New light control method is non-reciprocal, breaking Lorentz reciprocity, for on-chip optical isolators/ circulators without bulky magnets

https://www.eurekalert.org/news-releases/1126481

"changing material's space/ time photonic band structure by rapidly vibrating/ electrically stimulating at specific frequencies, forcing light into different states based on its travel direction... different refractive index for light moving forward than backward... can also change the light's color for signal processing... denser/ more powerful photonic computing/ microchips, cheaper/ more durable/ more accurate/ compact single-chip LiDAR, quantum networks without interference/ back-reflection, 6G and beyond"