Recently, a research team led by Prof. Guo Guangcan from the University of Science and Technology of China (USTC) demonstrated nonreciprocal routing between any two modes with different frequencies through radiation pressure force using two optical modes and two mechanical modes in a microresonator. Their work was published in Physical Review Letters.
Click here for original story, Researchers achieve nonreciprocal frequency conversion with optical and mechanical modes
Source: Phys.org