ioffe ,  Charles Neill

IPC: H01P1/20

Abstract: A microwave filter includes a multilayer stack. The multilayer stack includes one or more first-type layers composed of a first superconductor material having a first superconducting critical temperature; and one or more second-type layers composed of a non-superconductor metal or a second superconductor material having a second superconducting critical temperature that is lower than the first superconducting critical temperature. The multilayer stack is configured to behave as a dissipative metal for photons having a frequency above twice a superconducting gap frequency of the multilayer stack and to behave as a superconductor for photons having a frequency below twice the superconducting gap frequency of the multilayer stack.