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van den Berg, S. (author), Dekker, P. (author), Otter, G.C.J. (author), Pelica Páscoa, M.I. (author), Dijkhuizen, N. (author)
We have developed an SI-traceable narrow-band tunable radiance source based on an optical parametric oscillator (OPO) and an integrating sphere for the calibration of spectroradiometers. The source is calibrated with a reference detector over the ultraviolet/visible spectral range with an uncertainty of < 1%. As a case study, a CubeSat spectro...
article 2021
document
Caron, J.F. (author), Bäumer, S.M.B. (author)
The aberrations of reflective optical systems with one plane of symmetry are investigated in the most general case, with freeform surfaces and possibly different locations of the tangential and sagittal object and image. In this first paper in a series of two, we establish generalized ray-tracing equations including transverse aberrations up to...
article 2021
document
Caron, J.F. (author), Bäumer, S.M.B. (author)
The aberrations of reflective optical systems with planar symmetry are investigated in the most general case, with freeform surfaces and possibly different locations of the tangential and sagittal object and image. In this second and last paper, closed-form expressions are derived for the aberrations created by an individual mirror. We study two...
article 2021
document
Buijs, R.D. (author), Wolterink, T.A.W. (author), Gerini, G. (author), Koenderink, A.F. (author), Verhagen, E. (author)
Nanophotonic structures are powerful tools for sensing, with the goal of retrieving parameters accurately at maximum speed and minimum photon budget. As information on those parameters can be distributed over multiple output scattering channels that propagate to the far field, considering well-chosen combinations of far-field optical degrees of...
article 2021
document
Nagarajan, A. (author), van Erve, K. (author), Gerini, G. (author)
A coupled dielectric-metal metasurface (CDMM) filter consisting of amorphous silicon (a-Si) rings and subwavelength holes in Au layer separated by a SiO2 layer is presented. The design parameters of the CDMM filter is numerically optimized to have a polarization independent peak transmittance of 0.55 at 1540 nm with a FullWidth at Half Maximum ...
article 2020
document
Stoevelaar, L.P. (author), Berzins, J. (author), Silvestri, F. (author), Fasold, S. (author), Zangeneh Kamali, K. (author), Knopf, H. (author), Eilenberger, F. (author), Setzpfandt, F. (author), Pertsch, T. (author), Bäumer, S.M.B. (author), Gerini, G. (author)
We present a planar spectro-polarimeter based on Fabry-Pérot cavities with embedded polarization-sensitive high-index nanostructures. A 7 μm-thick spectro-polarimetric system for 3 spectral bands and 2 linear polarization states is experimentally demonstrated. Furthermore, an optimal design is theoretically proposed, estimating that a system...
article 2020
document
Berzins, J. (author), Indrisiūnas, S. (author), Fasold, S. (author), Steinert, M. (author), Zukovskaja, O. (author), Cialla-May, D. (author), Gecys, P. (author), Bäumer, S.M.B. (author), Pertsch, T. (author), Setzpfandt, F. (author)
Optically resonant high-index dielectric metasurfaces featuring Mie-type electric and magnetic resonances are usually fabricated by means of planar technologies, which limit the degrees of freedom in tunability and scalability of the fabricated systems. Therefore, we propose a complimentary post-processing technique based on ultrashort (≤ 10 ps)...
article 2020
document
van Kooten, M. (author), Doelman, N.J. (author), Kenworthy, M. (author)
For high-contrast imaging systems, the time delay is one of the major limiting factors for the performance of the extreme adaptive optics (AO) sub-system and, in turn, the final contrast. The time delay is due to the finite time needed to measure the incoming disturbance and then apply the correction. By predicting the behavior of the...
article 2019
document
Zheng, G. (author), Samkharadze, N. (author), Noordam, M.L. (author), Kalhor, N. (author), Brousse, D. (author), Sammak, A. (author), Mendes, U.C. (author), Blais, A. (author), Scappucci, G. (author), Vandersypen, L.M.K. (author)
We demonstrate the strong coupling between a single electron spin in silicon and a single photon in a superconducting microwave cavity. Using the same cavity we perform rapid high-fidelity single-shot readout of two-electron spin states.
conference paper 2019
document
Hermans, S. (author), Tchebotareva, A. (author), Humphreys, P. (author), Voigt, D. (author), Harmsma, P. (author), Cheng, L. (author), Verlaan, A. (author), Dijkhuizen, N. (author), de Jong, W. (author), Dréau, A. (author), Hanson, R. (author)
We experimentally demonstrate the preservation of entanglement between an NV spin and a photon upon quantum frequency conversion to the Telecom band. This is a crucial step in realizing long-distance quantum networks.
