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Two-Photon Photovoltaic Effect

Two-photon photovoltaic effect is an energy harvesting technique based on two-photon absorption. The effect occurs when two photons are absorbed simultaneously in a semiconductor material and give rise to an electron-hole pair. The electrons and holes are then collected for electrical power generation using a p-n junction diode. The two-photon photovoltaic photovoltaic effect can be considered as the nonlinear equivalent of the conventional photovoltaic effect commonly used in p-n junction solar cells. The two-photon photovoltaic effect was first discovered in silicon and has potential for achieving energy-efficient silicon photonic integrated circuits.