Searched for: department:"QN%5C%7Eslsh%7EQuantum%5C+Nanoscience"
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Noordam, M.L. (author), Hernandez Rueda, F.J. (author), Talsma, L. Y. (author), Kuipers, L. (author)
Nanostructured gratings in a metal surface can highly enhance nonlinear optical processes. The geometrical parameters that characterize a grating can be optimized to achieve intense near-fields, which in turn enhance the nonlinear optical signals. For a nonlinear process that involves multiple frequencies, like four-wave mixing (FWM), the...
journal article 2020
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Parappurath, Nikhil (author), Alpeggiani, F. (author), Kuipers, L. (author), Verhagen, Ewold (author)
Topological protection in photonics offers new prospects for guiding and manipulating classical and quantum information. The mechanism of spin-orbit coupling promises the emergence of edge states that are helical, exhibiting unidirectional propagation that is topologically protected against back scattering. We directly observe the topological...
journal article 2020
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Gong, S. (author), Komen, I. (author), Alpeggiani, F. (author), Kuipers, L. (author)
Valley pseudospin has emerged as a good quantum number to encode information, analogous to spin in spintronics. Two-dimensional transition metal dichalcogenides (2D TMDCs) recently attracted enormous attention for their easy access to the valley pseudospin through valley-dependent optical transitions. Different ways have been reported to read...
journal article 2020
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Bolhuis, M. (author), Hernandez Rueda, F.J. (author), van Heijst, S.E. (author), Tinoco Rivas, M. (author), Kuipers, L. (author), Conesa Boj, S.C. (author)
Transition metal dichalcogenides such as MoS2 represent promising candidates for building blocks of ultra-thin nanophotonic devices. For such applications, vertically-oriented MoS2 (v-MoS2) nanosheets could be advantageous as compared to conventional horizontal MoS2 (h-MoS2) given that their inherent broken symmetry would favor an enhanced...
journal article 2020
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Nowak, M. P. (author), Wimmer, M.T. (author), Akhmerov, A.R. (author)
We theoretically study coherent multiple Andreev reflections in a biased three-terminal Josephson junction. We demonstrate that the direct current flowing through the junction consists of supercurrent components when the bias voltages are commensurate. This dissipationless current depends on the phase in the superconducting leads and stems...
journal article 2019
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Alpeggiani, F. (author), Kuipers, L. (author)
Bichromatic photonic crystal structures are based on the coexistence of two different periodicities in the dielectric constant profile. They are realized starting from a photonic crystal waveguide and modifying the lattice constant only in the waveguide region. In this work, we numerically investigate the spectral and topological properties...
journal article 2019
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Al Nahas, K. (author), Cama, J. (author), Schaich, M. (author), Hammond, K. (author), Deshpande, S. (author), Dekker, C. (author), Ryadnov, M. G. (author), Keyser, U. F. (author)
The spread of bacterial resistance against conventional antibiotics generates a great need for the discovery of novel antimicrobials. Polypeptide antibiotics constitute a promising class of antimicrobial agents that favour attack on bacterial membranes. However, efficient measurement platforms for evaluating their mechanisms of action in a...
journal article 2019
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Karatsu, K. (author), Endo, A. (author), Bueno Lopez, J. (author), de Visser, P.J. (author), Barends, R. (author), Thoen, David (author), Murugesan, V. (author), Tomita, T. (author), Baselmans, J.J.A. (author)
For space observatories, the glitches caused by high energy phonons created by the interaction of cosmic ray particles with a detector substrate lead to dead time during observation. Mitigating the impact of cosmic rays is therefore an important requirement for detectors to be used in future space missions. In order to investigate possible...
journal article 2019
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le Feber, B. (author), Sipe, J. E. (author), Wulf, M. (author), Kuipers, L. (author), Rotenberg, N. (author)
Light is a union of electric and magnetic fields, and nowhere is the complex relationship between these fields more evident than in the near fields of nanophotonic structures. There, complicated electric and magnetic fields varying over subwavelength scales are generally present, which results in photonic phenomena such as extraordinary...
journal article 2019
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Spaeth, Patrick (author), Adhikari, Subhasis (author), Le, Laurent (author), Jollans, Thomas (author), Pud, S. (author), Albrecht, Wiebke (author), Bauer, T.A. (author), Caldarola, M. (author), Kuipers, L. (author), Orrit, Michel (author)
Circular dichroism (CD) spectroscopy is a powerful optical technique for the study of chiral materials and molecules. It gives access to an enantioselective signal based on the differential absorption of right and left circularly polarized light, usually obtained through polarization analysis of the light transmitted through a sample of...
