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A device for self-tracking a light source, including a focusing optical device configured to focus incoming light to a focal spot, an adaptive device configured to reflect the light of the focal spot and arranged to provide for a phase change at an area of the focal spot of the incoming light to generate a reflected light, and a light guide located between the focusing optical device and the adaptive device, the light guide configured to capture the reflected light of the adaptive device.
Michael Graetzel, Shaik Mohammed Zakeeruddin, Fan Fu, Hongwei Zhu, Chunyang Zhang
Sophia Haussener, Silvan Suter, Etienne Boutin, Mahendra Patel