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.
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