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Kok, Pieter |
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Title |
Quantum optics: Entangled photons report for duty |
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2010 |
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Nature Photonics |
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Nat. Photon. |
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4 |
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8 |
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504-505 |
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fromIPMRAS |
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Entangled photons are a key ingredient in optical quantum technologies, but researchers have so far been unable to produce a single pair of entangled photons. Now, two groups from China and Austria independently report just that, with a technique that avoids the need to infer entanglement from detection signatures. |
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772 |
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Author |
Kono, Junichiro |
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Title |
Coherent terahertz control |
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Journal Article |
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2011 |
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Nature Photonics |
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Nat. Photon. |
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5 |
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5-6 |
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fromIPMRAS |
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Spin and charge terahertz excitations in solids are promising for implementing future technologies such as spintronics and quantum computation, but coherently controlling them has been a significant challenge. Researchers have now manipulated coherent spin waves in an antiferromagnet using the intense magnetic field of ultrashort terahertz pulses. |
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773 |
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Konstantatos, Gerasimos; Sargent, Edward H. |
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Title |
Nanostructured materials for photon detection |
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2010 |
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Nature Nanotechnology |
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Nat. Nanotech. |
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5 |
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6 |
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391–400 |
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The detection of photons underpins imaging, spectroscopy, fibre-optic communications and time-gated distance measurements. Nanostructured materials are attractive for detection applications because they can be integrated with conventional silicon electronics and flexible, large-area substrates, and can be processed from the solution phase using established techniques such as spin casting, spray coating and layer-by-layer deposition. In addition, their performance has improved rapidly in recent years. Here we review progress in light sensing using nanostructured materials, focusing on solution-processed materials such as colloidal quantum dots and metal nanoparticles. These devices exhibit phenomena such as absorption of ultraviolet light, plasmonic enhancement of absorption, size-based spectral tuning, multiexciton generation, and charge carrier storage in surface and interface traps. |
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684 |
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Korotkov, Alexander N. |
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Entanglement preservation: The Sleeping Beauty approach |
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2012 |
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Nature Physics |
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Nat. Phys. |
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8 |
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2 |
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107-108 |
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Two-qubit entanglement can be preserved by partially measuring the qubits to leave them in a 'lethargic' state. The original state is restored using quantum measurement reversal after the qubits have travelled through a decoherence channel. |
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RPLAB @ gujma @ |
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814 |
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Kosako, Terukazu; Kadoya, Yutaka; Hofmann, Holger F. |
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Directional control of light by a nano-optical Yagi–Uda antenna |
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2010 |
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Nature Photonics |
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Nat. Photon. |
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4 |
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312 - 315 |
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optical antennas |
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The plasmon resonance of metal nanoparticles can direct light from optical emitters in much the same way that radiofrequency antennas direct the emission from electrical circuits. Recently, rapid progress has been made in the realization of single-element antennas for optical waves. Because most of these devices are designed to optimize the local near-field coupling between the antenna and an emitter, the possibility of modifying the spatial radiation pattern has not yet received as much attention. In the radiofrequency regime, a typical antenna design for high directivity is the Yagi–Uda antenna, which essentially consists of a one-dimensional array of antenna elements driven by a single feed element. By fabricating a corresponding array of nanoparticles, similar radiation patterns can be obtained in the optical regime. Here, we present the experimental demonstration of directional control of radiation from a nano-optical Yagi–Uda antenna composed of appropriately tuned gold nanorods. |
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RPLAB @ gujma @ |
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747 |
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