Photocurrents induced by structured light
A. A. Gunyaga, M. V. Durnev, S. A. Tarasenko
Abstract
Structured light, ranging from intensity or polarization gratings to beams with fully controlled spatiotemporal structure, has great potential for use in optics and optoelectronics. This paper explores the photoresponse of a two-dimensional electron system to structured terahertz radiation and uncovers photocurrents related to the gradients of radiation intensity, polarization, and phase. The theory is applied to study the radial and azimuthal currents induced by twisted light beams carrying orbital angular momentum.
Topics & Concepts
Polarization (electrochemistry)AzimuthOpticsRadiationPhysicsTerahertz radiationOrbital angular momentum multiplexingAngular momentumLight intensityRadiant intensityElectronOptoelectronicsLight beamOrbital angular momentum of lightTotal angular momentum quantum numberNuclear physicsChemistryPhysical chemistryQuantum mechanicsOrbital Angular Momentum in OpticsPlasmonic and Surface Plasmon ResearchMetamaterials and Metasurfaces Applications