5,693 research outputs found
Diamond photonics platform enabled by femtosecond laser writing
We demonstrate the first buried optical waveguides in diamond using focused
femtosecond laser pulses. The properties of nitrogen vacancy centers are
preserved in the waveguides, making them promising for diamond-based
magnetometers or quantum information systems.Comment: 24 pages, 6 figure
Nanoscale Sensing Using Point Defects in Single-Crystal Diamond: Recent Progress on Nitrogen Vacancy Center-Based Sensors
Individual, luminescent point defects in solids so called color centers are
atomic-sized quantum systems enabling sensing and imaging with nanoscale
spatial resolution. In this overview, we introduce nanoscale sensing based on
individual nitrogen vacancy (NV) centers in diamond. We discuss two central
challenges of the field: First, the creation of highly-coherent, shallow NV
centers less than 10 nm below the surface of single-crystal diamond. Second,
the fabrication of tip-like photonic nanostructures that enable efficient
fluorescence collection and can be used for scanning probe imaging based on
color centers with nanoscale resolution.Comment: Overview paper on sensing with defects in diamond, we focus on
creation of shallow NV centers and nanostructures, Final Version published in
Crystal
Classical and fluctuation-induced electromagnetic interactions in micronscale systems: designer bonding, antibonding, and Casimir forces
Whether intentionally introduced to exert control over particles and
macroscopic objects, such as for trapping or cooling, or whether arising from
the quantum and thermal fluctuations of charges in otherwise neutral bodies,
leading to unwanted stiction between nearby mechanical parts, electromagnetic
interactions play a fundamental role in many naturally occurring processes and
technologies. In this review, we survey recent progress in the understanding
and experimental observation of optomechanical and quantum-fluctuation forces.
Although both of these effects arise from exchange of electromagnetic momentum,
their dramatically different origins, involving either real or virtual photons,
lead to different physical manifestations and design principles. Specifically,
we describe recent predictions and measurements of attractive and repulsive
optomechanical forces, based on the bonding and antibonding interactions of
evanescent waves, as well as predictions of modified and even repulsive Casimir
forces between nanostructured bodies. Finally, we discuss the potential impact
and interplay of these forces in emerging experimental regimes of
micromechanical devices.Comment: Review to appear on the topical issue "Quantum and Hybrid Mechanical
Systems" in Annalen der Physi
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