Sunday, April 12, 2009

Precision Quantum Dots

One of the issues of creating quantum dots, especially in quantum computing is creating uniform quantum dots with the same cavity properties. Recently a new nano-lithography technique has been created that is capable of producing a small, regular array of high Q micro pillars that contain single quantum dots that are uniform across the array. The technique has been able to reliably produce InGaAs quantum dots over a range of sizes, shown to be tunable by controlling production temperature. These cavity couple quantum dots may be a new possibility for quantum computing because they are spatially separate, and accessible through cavity coupled excitation, meaning it may be easier to read and write information to the array.

Appl. Phys. Lett. 94, 121102 (2009); DOI:10.1063/1.3100781

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