6,579 research outputs found
Plasmonic Optical Tweezers based on Nanostructures: fundamentals, advances and prospects
The ability of metallic nanostructures to confine light at the sub-wavelength
scale enables new perspectives and opportunities in the field of
nanotechnology. Making use of this unique advantage, nano-optical trapping
techniques have been developed to tackle new challenges in a wide range of
areas from biology to quantum optics. In this work, starting from basic
theories, we present a review of research progress in near-field optical
manipulation techniques based on metallic nanostructures, with an emphasis on
some of the most promising advances in molecular technology, such as the
precise control of single-biomolecules. We also provide an overview of possible
future research directions of nano-manipulation techniques.Comment: 19 page
Nonlocal optical response in metallic nanostructures
This review provides a broad overview of the studies and effects of nonlocal
response in metallic nanostructures. In particular, we thoroughly present the
nonlocal hydrodynamic model and the recently introduced generalized nonlocal
optical response (GNOR) model. The influence of nonlocal response on plasmonic
excitations is studied in key metallic geometries, such as spheres and dimers,
and we derive new consequences due to the GNOR model. Finally, we propose
several trajectories for future work on nonlocal response, including
experimental setups that may unveil further effects of nonlocal response
Dual polarization operation of nanostructure arrays in the MIR region
In this paper, we report on arrays of asymmetric split H-shape nanostructures tuned to produce two distinct resonances at wavelengths that range from 3 μm to 7 μm. The electric-field of the incident wave has been both polarized parallel to the vertical asymmetric dipole arms and polarized across the 50 nm gap in the asymmetric horizontal bar. We have produced resonance quality factors as large as 26 in the mid-infrared region
Coherent Amplification of Optical Pulses in Metamaterials
In this paper we theoretically study propagation of steady state ultrashort
pulse in dissipative medium. We considered two cases (i) medium consists of
lossy metallic nanostructures embedded into a gain material and (ii) the gain
material is embedded directly into the nanostructures. We found the shape and
velocity of an optical pulse coupled with the polarization wave.Comment: 9 pages, 5 figures, submitted to IEEE Tran
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