Science Daily February 15, 2018
Researchers at the University of Maryland created a photonic chip that both generates single photons and steers them around. In the new chip, they etched out thousands of triangular holes in an array that resembled a bee’s honeycomb. Along the center of the device they shifted the spacing of the holes, which opens a different kind of travel lane for the light. The team tested the capabilities of the chip by first changing a quantum emitter from its lowest energy state to one of its two higher energy states. When they used photons from the two higher energy states, the photons preferred to travel in opposite directions which was evidence of the underlying crystal topology. The research may lead to new types of optical devices and enable tailored interactions between quantum light emitters or other kinds of matter… read more. TECHNICAL ARTICLE
Fabricated device and band structure. Credit: Science 09 Feb 2018: Vol. 359, Issue 6376, pp. 666-668, DOI: 10.1126/science.aaq0327