journal article 2019
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Jansen, E. (author), Pereira Machado, J.D. (author), Blanter, Y.M. (author)
We consider an electromechanical system in which a microwave cavity is coupled to a mechanical resonator, with a mechanical frequency twice the microwave frequency. In this regime, the effective photon-phonon interaction is equivalent to that of a degenerate parametric amplifier, instead of the typical radiation pressure interaction. If the...
journal article 2019
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Davidovikj, D. (author), Poot, M. (author), Cartamil Bueno, S.J. (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author)
For the study and application of graphene membranes, it is essential to have means to control their resonance frequency and temperature. Here, we present an on-chip heater platform for local tuning of in-plane tension in graphene mechanical resonators. By Joule heating of a metallic suspension ring we show thermomechanical resonance frequency...
journal article 2018
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Alpeggiani, F. (author), Bliokh, K. Y. (author), Nori, F. (author), Kuipers, L. (author)
Optical helicity density is usually discussed for monochromatic electromagnetic fields in free space. It plays an important role in the interaction with chiral molecules or nanoparticles. Here we introduce the optical helicity density in a dispersive isotropic medium. Our definition is consistent with biorthogonal Maxwell electromagnetism in...
journal article 2018
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Gong, S. (author), Alpeggiani, F. (author), Sciacca, Beniamino (author), Garnett, Erik C. (author), Kuipers, L. (author)
The emergence of two-dimensional transition metal dichalcogenide materials has sparked intense activity in valleytronics, as their valley information can be encoded and detected with the spin angular momentum of light. We demonstrate the valley-dependent directional coupling of light using a plasmonic nanowire-tungsten disulfide (WS<sub>2<...
journal article 2018
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Baeva, E. M. (author), Sidorova, M. V. (author), Korneev, A. A. (author), Smirnov, K. V. (author), Divochy, A. V. (author), Morozov, P. V. (author), Zolotov, P. I. (author), Vakhtomin, Yu B. (author), Klapwijk, T.M. (author)
We investigate thermal properties of a NbN single-photon detector capable of unit internal detection efficiency. Using an independent calibration of the coupling losses, we determine the absolute optical power absorbed by the NbN film and, via resistive superconductor thermometry, the temperature dependence of the thermal resistance Z(T) of...
journal article 2018
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Alpeggiani, F. (author), Gong, Su Hyun (author), Kuipers, L. (author)
The two-dimensional excitons of transition metal dichalcogenide (TMDC) monolayers make these materials extremely promising for optical and optoelectronic applications. When the excitons interact with the electromagnetic field, they will give rise to exciton-polaritons, i.e., modes that propagate in the material plane while being confined in...
journal article 2018
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Verschueren, D.V. (author), Pud, S. (author), Shi, X. (author), de Angelis, L. (author), Kuipers, L. (author), Dekker, C. (author)
Solid-state nanopores are single-molecule sensors that hold great potential for rapid protein and nucleic-acid analysis. Despite their many opportunities, the conventional ionic current detection scheme that is at the heart of the sensor suffers inherent limitations. This scheme intrinsically couples signal strength to the driving voltage,...
journal article 2018
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Jöns, K.D. (author), Schweickert, L.S. (author), Versteegh, M.A.M. (author), Dalacu, Dan (author), Poole, Philip J. (author), Gulinatti, Angelo (author), Giudice, Andrea (author), Zwiller, V.G. (author), Reimer, M.E. (author)
Global, secure quantum channels will require efficient distribution of entangled photons. Long distance, low-loss interconnects can only be realized using photons as quantum information carriers. However, a quantum light source combining both high qubit fidelity and on-demand bright emission has proven elusive. Here, we show a bright photonic...
journal article 2017
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Langford, N.K. (author), Sagastizabal, R.E. (author), Kounalakis, M. (author), Dickel, C. (author), Bruno, A. (author), Lüthi, F. (author), Thoen, David (author), Endo, A. (author), DiCarlo, L. (author)
The quantum Rabi model describing the fundamental interaction between light and matter is a cornerstone of quantum physics. It predicts exotic phenomena like quantum phase transitions and ground-state entanglement in ultrastrong and deep-strong coupling regimes, where coupling strengths are comparable to or larger than subsystem energies....
journal article 2017
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de Angelis, L. (author), Alpeggiani, F. (author), Di Falco, Andrea (author), Kuipers, L. (author)
Phase singularities are locations where light is twisted like a corkscrew, with positive or negative topological charge depending on the twisting direction. Among the multitude of singularities arising in random wave fields, some can be found at the same location, but only when they exhibit opposite topological charge, which results in their...
journal article 2017
Searched for: department:"QN%5C%7Eslsh%7EQuantum%5C+Nanoscience"
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