How Two-Photon Absorption Could Double Your Solar Panel’s Light Capture
Solar photovoltaic technology stands at a critical juncture where fundamental physics meets practical innovation. While conventional solar cells harvest energy from single photons matching their bandgap energy, a quantum phenomenon called two-photon absorption opens unprecedented pathways for capturing previously unusable portions of the solar spectrum. This nonlinear optical process occurs when two lower-energy photons combine simultaneously to excite an electron, effectively doubling the energy available for charge generation.
The implications for photovoltaic efficiency are profound. Traditional silicon solar cells waste …








