Quantum physical effects can lead to entirely new possibilities in microscopic imaging. The nonlinear process of spontaneous parametric downconversion converts a pump photon into a signal and an idler photon of different wavelengths, e.g. visible (VIS) and near-infrared (NIR). Whereas the NIR light is illuminating the sample to be imaged, the VIS light gets detected by a camera. Even though the NIR light is not detected, the image can be reconstructed from the VIS light on the camera.
Within this work a nonlinear interferometer will be realized and investigated for imaging of microscopic samples. A spatial light modulator will be implemented to introduce a helical point-spread function in order to achieve a depth resolution.
The aim is to achieve a label-free, contrast-based 3D microscopic imaging in the near-infrared spectral range with high quantum efficiency without having to use special infrared components.
Contact
Dr. Lars Büttner, BAR 28, fon 463-35314,
Email: Lars.Buettner@tu-dresden.de
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