Optical One-way Street useful for Quantum Information
Transistors, resistors, capacitors and diodes. All of these are examples of common electrical circuit elements that can be found on a computer motherboard, for instance. Billions of transistors make up a processor, with each one being less than 100 nanometers in size. This is more than 10 times smaller than the diameter of a blood cell.
Electrons carry information over tiny distances in computer circuitry. Photons are commonly used to carry information over kilometer distances. Scientists are currently developing micron-scale optical devices to either replace or be compatible with their electronic counterparts.
Researchers from JQI and the Institute for Quantum Optics and Quantum Information (IQOQI) propose using ring resonators to construct a micro-optical diode. The technology is silicon-on-insulator, making it compatible with the CMOS (complementary metal-oxide-semiconductor) fabrication processes underlying today’s computer circuits. Recently, other researchers have proposed