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A 2 × 2 array receiver at 1.4 THz based on HEB mixers and a Fourier phase grating local oscillator

Liu, X.X. (author), Hayton, D.J. (author), Luo, Y.C. (author), Wei, L. (author), Vercruyssen, N. (author), Gao, J.R. (author), Groppi, C. (author)

We report on realization of a 2 × 2 NbN hot electron bolometer (HEB) array receiver using multiple local oscillator (LO) beams that are obtained from a Fourier phase grating mirror. The grating splits a 1.4 THz single beam into four uniform sub-beams. Two 50mm lenses are applied to collimate each beam in order to achieve a spacing of 12mm...

conference paper 2015

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Fourier phase grating for THz multi-beam local oscillators

Luo, Y.C. (author), Liu, X.X. (author), Hayton, D.J. (author), Wei, L. (author), Gao, J.R. (author), Groppi, C. (author)

A Fourier phase grating mirror will be applied to split a single, coherent terahertz source beam into multi-beams, which are spatially distributed as required for the local oscillator in an array receiver. We report on the simulation, design and fabrication of a Fourier phase grating at 1.25 THz for generating 2×2 beams, and the measurements at...

conference paper 2015

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Asymmetric current-phase relation due to spin-orbit interaction in semiconductor nanowire Josephson junction

Yokoyama, T. (author), Eto, M. (author), Nazarov, Y.V. (author)

We theoretically study the current-phase relation in semiconductor nanowire Josephson junction in the presence of spin-orbit interaction. In the nanowire, the impurity scattering with strong SO interaction is taken into account using the random matrix theory. In the absence of magnetic field, the Josephson current I and phase difference ?...

conference paper 2012

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Quantum state steering by real-time adaptive measurements on a single nuclear spin

Blok, M.S. (author), Bonato, C. (author), Dobrovitski, V.V. (author), Hanson, R. (author)

We present our most recent results on partial measurements of a nuclear spin in which the inevitable measurement back-action is controllably reduced. The post-selected measurement results can give rise to weak values. By using a real-time adaptive scheme the quantum state can be tuned using only measurements.

conference paper 2013

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Single-Shot Readout of Singlet-Triplet Qubit States in a Si/SiGe Double Quantum Dot (abstract)

Prance, J.R. (author), Shi, Z. (author), Simmons, C.B. (author), Savage, D.E. (author), Lagally, M.G. (author), Schreiber, L.R. (author), Vandersypen, L.M.K. (author), Friesen, M. (author), Joynt, R. (author), Coppersmith, S.N. (author), Eriksson, M.A. (author)

conference paper 2012

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Antenna-coupled 30 THz hot electron bolometer mixers

Shcherbatenko, M. (author), Lobanov, Y. (author), Benderov, O. (author), Shurakov, A. (author), Ignatov, A. (author), Titova, N. (author), Finkel, M. (author), Maslennikov, S. (author), Kaurova, N. (author), Voronov, B.M. (author), Rodin, A. (author), Klapwijk, T.M. (author), Gol'tsman, G.N. (author)

We report on design and characterization of a superconducting Hot Electron Bolometer Mixer integrated with a logarithmic spiral antenna for mid-IR range observations. The antenna parameters have been adjusted to achieve the ultimate performance at 10 ?m (30 THz) range where O3, NH3, CO2, CH4, N2O, …. lines in the Earth’s atmosphere, in planetary...

conference paper 2015

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Quantum Measurements using Diamond Spins: From Fundamental Tests to Long-Distance Teleportation

Hanson, R. (author)

Spin qubits in diamond provide an excellent platform both for fundamental tests and for realizing extended quantum networks . Here we present our latest results, including the deterministic teleportation over three meters.

conference paper 2014

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Photon pair generation and manipulation in an integrated silicon chip

Bonneau, D. (author), Silverstone, J.W. (author), Hadfield, R.H. (author), Zwiller, V. (author), Ohira, K. (author), Suzuki, N. (author), Yoshida, H. (author), Iizuka, N. (author), Ezaki, M. (author), Rarity, J.G. (author), O'Brien, J.L. (author), Thompson, M.G. (author)

