Active Control of Photon Recycling for TunableOptoelectronic Materials

摘要

Optoelectronic materials are the backbone of today’s high-tech industry. Tocustomize their response, one can directly modify the atomic arrangement,chemical composition, lattice strain, or doping of the semiconductor. However,these processes frequently cause undesirable effects resulting frominduced defects. Here, a novel concept is demonstrated to actively tune theoptoelectronic response of a material through tailored photon recycling.Without altering the material’s intrinsic structure, doping, or temperature,the reabsorption of emitted photons within GaAs is modulated to control itscarrier density. This approach is used to create a diode that can change itsemission wavelength, a solar cell with improved open-circuit voltage, and anactively controlled, gate-free current modulator. These results represent a newplatform to enable materials with tailored optoelectronic response based onphotonic manipulation rather than semiconductor engineering.