Optically engineered emission: from the weak to the strong coupling regime II
14:00 Invited talk : Plasmonic, dielectric, and hyperbolic platforms for surface-enhanced spectroscopies
Imperial College London (United Kingdom) Plasmonic nanostructures serve as the main backbone of surface enhanced sensing methodologies, yet the associated optical losses lead to localized heating as well as quenching of molecules, complicating their use for enhancement of fluorescent emission. Additionally, conventional plasmonic materials are limited to operation in the visible part of the spectrum. We will elucidate how nanostructures consisting of conventional and polar dielectrics can be employed as a highly promising alternative platform.
14:20 Invited talk : Super-Coulombic Energy Transfer: Engineering Dipole-Dipole Interactions with Metamaterials
Ward Newman, Cristian Cortes, David Purschke, Amir Afshar, Zhijiang Chen, Glenda De Los Reyes, Frank Hegmann, Ken Cadien, Robert Fedosejevs, Zubin Jacob
University of Alberta (Canada) We demonstrate experimentally that hyperbolic metamaterials fundamentally alter dipole-dipole interactions conventionally limited to the near-field. The effect is captured in long-range energy transfer and lifetime reduction of donor emitters due to acceptors placed 100 nm away.
14:40 Invited talk : Quantum nanophotonics
Ginzton Laboratory (USA) By embedding a single quantum emitter inside a nanoresonator that strongly localizes optical field, it is possible to achieve a very strong light -matter interaction. The strength of this interaction is characterized by the coherent emitter-field coupling strength (g), which increases with reduction in the optical mode volume and which also sets the limit on the operational speed of such a system.
15:00 Invited talk : Nanophotonic design for bright single-photon sources based on single quantum dots
Marcelo Davanco (1),Jin Liu (1),Luca Sapienza (2),Antonio Badolato (3),Kartik Srinivasan (1)
(1)Center for Nanoscale Science and Technology National (USA) , (2)University of Southampton (United Kingdom) , (3)University of Rochester (USA) We describe the design and performance of bright single-photon sources based on individual epitaxially grown InAs quantum dots embedded in GaAs-based nanophotonic geometries. Two geometries will be discussed which can be produced via standard III-V fabrication processes, provide a moderate enhancement of spontaneous emission rate and allow spectrally broad and efficient single-photon extraction and coupling into different types of collection optics.
15:20 : Tailoring the Purcell effect with magnetic fields in graphene
W. J. M. Kort-Kamp (1),Bruno Amorim (2),G. Bastos (1),F. A. Pinheiro (1),F. S. S. Rosa (1),N. M. R. Peres (3),C. Farina (1)
(1)Universidade Federal do Rio de Janeiro (Brazil) , (2)Instituto de Ciencia de Materiales de Madrid (Spain) , (3)University of Minho (Portugal) We investigate analytically the spontaneous emission (SE) of a two-level quantum emitter near a graphene-coated substrate under the influence of a magnetic field B. We demonstrate that in the near-field regime the application of B can induce in the decay rate a variation as large as 99 percent if compared to the case where B = 0. We show that the magnetic field allows us to manipulate the different decay channels of the system.
15:35 : Chiral Purcell effect in negative-index metamaterials
SeokJae Yoo, Q-Han Park
Korea University (Korea) We present a theory of the chiral Purcell effect, describing the polarization dependent spontaneous decay rate of chiral molecules coupled to optical resonators. The chiral Purcell factor is introduced as a figure of merit for the cavity-modified differential decay rate of left and right circularly polarized modes. We also demonstrate the double fishnet structure, a class of negative-index metamaterials, possesses the high chiral Purcell factor and thus it paves the way towards a chiroptical spectroscopy in ultra-small molecular quantity.
15:50 : Transient spectroscopic study of upconversion energy transfer processes coupled with Plasmonic field
Dawei Lu, Chenchen Mao, Sungmo Ahn, Suehyun Cho, Wounjhang Park
University of Colorado at Boulder (USA) Large enhancement of upconverted luminescence by plasmonic field has been widely reported but most studies considered steady state only. Here we report the theoretical and experimental study on the transient behavior of plasmon enhanced upconverted luminescence. We observed 23-fold faster rise of upconverted luminescence with the presence of plasmonic field. The dependence of rise time on plasmonic field is theoretically predicted and verified by experiments.