Lightwave‐Driven Long‐Wavelength Photomultipliers (Laser Photonics Rev. 18(1)/2024)

Lightwave‐Driven Long‐Wavelength Photomultipliers In article number 2300417, Simon J. Lange and colleagues present a metasurface‐based photomultiplier tube for long‐wavelength lightwaves. The electric field of the incident lightwaves is concentrated onto highly sub‐wavelength confinement volumes on the metasurface, which enables electrons on the metasurface to field emit into the electron multiplication unit of the photomultiplier tube for detection. The metasurface can be tuned for all infrared lightwave frequencies.