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Items tagged with "photonic crystal"

February 12, 2018

New hole-punched crystal clears a path for quantum light

Optical highways for light are at the heart of modern communications. But when it comes to guiding individual blips of light called photons, reliable transit is far less common. Now, a collaboration of researchers from the Joint Quantum Institute (JQI), led by JQI Fellows Mohammad Hafezi and Edo Waks, has created a photonic chip that both generates single photons, and steers them around. The device, described in the Feb.

February 8, 2016

Nanoscale cavity strongly links quantum particles

Scientists have created a crystal structure that boosts the interaction between tiny bursts of light and individual electrons, an advance that could be a significant step toward establishing quantum networks in the future.

April 4, 2013

Quantum Dot

Quantum dots are effectively “artificial atoms.” They are nanocrystals of semiconductor wherein an electron-hole pair can be trapped. The nanometer size is comparable to the wavelength of light and so, just like in an atom, the electron can occupy discrete energy levels. The dots can be confined in a photonic crystal cavity, where they can be probed with laser light. 

March 19, 2013

Photonic crystal

Photonic crystals (PCs) are extremely small structures, typically no more than a few micrometers on a side, which are made of alternating regions of insulating material and air. One way this can be achieved is by drilling or etching holes in the material at regular intervals in a grid pattern. A beam of photons passing through a PC thus experiences periodic changes in refractive index – high in the insulator, low in the air holes.