Quantum photonics is a promising technology for implementing quantum information tasks. We demonstrate integration of multiple photon pair sources together with a circuit enabling creation and manipulation of photon pairs in a monolithic silicon-on-insulator chip.

conference paper 2013

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Manipulating a spin qubit by the backaction of sequential partial adaptive measurements

Bonato, C. (author), Blok, M.S. (author), Markham, M.L. (author), Twitchen, D.J. (author), Dobrovitski, V.V. (author), Hanson, R. (author)

We report the control-free manipulation of a nuclear spin qubit in diamond, using only the backaction of sequential partial measurements with real-time feedback.

conference paper 2014

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A liquid of optical vortices in a photonic sea of vector waves

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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A Wideband Leaky Lens Antenna with Frequency-Stable Beams for DESHIMA Spectrometer

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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Topological Protection in Radiative Photonic Crystal Cavities

Barczyk, R.T. (author), Parappurath, N. (author), Arora, S. (author), Bauer, T.A. (author), Kuipers, L. (author), Verhagen, E. (author)

We study the signatures of topological light confinement in the leakage radiation of two-dimensional topological photonic crystal cavities that feature the quantum spin Hall effect at telecom wavelengths. The mode profiles in real and momentum space are retrieved using far field imaging and Fourier spectropolarimetry. We examine the scaling...

conference paper 2022

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Ultra-high system detection efficiency superconducting nanowire single-photon detectors for quantum photonics and life sciences

Lopez Rodriguez, B. (author), Chang, J. (author), Los, Johannes W.N. (author), Steinhauer, Stephan (author), Zwiller, Val (author), Esmaeil Zadeh, I.Z. (author)

Ultra-high system detection efficiency (SDE) s uperconducting nanowire single-photon detectors are demonstrated for a broad range of wavelengths, from UV to mid-infrared, opening novel possibilities in the fields of quantum photonics, neuroimaging and astronomy.

conference paper 2022

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Sub-mm-Wave Superconducting On-Chip Filter Bank for Astronomy

Pascual Laguna, A. (author), Karatsu, K. (author), Thoen, David (author), Murugesan, V. (author), Endo, A. (author), Baselmans, J.J.A. (author)

A superconducting on-chip microstrip filter bank spectrometer prototype for Far-Infrared (FIR) Astronomy is presented. The measurements showcase its capabilities towards moderate spectral resolution (f/\Delta f\sim 500) broadband FIR spectroscopy. In this sub-mm-wave filter bank, each spectral channel consists of an 'I-shaped' microstrip THz...

conference paper 2020

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The dating game at dimension zero: creation and annihilation of phase singularities in optical random waves

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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Reconstructing the scattering matrix of photonic systems from quasinormal modes

Alpeggiani, F. (author), Parappurath, N. (author), Verhagen, Ewold (author), Kuipers, L. (author)

The scattering matrix is a fundamental tool to quantitatively describe the properties of resonant systems. In particular, it enables the understanding of many photonic devices of current interest, such as photonic metasurfaces and nanostructured optical scatterers. In this contribution, we show that the scattering matrix of a photonic system...

conference paper 2017

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Compact amorphous-silicon visible-light monitor integrated in silicon nitride waveguides

De Vita, Christian (author), Klitis, Charalambos (author), Codreanu, N. (author), Ferrari, Giorgio (author), Sorel, Marc (author), Melloni, Andrea (author), Morichetti, Francesco (author)

This work reports on the realization of an amorphous silicon visible-light detector integrated in Si3N4 waveguides. The device is very compact (< 40 μm), has a responsivity of about 10 mA/W and a sensitivity of -40 dBm.

conference paper 2022

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The origin and limit of asymmetric transmission in chiral resonators

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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Photodetection with novel materials: Colloidal quantum dots nanoribbons and layered materials

Buscema, M. (author)

doctoral thesis 2015

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Signatures of Majorana Fermions in Hybrid Superconductor-Semiconductor Nanowire Devices

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