Periodic Reporting for period 1 - COPPOLa (Complex photon-phonon coupling)
Reporting period: 2016-06-01 to 2018-05-31
matter at the nanoscale. The standard approach to do this is by creating a defect in an otherwise periodic structure, it is possible to co-localized both fields, electromagnetic and mechanical displacement, to optimize their coupling. However, in real optomechanical crystals, fabrication imperfections with respect to the ideally design structure open extra leaky channels where the transfer of energy is lost, reducing the optomechanical coupling efficiency.
In this project, we wanted to quantify the role of disorder in a paradigmatic one-dimensional optomechanical crystal with full phononic and photonic bandgaps. By adding imperfections to the ideal structure in a controllable way, we are able to explore the effect of disorder in the optomechanical coupling and the robustness of these structures against disorder. In addition, we want to show how disorder can be exploited as a resource to enhance the optomechanical coupling beyond engineered structures, thus providing a new toolset for optomechanics.
These calculations have been reported in a manuscript accepted for publication in Phys. Rev. B
Based on these calculations, we have designed the layout for electron beam lithography and the nanostructures have been fabricated. Preliminary characterization of the nanostructures show Photonic Anderson localization. We are focusing now on measuring the optomecahncial coupling.
solutions to open issues in a broad range of scientific disciplines, e.g. slowing down the dephasing time scale of spin qubits or even for thermal insulation at very low temperatures (mK).