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Kosters, N.D. (author), De Hoogh, Anouk (author), Zeijlemaker, Hans (author), Acar, Hakkl (author), Rotenberg, Nir (author), Kuipers, L. (author)We introduce core-shell plasmonic nanohelices, highly tunable structures that have a different response in the visible for circularly polarized light of opposite handedness. The glass core of the helices is fabricated using electron beam induced deposition and the pure gold shell is subsequently sputter coated. Optical measurements allow us...journal article 2017
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Bos, Boy Gustaaf Cornelis (author), Thoen, David (author), Haalebos, E. A.F. (author), Gimbel, P. M.L. (author), Klapwijk, T.M. (author), Baselmans, J.J.A. (author), Endo, A. (author)The superconducting critical temperature (T-\mathrm{c} > 15 K) of niobium titanium nitride (NbTiN) thin films allows for low-loss circuits up to 1.1 THz, enabling on-chip spectroscopy and multipixel imaging with advanced detectors. The drive for large-scale detector microchips is demanding NbTiN films with uniform properties over an...journal article 2017
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Parappurath, N. (author), Alpeggiani, F. (author), Kuipers, L. (author), Verhagen, Ewold (author)We observe that the asymmetric transmission (AT) through photonic systems with a resonant chiral response is strongly related to the far-field properties of eigenmodes of the system. This understanding can be used to predict the AT for any resonant system from its complex eigenmodes. We find that the resonant chiral phenomenon of AT is...journal article 2017
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Girovský, J. (author), Lado, José L. (author), Kalff, F.E. (author), Fahrenfort, E. (author), Peters, Lucas J.J.M. (author), Fernández-Rossier, Joaquín (author), Otte, A. F. (author)The interaction of electrons with a periodic potential of atoms in crystalline solids gives rise to band structure. The band structure of existing materials can be measured by photoemission spectroscopy and accurately understood in terms of the tight-binding model, however not many experimental approaches exist that allow to tailor artificial...journal article 2017
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Yurduseven, O. (author), Bosma, S. (author), Endo, A. (author), Neto, A. (author), Llombart, Nuria (author)DESHIMA (Deep Spectroscopic High-redshift Mapper) is an instrument aiming at efficiently making spectroscopic redshift measurements of sub-mm wave galaxies (SMGs), thereby providing about the formation and the evolution of stars and galaxies. The aim of this work is to provide a preliminary study into the design of a wideband leaky lens antenna...conference paper 2017
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- Houri, S. (author), Cartamil Bueno, S.J. (author), Poot, M. (author), Steeneken, P.G. (author), van der Zant, H.S.J. (author), Venstra, W.J. (author) journal article 2017
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de Angelis, L. (author), Alpeggiani, F. (author), Di Falco, Andrea (author), Kuipers, L. (author)Phase singularities can be created and annihilated, but always in pairs. With optical near-field measurements, we track singularities in random waves as a function of wavelength, and discover correlations between creation and annihilation events.conference paper 2017
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Alpeggiani, F. (author), Parappurath, N. (author), Verhagen, E. (author), Kuipers, L. (author)It is well known that the quasinormal modes (or resonant states) of photonic structures can be associated with the poles of the scattering matrix of the system in the complex-frequency plane. In this work, the inverse problem, i.e., the reconstruction of the scattering matrix from the knowledge of the quasinormal modes, is addressed. We develop...journal article 2017
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Parappurath, N. (author), Alpeggiani, F. (author), Kuipers, L. (author), Verhagen, E. (author)We develop a theoretical formalism which explains asymmetric transmission (AT) in chiral resonators from their eigenmodes. We derive a fundamental limit for AT and propose the design of a chiral photonic crystal offering 84% AT.conference paper 2017
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Baselmans, J.J.A. (author), Bueno, J. (author), Yates, S.J.C. (author), Yurduseven, O. (author), Llombart, Nuria (author), Karatsu, K. (author), Baryshev, A.M. (author), Ferrarini, L (author), Endo, A. (author), Thoen, David (author), de Visser, P.J. (author), Janssen, R.M.J. (author), Murugesan, V. (author), Driessen, E.F.C. (author), Coiffard, G. (author), Martin-Pintado, J. (author), Hargrave, P. (author), Griffin, M. (author)Aims. Future astrophysics and cosmic microwave background space missions operating in the far-infrared to millimetre part of the spectrum will require very large arrays of ultra-sensitive detectors in combination with high multiplexing factors and efficient low-noise and low-power readout systems. We have developed a demonstrator system suitable...journal article 2017
