Linear diffraction gratings that provide strongly asymmetric diffraction without surface modulation are created and studied. The spatial phase shift of the refractive-index grating relative to the absorption grating is the origin of nonreciprocal behavior.
© 1999 Optical Society of America
Rouslan Birabassov, Ararat Yesayan, and Tigran V. Galstyan, "Nonreciprocal diffraction by spatial modulation of absorption and refraction," Opt. Lett. 24, 1669-1671 (1999)