Mid-Infrared Imaging Using Nonlinear Absorption in Si-Based Cameras (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Mid-Infrared Imaging Using Nonlinear Absorption in Si-Based Cameras

Caption

Artistic rendering of the principle of non-degenerate two-photon absorption (NTA) for the detection of mid-infrared (MIR) by a silicon-based camera. In this detection technique, the sensor is illuminated directly by the MIR light beam, while a second, near-infrared (NIR) beam is also incident on the sensor. The energies of the MIR and NIR photons combine to excite charge carriers in the silicon material, inducing a response in the camera. This method enables fast MIR imaging with regular Si-based cameras.

Credit

by David Knez, Adam Hanninen, Richard Prince, Eric Potma and Dmitry Fishman

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