  Photon detection at microwave frequency is of great interest due to its
application in quantum computation information science and technology. Herein
are results from studying microwave response in a topological superconducting
quantum interference device (SQUID) realized in Dirac semimetal Cd3As2. The
temperature dependence and microwave power dependence of the SQUID junction
resistance are studied, from which we obtain an effective temperature at each
microwave power level. It is observed the effective temperature increases with
the microwave power. This observation of microwave response may pave the way
for single photon detection at the microwave frequency in topological quantum
materials.
