A proposed axion haloscope using shift-current difference frequency generation in the Weyl semimetal TaAs could probe QCD axions at 10-100 meV, assuming a 10^8 V/m, 100 ps THz drive field is achievable.
WISP Searches on a Fiber Interferometer under a Strong Magnetic Field
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abstract
A novel table-top experiment is introduced to detect photon-axion conversion: WISP Searches on a Fiber Interferometer (WISPFI). The setup consists of a Mach-Zehnder-type interferometer with a fiber placed inside an external magnetic field, where mixing occurs and is detected by measuring changes in amplitude. Hollow-core photonic crystal fibers (HC-PCF) will be used to achieve resonant mixing that is tuneable by regulating the gas pressure in the fiber. An unexplored axion mass-range (28 meV to 100 meV) can be probed reaching the two-photon coupling expected for the QCD axion.
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Broadband Search for Axion Dark Matter via Shift Current
A proposed axion haloscope using shift-current difference frequency generation in the Weyl semimetal TaAs could probe QCD axions at 10-100 meV, assuming a 10^8 V/m, 100 ps THz drive field is achievable.