235 citations · 444 across the 15 of their papers we have counts for
15 papers
Mid-infrared Single-photon Detection Using Superconducting NbTiN Nanowires with Sub-15 ps Time Resolution in a Gifford-McMahon Cryocooler
Jin Chang, Johannes W. N. Los, Ronan Gourgues +6
Shortly after their inception, superconducting nanowire single-photon detectors (SNSPDs) became the leading quantum light detection technology. With the capability of detecting sin…
High Finesse Cavity with Anapole-Assisted Resonant Subwavelength Particle Mirror
Z. Xi, H. P. Urbach
Strong light interaction with a subwavelength object has been a long pursuing goal with difficulties mainly arising from the diffraction limit. We propose a high finesse cavity wit…
Detecting Infrared Single Photons with Near-Unity System Detection Efficiency
Jin Chang, Johannes W. N. Los, Jaime Oscar Tenorio-Pearl +9
Single photon detectors are indispensable tools in optics, from fundamental measurements to quantum information processing. The ability of superconducting nanowire single photon de…
Parameter retrieval methods in ptychography
Xukang Wei, H. Paul Urbach, Peter van der Walle +1
We present a parameter retrieval method which combines ptychography and additional prior knowledge about the object. The proposed method is applied to two applications: (1) paramet…
The CRLB and Maximum likelihood in ptychography with Poisson noise
Xukang Wei, H. Paul Urbach
We investigate the performance of ptychography with noisy data by analyzing the Cramér Rao Lower Bound. The lower bound of ptychography is derived and numerically computed for both…
Fisher-Information Efficient Metagratings for Transverse Displacement Metrology at the Measurement Independent Shot-Noise Limit
Zheng Xi, Sander Konijnenberg, H. P. Urbach
We derive the measurement independent precision bound for transverse displacement metrology using a classical source. Using tools from quantum estimation theory and metamaterial de…
On-chip interrogator based on Fourier Transform spectroscopy
Fellipe Grillo Peternella, Thomas Esselink, Bas Dorsman +5
In this paper, the design and the characterization of a novel interrogator based on integrated Fourier transform (FT) spectroscopy is presented. To the best of our knowledge, this…
Lateral position correction in ptychography with sub-pixel accuracy
P. Dwivedi, A. P. Konijnenberg, S. F. Pereira +1
Ptychography, a form of Coherent Diffractive Imaging, is used with short wavelengths (e.g. X-rays, electron beams) to achieve high-resolution image reconstructions. One of the limi…
Study of cost functionals for ptychographic phase retrieval to improve the robustness against noise, and a proposal for another noise-robust ptychographic phase retrieval scheme
A. P. Konijnenberg, W. M. J. Coene, H. P. Urbach
Recently, efforts have been made to improve ptychography phase retrieval algorithms so that they are more robust against noise. Often the algorithm is adapted by changing the cost…
Spatial Mode Selective Waveguide with Hyperbolic Cladding
Y. Tang, Z. Xi, M. Xu +3
Hyperbolic Meta-Materials~(HMMs) are anisotropic materials with permittivity tensor that has both positive and negative eigenvalues. Here we report that by using a type II HMM as c…
Extended object reconstruction from image intensities blurred by unknown aberrations
Yifeng Shao, Niek Doelman, Silvania F. Pereira +1
We describe and experimentally validate an algorithm to reconstruct an unknown extended object from through-focus measured image intensities blurred by unknown aberrations. It is s…
Broadband active tuning of unidirectional scattering from nanoantenna using combined radially and azimuthally polarized beams
Zheng Xi, Lei Wei, A. J. L. Adam +1
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 electric dipole and induced…
Optimized 3D simulation method for modeling of out-of-plane radiation in silicon photonic integrated circuits
W. J. Westerveld, H. P. Urbach, M. Yousefi
We present an accurate and fast 3D simulation scheme for out-of-plane grating couplers, based on two dimensional rigorous (finite difference time domain) grating simulations, the e…
Image formation properties and inverse imaging problem in aperture based scanning near field optical microscopy
S. Schmidt, A. E. Klein, T. Paul +7
Aperture based scanning near field optical microscopes are important instruments to study light at the nanoscale and to understand the optical functionality of photonic nanostructu…
Electromagnetic Spin-Orbit Interactions via Scattering
L. T. Vuong, A. J. L. Adam, J. M. Brok +4
The longitudinal components of orthogonal-circularly polarized fields carry a phase singularity that changes sign depending on the polarization handedness. The addition of orbital…