Dual-channel spontaneous emission of quantum dots in magnetic metamaterials

Manuel Decker (), Isabelle Staude, Ivan I. Shishkin, Kirill B. Samusev, Patrick Parkinson, Varun K. A. Sreenivasan, Alexander Minovich, Andrey E. Miroshnichenko, Andrei Zvyagin, Chennupati Jagadish, Dragomir N. Neshev and Yuri S. Kivshar
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Manuel Decker: Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University
Isabelle Staude: Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University
Ivan I. Shishkin: National Research University for Information Technology, Mechanics and Optics (ITMO)
Kirill B. Samusev: National Research University for Information Technology, Mechanics and Optics (ITMO)
Patrick Parkinson: Research School of Physics and Engineering, The Australian National University
Varun K. A. Sreenivasan: MQ Photonics & MQ Biophotonics Research Centers, Macquarie University
Alexander Minovich: Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University
Andrey E. Miroshnichenko: Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University
Andrei Zvyagin: MQ Photonics & MQ Biophotonics Research Centers, Macquarie University
Chennupati Jagadish: Research School of Physics and Engineering, The Australian National University
Dragomir N. Neshev: Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University
Yuri S. Kivshar: Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University

Nature Communications, 2013, vol. 4, issue 1, 1-10

Abstract: Abstract Metamaterials, artificial electromagnetic media realized by subwavelength nano-structuring, have become a paradigm for engineering electromagnetic space, allowing for independent control of both electric and magnetic responses of the material. Whereas most metamaterials studied so far are limited to passive structures, the need for active metamaterials is rapidly growing. However, the fundamental question on how the energy of emitters is distributed between both (electric and magnetic) interaction channels of the metamaterial still remains open. Here we study simultaneous spontaneous emission of quantum dots into both of these channels and define the control parameters for tailoring the quantum-dot coupling to metamaterials. By superimposing two orthogonal modes of equal strength at the wavelength of quantum-dot photoluminescence, we demonstrate a sharp difference in their interaction with the magnetic and electric metamaterial modes. Our observations reveal the importance of mode engineering for spontaneous emission control in metamaterials, paving a way towards loss-compensated metamaterials and metamaterial nanolasers.

Date: 2013
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DOI: 10.1038/ncomms3949

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