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Institution

The Institute of Optics

About: The Institute of Optics is a based out in . It is known for research contribution in the topics: Laser & Wavefront. The organization has 2805 authors who have published 3656 publications receiving 96233 citations.


Papers
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Journal ArticleDOI
TL;DR: The first experimental investigation of nondiffracting beams, with beam spots as small as a few wavelengths, can exist and propagate in free space, is reported.
Abstract: It was recently predicted that nondiffracting beams, with beam spots as small as a few wavelengths, can exist and propagate in free space. We report the first experimental investigation of these beams.

2,919 citations

Journal ArticleDOI
TL;DR: By varying the distance between molecule and particle, this work shows the first experimental measurement demonstrating the continuous transition from fluorescence enhancement to fluorescence quenching.
Abstract: We present an experimental and theoretical study of the fluorescence rate of a single molecule as a function of its distance to a laser-irradiated gold nanoparticle. The local field enhancement leads to an increased excitation rate whereas nonradiative energy transfer to the particle leads to a decrease of the quantum yield (quenching). Because of these competing effects, previous experiments showed either fluorescence enhancement or fluorescence quenching. By varying the distance between molecule and particle we show the first experimental measurement demonstrating the continuous transition from fluorescence enhancement to fluorescence quenching. This transition cannot be explained by treating the particle as a polarizable sphere in the dipole approximation.

2,854 citations

Journal ArticleDOI
TL;DR: In this paper, exact nonsingular solutions of the scalar-wave equation for beams that are non-diffracting were presented, which means that the intensity pattern in a transverse plane is unaltered by propagating in free space.
Abstract: We present exact, nonsingular solutions of the scalar-wave equation for beams that are nondiffracting. This means that the intensity pattern in a transverse plane is unaltered by propagating in free space. These beams can have extremely narrow intensity profiles with effective widths as small as several wavelengths and yet possess an infinite depth of field. We further show (by using numerical simulations based on scalar diffraction theory) that physically realizable finite-aperture approximations to the exact solutions can also possess an extremely large depth of field.

2,283 citations

Journal ArticleDOI
TL;DR: Three new algorithms for 2D translation image registration to within a small fraction of a pixel that use nonlinear optimization and matrix-multiply discrete Fourier transforms are compared to evaluate a translation-invariant error metric.
Abstract: Three new algorithms for 2D translation image registration to within a small fraction of a pixel that use nonlinear optimization and matrix-multiply discrete Fourier transforms are compared. These algorithms can achieve registration with an accuracy equivalent to that of the conventional fast Fourier transform upsampling approach in a small fraction of the computation time and with greatly reduced memory requirements. Their accuracy and computation time are compared for the purpose of evaluating a translation-invariant error metric.

1,715 citations

Journal ArticleDOI
TL;DR: It is shown that, in the particular case of a tightly focused, radially polarized beam, the polarization shows large inhomogeneities in the focal region, while the azimuthally polarized beam is purely transverse even at very high numerical apertures.
Abstract: Cylindrical-vector beams are of increasing recent interest for their role in novel laser resonators and their applications to electron acceleration and scanning microscopy. In this paper, we calculate cylindrical-vector fields, near the focal region of an aplanatic lens, and briefly discuss some applications. We show that, in the particular case of a tightly focused, radially polarized beam, the polarization shows large inhomogeneities in the focal region, while the azimuthally polarized beam is purely transverse even at very high numerical apertures.

1,472 citations


Authors

Showing all 2805 results

NameH-indexPapersCitations
David R. Williams1782034138789
Robert W. Boyd98116137321
Hao Wang89159943904
Alexander L. Gaeta8666729838
Emil Wolf8450681808
Ian A. Walmsley8459323962
John E. Sipe8371927000
Shuai Wang8267027554
Lukas Novotny8143537490
Xi-Cheng Zhang7950225442
Oleg V. Prezhdo7848220186
Nail Akhmediev7646924205
Govind P. Agrawal7572949297
F. Javier García de Abajo7535130221
Xiong Li7149321914
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20222
2021132
2020183
2019236
2018124
2017136