title: Dual-channel spontaneous emission of quantum dots in magnetic metamaterials.
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.
authors: Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 0200, Australia.
authors: Manuel
authors: M
authors: Decker
authors: Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 0200, Australia.
authors: Isabelle
authors: I
authors: Staude
authors: 1] National Research University for Information Technology, Mechanics and Optics (ITMO), St. Petersburg 197101, Russia [2] Ioffe Physical Technical Institute of the Russian Academy of Sciences, St Petersburg 194021, Russia.
authors: Ivan I
authors: II
authors: Shishkin
authors: 1] National Research University for Information Technology, Mechanics and Optics (ITMO), St. Petersburg 197101, Russia [2] Ioffe Physical Technical Institute of the Russian Academy of Sciences, St Petersburg 194021, Russia.
authors: Kirill B
authors: KB
authors: Samusev
authors: Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 0200, Australia.
authors: Patrick
authors: P
authors: Parkinson
authors: MQ Photonics & MQ Biophotonics Research Centers, Macquarie University, Sydney, New South Wales 2109, Australia.
authors: Varun K A
authors: VK
authors: Sreenivasan
authors: Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 0200, Australia.
authors: Alexander
authors: A
authors: Minovich
authors: Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 0200, Australia.
authors: Andrey E
authors: AE
authors: Miroshnichenko
authors: MQ Photonics & MQ Biophotonics Research Centers, Macquarie University, Sydney, New South Wales 2109, Australia.
authors: Andrei
authors: A
authors: Zvyagin
authors: Department of Electronic Materials Engineering, Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 0200, Australia.
authors: Chennupati
authors: C
authors: Jagadish
authors: Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 0200, Australia.
authors: Dragomir N
authors: DN
authors: Neshev
authors: 1] Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra, Australian Capital Territory 0200, Australia [2] National Research University for Information Technology, Mechanics and Optics (ITMO), St. Petersburg 197101, Russia.
authors: Yuri S
authors: YS
authors: Kivshar