44 research outputs found
Ultrabright room-temperature single-photon emission from nanodiamond nitrogen-vacancy centers with sub-nanosecond excited-state lifetime
Ultrafast emission rates obtained from quantum emitters coupled to plasmonic
nanoantennas have recently opened fundamentally new possibilities in quantum
information and sensing applications. Plasmonic nanoantennas greatly improve
the brightness of quantum emitters by dramatically shortening their
fluorescence lifetimes. Gap plasmonic nanocavities that support strongly
confined modes are of particular interest for such applications. We demonstrate
single-photon emission from nitrogen-vacancy (NV) centers in nanodiamonds
coupled to nanosized gap plasmonic cavities with internal mode volumes about 10
000 times smaller than the cubic vacuum wavelength. The resulting structures
features sub-nanosecond NV excited-state lifetimes and detected photon rates up
to 50 million counts per second. Analysis of the fluorescence saturation allows
the extraction of the multi-order excitation rate enhancement provided by the
nanoantenna. Efficiency analysis shows that the NV center is producing up to
0.25 billion photons per second in the far-field
Broadband enhancement of spontaneous emission from nitrogen-vacancy centers in nanodiamonds by hyperbolic metamaterials
We experimentally demonstrate a broadband enhancement of emission from nitrogen-vacancy centers in nanodiamonds. The enhancement is achieved by using a multilayer metamaterial with hyperbolic dispersion. The metamaterial is fabricated as a stack of alternating gold and alumina layers. Our approach paves the way towards the construction of efficient single-photon sources as planar on-chip devices. (C) 2013 AIP Publishing LLC
Temperature-Dependent Dynamic Response to Flash Heating of Molecular Monolayers on Metal Surfaces: Vibrational Energy Exchange
Understanding the Role of Nonresonant Sum-Frequency Generation from Polystyrene Thin Films
Ultrabright Room-Temperature Sub-Nanosecond Emission from Single Nitrogen-Vacancy Centers Coupled to Nanopatch Antennas
Interfacial Processes of a Model Lithium Ion Battery Anode Observed, in Situ, with Vibrational Sum-Frequency Generation Spectroscopy
Ultrabright Room-Temperature Sub-Nanosecond Emission from Single Nitrogen-Vacancy Centers Coupled to Nanopatch Antennas
Solid-state
quantum emitters are in high demand for emerging technologies
such as advanced sensing and quantum information processing. Generally,
these emitters are not sufficiently bright for practical applications,
and a promising solution consists in coupling them to plasmonic nanostructures.
Plasmonic nanostructures support broadband modes, making it possible
to speed up the fluorescence emission in room-temperature emitters
by several orders of magnitude. However, one has not yet achieved
such a fluorescence lifetime shortening without a substantial loss
in emission efficiency, largely because of strong absorption in metals
and emitter bleaching. Here, we demonstrate ultrabright single-photon
emission from photostable nitrogen-vacancy (NV) centers in nanodiamonds
coupled to plasmonic nanocavities made of low-loss single-crystalline
silver. We observe a 70-fold difference between the average fluorescence
lifetimes and a 90-fold increase in the average detected saturated
intensity. The nanocavity-coupled NVs produce up to 35 million photon
counts per second, several times more than the previously reported
rates from room-temperature quantum emitters