Fig. 3: Optical spin injection.
From: Spin detector for panchromatic circularly polarized light detection
a Schematic diagram for spin-dependent optical transition. b Photogalvanic current as a function of the rotation angle of QWP (α), measured at room temperature. The black dots are measured data. The red solid line is the fitting line using Eq. (4). c The σ+ and σ− CPL emission spectra of MAPbBr3 film under σ+ CPL and σ− CPL (top) excitation at 77 K. d Degree of circular polarization of CPL as a function of temperature for MAPbBr3 film. e The gcurrent value as a function of magnetic field intensity. The inset shows the carrier spin processes around the B direction. f The gcurrent value as a function of the rotation angle of QWP for S-2D/3D perovskite with the active layers of MAPbBr3, FAPbBr3 and CsPbBr3, respectively, under 532 nm irradiance. In the experimental setup, as illustrated in Supplementary Fig. 22, the initial angle between the fast axis of the QWP and the polarization direction of the incident linearly polarized light is set as 45°, not as 0°. This initial configuration directs σ− CPL onto the S-2D/3D detector. Source data are provided as a Source Data file.
