Results 11 to 20 of about 515,526 (309)

Large optical field enhancement for nanotips with large opening angles

New Journal of Physics, 2015
We theoretically investigate the dependence of the enhancement of optical near-fields at nanometric tips on the shape, size, and material of the tip. We confirm the strong dependence of the field enhancement factor on the radius of curvature. In addition,
Sebastian Thomas, Georg Wachter, Christoph Lemell, Joachim Burgdörfer, Peter Hommelhoff   +4 more
doaj   +2 more sources

Bowtie Nanoantenna Array Integrated With Artificial Impedance Surfaces for Realizing High Field Enhancement and Perfect Absorption Simultaneously

IEEE Access, 2020
High field enhancement and near-perfect absorption in nanoantennas were realized by using in-plane (between nanoantenna arms), out-of-plane (between nanoantenna and reflector), and array coupling (between nanoantennas in an array); however, it was ...
Mohamad Khoirul Anam, Sangjo Choi
doaj   +1 more source

Hybrid Metal-Dielectric-Metal Sandwiches for SERS Applications

Nanomaterials, 2021
The development of efficient plasmonic nanostructures with controlled and reproducible surface-enhanced Raman spectroscopy (SERS) signals is an important task for the evolution of ultrasensitive sensor-related methods. One of the methods to improving the
Mikhail K. Tatmyshevskiy, Dmitry I. Yakubovsky, Olesya O. Kapitanova, Valentin R. Solovey, Andrey A. Vyshnevyy, Georgy A. Ermolaev, Yuri A. Klishin, Mikhail S. Mironov, Artem A. Voronov, Aleksey V. Arsenin, Valentyn S. Volkov, Sergey M. Novikov   +11 more
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Parabola-Like Gold Nanobowtie on Sapphire Substrate as Nano-Cavity

Photonics, 2022
Plasmonic metallic nanostructures have attracted much interest for their ability to manipulate light on a subwavelength scale and for their related applications in various fields.
Wenbing Li, Zhuo Yang, Jiali Zhang, Xin Tong, Yuheng Zhang, Bo Liu, Chao Ping Chen   +6 more
doaj   +1 more source

Local field enhancement of nano-structured metallic target irradiated by polarized laser beam [PDF]

Journal of the European Optical Society-Rapid Publications, 2012
The local field enhancement is studied numerically in samples of metallic nanoparticles (NPs) randomly distributed over a metallic substrate. The sample was assumed to be irradiated by polarized laser beam. Based on dipole-dipole approximation (DDA), the
Nikbakht M., Mahdieh M. H.
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Applications of field-enhanced near-field optical microscopy [PDF]

Ultramicroscopy, 2004
Metal nanostructures such as sharp tips can enhance emission yields through shape-induced local field enhancement. The enhancement originates from two mechanisms: surface plasmons and electrostatic lightening rod effects. We present fluorescence imaging using the strong local field created at the apex of a gold tip and demonstrate optical resolution of
A, Bouhelier, M R, Beversluis, L, Novotny   +2 more
openaire   +2 more sources

Regeneration enhancers: a field in development

American Journal of Physiology-Cell Physiology, 2022
The ability to regenerate tissues and organs following damage is not equally distributed across metazoans, and even highly related species can vary considerably in their regenerative capacity. Studies of animals with high regenerative potential have shown that factors expressed during normal development are often reactivated upon damage and required ...
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Distributing the Optical Near‐Field for Efficient Field‐Enhancements in Nanostructures [PDF]

Advanced Materials, 2012
We are grateful to Saloomeh Shariati from the crypto group in the Universite Catholique de Louvain, for helpful discussion on the measures of the uniformity in images. We acknowledge financial support from the fund for scientific research Flanders (FWO-V), the K. U.
Valev, V, De Clercq, B, Biris, C, Zheng, X, Vandendriessche, S, Hojeij, M, Denkova, D, Jeyaram, Y, Panoiu, N, Ekinci, Y, Silhanek, Alejandro, Volskiy, V, Vandenbosch, G, Ameloot, M, Moshchalkov, V, Verbiest, T   +15 more
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Beyond-hot-spot absorption enhancement on top of terahertz nanotrenches

Nanophotonics, 2022
Metallic nanogaps are being widely used for sensing applications, owing to their ability to confine and enhance electromagnetic field within the hot spots.
Jeong Jeeyoon, Kim Dai-Sik, Park Hyeong-Ryeol   +2 more
doaj   +1 more source

Field enhancement properties of nanotubes in a field emission set-up [PDF]

IVMC 2001. Proceedings of the 14th International Vacuum Microelectronics Conference (Cat. No.01TH8586), 2002
The polarization phenomenon, involved in the mechanisms of emission from carbon nanotubes, is investigated by means of a self-consistent resolution of Poisson's equation. We show that the field enhancement. responsible for the emission, varies in a logarithmic way with the nanotube length.
Ch. Adessi, M. Devel
openaire   +1 more source