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Cryogenic photoluminescence imaging system for nanoscale positioning of single quantum emitters
Liu, Jin,Davanç,o, Marcelo I.,Sapienza, Luca,Konthasinghe, Kumarasiri,De Miranda Cardoso, José,Viní,cius,Song, Jin Dong,Badolato, Antonio,Srinivasan, Kartik American Institute of Physics 2017 Review of scientific instruments Vol.88 No.2
Balram, Krishna C.,Davanç,o, Marcelo I.,Song, Jin Dong,Srinivasan, Kartik Nature Publishing Group 2016 Nature photonics Vol.10 No.5
<P>Optomechanical cavities have been studied for applications ranging from sensing to quantum information science. Here, we develop a platform for nanoscale cavity optomechanical circuits in which optomechanical cavities supporting co-localized 1,550 nm photons and 2.4 GHz phonons are combined with photonic and phononic waveguides. Working in GaAs facilitates manipulation of the localized mechanical mode either with a radiofrequency field through the piezo-electric effect, which produces acoustic waves that are routed and coupled to the optomechanical cavity by phononic-crystal waveguides, or optically through the strong photoelastic effect. Together with mechanical state preparation and sensitive readout, we use this to demonstrate an acoustic wave interference effect, similar to atomic coherent population trapping, in which radiofrequency-driven coherent mechanical motion is cancelled by optically driven motion. Manipulating cavity optomechanical systems with equal facility through both photonic and phononic channels enables new architectures for signal transduction between the optical, electrical and mechanical domains.</P>