Extended Data Fig. 10: Optical spin orientation using broadband excitation for device B.
From: Optical control over topological Chern number in moiré materials
Magnetic hysteresis loop measured at ν = −1 using σ+-polarized and σ−-polarized light with 100 nm power and broad bandwidth spanning from about 1,030 to about 1,120 nm. Even though the hysteresis shows slight dependence on the helicity of the exciting beam, the spin–valley degree of freedom cannot be optically flipped at B = 0, in contrast to the case of narrowband excitation exploited in the main text.
