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The direct photocurrent detection capability of light orbital angular momentum (OAM) has recently been realized with topological Weyl semimetals, but it is limited to the near‐infrared wavelength range. The extension of the direct OAM detection capability to the mid‐infrared band, which is a wave band that plays an important role in a vast range of applications, has not yet been realized. This is...
Photodetectors
A photodetector based on the type‐II Weyl semimetal TaIrTe4 is designed by Dong Sun and co‐workers in article number 2201229 to directly detect the orbital angular momentum (OAM) order of the vertex beam in the mid‐infrared wavelength. The helical phase gradient of light can be distinguished by a current whose magnitude is proportional to the OAM mode number. This detector can be integrated...