conference paper 2019
document
Peternella, F.G. (author), Esselink, T. (author), Dorsman, B. (author), Harmsma, P.J. (author), Horsten, R.C. (author), Zuidwijk, T. (author), Urbach, H.P. (author), Adam, A.L.C. (author)
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 is the first integrated FT spectrometer used for the interrogation of photonic sensors. It consists of a planar spatial heterodyne spectrometer, which is implemented...
article 2019
document
Rezaei, N. (author), Isabella, O. (author), Procel, P. (author), Vroon, Z.A.E.P. (author), Zeman, M. (author)
A novel back-contacted solar cell based on a submicron copper indium gallium (di)selenide (CIGS) absorber is proposed and optically investigated. First, charge carrier collection feasibility is studied by band diagram analysis. Then, two back-contacted configurations are suggested and optimized for maximum current production. The results are...
article 2019
document
Nagarajan, A. (author), Stoevelaar, L.P. (author), Silvestri, F. (author), Siemons, M. (author), Achanta, V.G. (author), Bäumer, S.M.B. (author), Gerini, G. (author)
A superoscillatory lens (SOL) is known to produce a sub-diffraction hotspot that is useful for high-resolution imaging. SOLs have not yet been directly used in a confocal reflection setup, as the SOL suffers from poor imaging properties. Additionally, the illuminating intensity distribution of the SOL still has high-intensity rings called...
article 2019
document
Lesundak, A. (author), Voigt, D. (author), Cip, O. (author), van den Berg, S. (author)
Homodyne interferometry with a frequency comb as multi-wavelength source is a powerful method to measure long distances with high accuracy. The measurement principle requires that individual comb modes are spectrally resolved, making hundreds or thousands of accurately known wavelengths available for interferometry. For this reason the method...
article 2017
document
Heo, J. (author), Xu, M. (author), Maas, D.J. (author)
Due to the rather broad band emission spectrum of the extremely hot plasma in its extreme ultra-violet (EUV) source, an EUV lithography scanner also projects out-of-band vacuum- and deep-UV (OoB V/DUV) light on the photoresist on a wafer. As this type of uncontrolled and undesirable light can activate resist chemistry, it will impair the...
article 2017
document
Silvestri, F. (author), Gerini, G. (author), Bäumer, S.M.B. (author), van Zwet, E.J. (author)
In this paper, we present a design strategy for single layer metasurface lenses based on dielectric resonators. This strategy is based on a robust optimization procedure for the resonator distribution in order to meet required performances (e.g. encircled energy, bandwidth, field of view, etc.). Possible deviations due to manufacturing errors are...
article 2016
document
Tang, Y. (author), Xi, Z. (author), Xu, M. (author), Bäumer, S.M.B. (author), Adam, A.J.L. (author), Urbach, H.P. (author)
Hyperbolic metamaterials (HMMs) are anisotropic materials with a permittivity tensor that has both positive and negative eigenvalues. Here we report that by using a type II HMM as a cladding material, a waveguide that only supports higher-order modes can be achieved, while the lower-order modes become leaky and are absorbed in the HMM cladding....
article 2016
document
van Wingerden, J. (author), Frankena, H.J. (author), Smorenburg, C. (author), Technisch Physische Dienst TNO - TH (author)
This paper shows how measurement errors in phase shifting interferometry (PSI) can be described to a high degree of accuracy in a linear approximation. System error sources considered here are light source instability, imperfect reference phase shifting, mechanical vibrations, nonlinearity of the detector, and quantization of the detector signal...
article 1991
document
Frietman, E.E.E. (author), van Nifterick, W. (author), Dekkel, L. (author), Jongeling, T.J.M. (author), Technisch Physische Dienst TNO - TH (author)
Performance and efficiency of multiple processor computers depend strongly on the network that interconnects the distinct coilaborating processors. Constrained connectivity forces much of the potential computing speed to be used to compensate for the limitation in connections. The availability of a multiple parallel 1/0 connections allows full...
article 1990
document
Prangé, R. (author), Duban, M. (author), Vidal-Madjar, A. (author), Barnstedt, J. (author), Parisot, D. (author), Decaudin, M. (author), Crussaire, J.P. (author), Laurent, C. (author), Labèque, A. (author), Ancourt, G. (author), Flamand, J. (author), Grewing, M. (author), Hoekstra, R. (author), Thévenon, A. (author), Bargot, G. (author), Barthélémy, M. (author), Canovas, F. (author), Charra, C. (author), Hallier, C. (author), Lagardère, H. (author), Levanti, G. (author), Michaud, G. (author), Poncet, H. (author), Technisch Physische Dienst TNO - TH (author)
We have performed theoretical determination and experimental calibrations ofan objective grating designed for high resolution spectroscopy of astronomical faint sources in the EUV and far-UV wavelength ranges (500-1400 Á). First through theoretical calculations we show the feasibility of the concept with an aspheric shape for the grating blank...
article 1989
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