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de Angelis, L. (author), Alpeggiani, F. (author), Di Falco, Andrea (author), Kuipers, L. (author)Phase singularities arise in scalar random waves, with spatial distribution reminiscent of particles in liquids. Supporting near-field experiment with analytical theory we show how such spatial distribution changes when considering vector waves.conference paper 2016
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Esmaeil Zadeh, I.Z. (author)In the past decades quantum optics has been at the forefront of quantum innovative technologies. For practical applications, scalable platforms for implementation of quantum optical circuits are vital. This thesis presents two new platforms for scalable implementation of quantum optical circuits, namely, modular approach and monolithic...doctoral thesis 2016
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Wagenaar, J.J.T. (author), Den Haan, A.M.J. (author), de Voogd, J.M. (author), Bossoni, L. (author), de Jong, T.A. (author), de Wit, M. (author), Bastiaans, K.M. (author), Thoen, David (author), Endo, A. (author), Klapwijk, T.M. (author), Zaanen, J. (author), Oosterkamp, TH (author)Nuclear spin-lattice relaxation times are measured on copper using magnetic-resonance force microscopy performed at temperatures down to 42 mK. The low temperature is verified by comparison with the Korringa relation. Measuring spin-lattice relaxation times locally at very low temperatures opens up the possibility to measure the magnetic...journal article 2016
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Perrin, M.L. (author), Galán García, E. (author), Eelkema, R. (author), Thijssen, J.M. (author), Grozema, F.C. (author), van der Zant, H.S.J. (author)In the pursuit of down-sizing electronic components, the ultimate limit is the use of single molecules as functional devices. The first theoretical proposal of such a device, predicted more than four decades ago, is the seminal Aviram–Ratner rectifier that exploits the orbital structure of the molecule. The experimental realization of single...journal article 2016
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Vuik, A. (author), Eeltink, D. (author), Akhmerov, A.R. (author), Wimmer, M.T. (author)One of the promising platforms for creating Majorana bound states is a hybrid nanostructure consisting of a semiconducting nanowire covered by a superconductor.Weanalyze the previously disregarded role of electrostatic interaction in these devices. Our main result is that Coulomb interaction causes the chemical potential to respond to an applied...journal article 2016
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Zuo, K. (author), Mourik, V. (author)Majorana fermions are exotic elementary particles predicted in 1937 by Ettore Majorana. Although heavily searched for, they have never been found in nature up to date. In the past decades, with the progress in theory, theoretical physicists predicted that Majorana fermions might emerge in certain exotic classes of condensed matter systems, where...doctoral thesis 2016
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Beukman, A.J.A. (author)This thesis includes two research directions both aim to discover a building block for topological quantum computing. First, in Chapter 3, a novel setup is designed, built, and tested, that can electrostatically gate a material without endangering the materials pristine quality. The setup was designed with the goal to reveal non-Abelian...doctoral thesis 2016
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Kardakova, A. (author), Shishkin, A. (author), Semenov, A. (author), Goltsman, G.N. (author), Ryabchun, S. (author), Klapwijk, T.M. (author), Bousquet, J. (author), Eon, D. (author), Sacépé, B. (author), Klein, T. (author), Bustarret, E. (author)We report a study of the relaxation time of the restoration of the resistive superconducting state in single crystalline boron-doped diamond using amplitude-modulated absorption of (sub-)THz radiation (AMAR). The films grown on an insulating diamond substrate have a low carrier density of about 2.5×1021cm?3 and a critical temperature of about 2K...journal article 2016
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Geprägs, S. (author), Kehlberger, A. (author), Coletta, F.D. (author), Qiu, Z. (author), Guo, E.J. (author), Schulz, T. (author), Mix, C. (author), Meyer, S. (author), Kamra, A. (author), Althammer, M. (author), Huebl, H. (author), Jakob, G. (author), Ohnuma, Y. (author), Adachi, H. (author), Barker, J. (author), Maekawa, S. (author), Bauer, G.E.W. (author), Saitoh, E. (author), Gross, R. (author), Goennenwein, S.T.B. (author), Kläui, M. (author)Magnons are the elementary excitations of a magnetically ordered system. In ferromagnets, only a single band of low-energy magnons needs to be considered, but in ferrimagnets the situation is more complex owing to different magnetic sublattices involved. In this case, low lying optical modes exist that can affect the dynamical response. Here we...journal article 2016
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- Scarlino, P. (author) doctoral thesis 2016