Search Results - "Urbach, H. P."

Magnetic Dipole Scattering from Metallic Nanowire for Ultrasensitive Deflection Sensing by Xi, Zheng, Urbach, H P

“…It is generally believed that when a single metallic nanowire is sufficiently small, it scatters like a point electric dipole. We show theoretically when a…”
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Radially polarized light for detection and nanolocalization of dielectric particles on a planar substrate by Roy, S, Ushakova, K, van den Berg, Q, Pereira, S F, Urbach, H P

“…A fast noninvasive method based on scattering from a focused radially polarized light to detect and localize subwavelength nanoparticles on a substrate is…”
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Retrieving the Size of Deep-Subwavelength Objects via Tunable Optical Spin-Orbit Coupling by Xi, Zheng, Urbach, H P

“…We propose a scheme to retrieve the size parameters of a nanoparticle on a glass substrate at a scale much smaller than the wavelength. This is achieved by…”
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Accurate Feeding of Nanoantenna by Singular Optics for Nanoscale Translational and Rotational Displacement Sensing by Xi, Zheng, Wei, Lei, Adam, A J L, Urbach, H P, Du, Luping

“…Identifying subwavelength objects and displacements is of crucial importance in optical nanometrology. We show in this Letter that nanoantennas with…”
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El Gawhary, Van Mechelen, and Urbach Reply by El Gawhary, Omar, Van Mechelen, Todd, Urbach, H. P.

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Role of Radial Charges on the Angular Momentum of Electromagnetic Fields: Spin-3/2 Light by Gawhary, O El, Van Mechelen, T, Urbach, H P

“…Electromagnetic fields carry a linear and an angular momentum, the first being responsible for the existence of the radiation pressure and the second for the…”
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Creation of an anti-imaging system using binary optics by Wang, Haifeng, Lin, Jian, Zhang, Dawei, Wang, Yang, Gu, Min, Urbach, H. P., Gan, Fuxi, Zhuang, Songlin

“…We present a concealing method in which an anti-point spread function (APSF) is generated using binary optics, which produces a large-scale dark area in the…”
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Angular momentum properties of hybrid cylindrical vector vortex beams in tightly focused optical systems by Meng, Peiwen, Man, Zhongsheng, Konijnenberg, A P, Urbach, H P

“…Optical angular momenta (AM) have attracted tremendous research interest in recent years. In this paper we theoretically investigate the electromagnetic field…”
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Giant optical transmission of a subwavelength slit optimized using the magnetic field phase by Janssen, O T A, Urbach, H P, 't Hooft, G W

“…In this Letter, we show that the energy equivalent to that incident on a 4.7 microm wide strip can be squeezed through a 50 nm wide slit in a metal film…”
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Effects of whispering gallery mode in microsphere super-resolution imaging by Zhou, Song, Deng, Yongbo, Zhou, Wenchao, Yu, Muxin, Urbach, H. P., Wu, Yihui

“…Whispering Gallery modes have been presented in microscopic glass spheres or toruses with many applications. In this paper, the possible approaches to enhance…”
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Wire-grid diffraction gratings used as polarizing beam splitter for visible light and applied in liquid crystal on silicon by Xu, M, Urbach, H, de Boer, D, Cornelissen, H

“…The application of wire grid polarizers as efficient polarizing beam splitters for visible light is studied. The large differences between the transmissivity…”
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Superresolution effect due to a thin dielectric slab for imaging with radially polarized light by Meng, Peiwen, Pereira, S. F., Dou, Xiujie, Urbach, H. P.

“…Improving the image quality of small particles is a classic problem and especially challenging when the distance between particles are below the optical…”
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Detecting telecom single photons with 99.5−2.07+0.5% system detection efficiency and high time resolution by Chang, J., Los, J. W. N., Tenorio-Pearl, J. O., Noordzij, N., Gourgues, R., Guardiani, A., Zichi, J. R., Pereira, S. F., Urbach, H. P., Zwiller, V., Dorenbos, S. N., Esmaeil Zadeh, I.

“…Single photon detectors are indispensable tools in optics, from fundamental measurements to quantum information processing. The ability of superconducting…”
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Submicron hollow spot generation by solid immersion lens and structured illumination by Kim, M-S, Assafrao, A C, Scharf, T, Wachters, A J H, Pereira, S F, Urbach, H P, Brun, M, Olivier, S, Nicoletti, S, Herzig, H P

“…We report on the experimental and numerical demonstration of immersed submicron-size hollow focused spots, generated by structuring the polarization state of…”
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Lateral position correction in ptychography using the gradient of intensity patterns by Dwivedi, Priya, Konijnenberg, A.P., Pereira, S.F., Urbach, H.P.

“…•New method to correct the probe position in ptychography is proposed.•This method can correct the probe position with sub-pixel accuracy.•Less computationally…”
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Extraordinary transmission through 1, 2 and 3 holes in a perfect conductor, modelled by a mode expansion technique by Brok, J M, Urbach, H P

“…We discuss a mode expansion technique to rigorously model the diffraction from three-dimensional pits and holes in a perfectly conducting layer with finite…”
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Long distance measurement with femtosecond pulses using a dispersive interferometer by Cui, M, Zeitouny, M G, Bhattacharya, N, van den Berg, S A, Urbach, H P

“…We experimentally demonstrate long distance measurements with a femtosecond frequency comb laser using dispersive interferometry. The distance is derived from…”
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Model-independent noise-robust extension of ptychography by Konijnenberg, A P, Coene, W M J, Urbach, H P

“…A noise-robust extension of iterative phase retrieval algorithms that does not need to assume a noise model is proposed. It works by adapting the intensity…”
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Scanning effects in coherent fourier scatterometry by Roy, S., El Gawhary, O., Kumar, N., Pereira, S. F., Urbach, H. P.

“…Incoherent Fourier Scatterometry (IFS) is a successful tool for high accuracy nano-metrology. As this method uses only far field measurements, it is very…”
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Broadband active tuning of unidirectional scattering from nanoantenna using combined radially and azimuthally polarized beams by Xi, Z, Wei, L, Adam, A J L, Urbach, H P

“…We propose an approach to actively tune the scattering pattern of a Mie-type spherical antenna. The scheme is based on separate control over the induced…”
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