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Author |
Novotny, Lukas; van Hulst, Niek |
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Title |
Antennas for light |
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Journal Article |
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Year |
2011 |
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Nature Photonics |
Abbreviated Journal |
Nat. Photon. |
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5 |
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2 |
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83-90 |
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optical antennas |
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Abstract ![sorted by Abstract field, ascending order (up)](img/sort_asc.gif) |
Optical antennas are devices that convert freely propagating optical radiation into localized energy, and vice versa. They enable the control and manipulation of optical fields at the nanometre scale, and hold promise for enhancing the performance and efficiency of photodetection, light emission and sensing. Although many of the properties and parameters of optical antennas are similar to their radiowave and microwave counterparts, they have important differences resulting from their small size and the resonant properties of metal nanostructures. This Review summarizes the physical properties of optical antennas, provides a summary of some of the most important recent developments in the field, discusses the potential applications and identifies the future challenges and opportunities. |
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RPLAB @ gujma @ |
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748 |
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Nozaki, Kengo; Shinya, Akihiko; Matsuo, Shinji; Suzaki, Yasumasa; Segawa, Toru; Sato, Tomonari; Kawaguchi, Yoshihiro; Takahashi, Ryo; Notomi, Masaya |
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Title |
Ultralow-power all-optical RAM based on nanocavities |
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Journal Article |
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Year |
2012 |
Publication |
Nature Photonics |
Abbreviated Journal |
Nat. Photon. |
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Volume |
6 |
Issue |
4 |
Pages |
248-252 |
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fromIPMRAS |
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Abstract ![sorted by Abstract field, ascending order (up)](img/sort_asc.gif) |
Optical random-access memory (o-RAM) has been regarded as one of the most difficult challenges in terms of replacing its various functionalities in electronic circuitry with their photonic counterparts. Nevertheless, it constitutes a key device in optical routing and processing. Here, we demonstrate that photonic crystal nanocavities with an ultrasmall buried heterostructure design can solve most of the problems encountered in previous o-RAMs. By taking advantage of the strong confinement of photons and carriers and allowing heat to escape efficiently, we have realized all-optical RAMs with a power consumption of only 30 nW, which is more than 300 times lower than the previous record, and have achieved continuous operation. We have also demonstrated their feasibility in multibit integration. This paves the way for constructing a low-power large-scale o-RAM system that can handle high-bit-rate optical signals. |
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RPLAB @ gujma @ |
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786 |
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Author |
Fazal, Furqan M.; Block, Steven M. |
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Title |
Optical tweezers study life under tension |
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Journal Article |
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Year |
2011 |
Publication |
Nature Photonics |
Abbreviated Journal |
Nat. Photon. |
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Volume |
5 |
Issue |
6 |
Pages |
318-321 |
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fromIPMRAS |
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Optical tweezers have become one of the primary weapons in the arsenal of biophysicists, and have revolutionized the new field of single-molecule biophysics. Today's techniques allow high-resolution experiments on biological macromolecules that were mere pipe dreams only a decade ago. |
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RPLAB @ gujma @ |
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776 |
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Usmani, Imam; Clausen, Christoph; Bussières, Félix; Sangouard, Nicolas; Afzelius, Mikael; Gisin, Nicolas |
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Title |
Heralded quantum entanglement between two crystals |
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Journal Article |
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Year |
2012 |
Publication |
Nature Photonics |
Abbreviated Journal |
Nat. Photon. |
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Volume |
6 |
Issue |
4 |
Pages |
234-237 |
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fromIPMRAS |
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Quantum networks must have the crucial ability to entangle quantum nodes. A prominent example is the quantum repeater, which allows the distance barrier of direct transmission of single photons to be overcome, provided remote quantum memories can be entangled in a heralded fashion. Here, we report the observation of heralded entanglement between two ensembles of rare-earth ions doped into separate crystals. A heralded single photon is sent through a 50/50 beamsplitter, creating a single-photon entangled state delocalized between two spatial modes. The quantum state of each mode is subsequently mapped onto a crystal, leading to an entangled state consisting of a single collective excitation delocalized between two crystals. This entanglement is revealed by mapping it back to optical modes and by estimating the concurrence of the retrieved light state. Our results highlight the potential of crystals doped with rare-earth ions for entangled quantum nodes and bring quantum networks based on solid-state resources one step closer. |
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RPLAB @ gujma @ |
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793 |
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Author |
Pile, David |
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Title |
How many bits can a photon carry |
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Journal Article |
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Year |
2012 |
Publication |
Nature Photonics |
Abbreviated Journal |
Nat. Photon. |
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Volume |
6 |
Issue |
1 |
Pages |
14-15 |
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fromIPMRAS |
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Quantum physics offers a way to enhance the amount of information a photon can carry, with potential applications in optical communication, lithography, metrology and imaging. |
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View from... OSA Frontiers in Optics 2011: How many bits can a photon carry? |
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no |
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Call Number |
RPLAB @ gujma @ |
Serial |
780 |
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Author |
Tassin, Philippe; Koschny, Thomas; Kafesaki, Maria; Soukoulis, Costas M. |
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Title |
A comparison of graphene, superconductors and metals as conductors for metamaterials and plasmonics |
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Journal Article |
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Year |
2012 |
Publication |
Nature Photonics |
Abbreviated Journal |
Nat. Photon. |
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Volume |
6 |
Issue |
4 |
Pages |
259-264 |
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fromIPMRAS |
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Recent advancements in metamaterials and plasmonics have promised a number of exciting applications, in particular at terahertz and optical frequencies. Unfortunately, the noble metals used in these photonic structures are not particularly good conductors at high frequencies, resulting in significant dissipative loss. Here, we address the question of what is a good conductor for metamaterials and plasmonics. For resonant metamaterials, we develop a figure-of-merit for conductors that allows for a straightforward classification of conducting materials according to the resulting dissipative loss in the metamaterial. Application of our method predicts that graphene and high-Tc superconductors are not viable alternatives for metals in metamaterials. We also provide an overview of a number of transition metals, alkali metals and transparent conducting oxides. For plasmonic systems, we predict that graphene and high-Tc superconductors cannot outperform gold as a platform for surface plasmon polaritons, because graphene has a smaller propagation length-to-wavelength ratio. |
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RPLAB @ gujma @ |
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790 |
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Author |
Xu, XinAn; Wong, Chee Wei |
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Title |
Quantum optics: Correlations on a chip |
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Journal Article |
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Year |
2012 |
Publication |
Nature Photonics |
Abbreviated Journal |
Nat. Photon. |
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Volume |
6 |
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Pages |
75-76 |
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fromIPMRAS |
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Researchers have developed a semiconductor structure capable of supporting quantum correlations between photons and strong single-photon nonlinearities, thus paving the way for the development of chip-based devices for quantum secure communications and quantum information processing. |
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RPLAB @ gujma @ |
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782 |
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Author |
Gao, Jie; McMillan, James F.; Wong, Chee Wei |
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Title |
Nanophotonics: Remote on-chip coupling |
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Journal Article |
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2012 |
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Nature Photonics |
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Nat. Photon. |
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6 |
Issue |
1 |
Pages |
7-8 |
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fromIPMRAS |
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Scientists have demonstrated strongly coupled photon states between two distant high-Q photonic crystal cavities connected by a photonic crystal waveguide. Remote dynamic control over the coupled states could aid the development of delay lines, optical buffers and qubit operations in both classical and quantum information processing. |
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RPLAB @ gujma @ |
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779 |
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Author |
Williams, Benjamin S. |
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Title |
Terahertz quantum-cascade lasers |
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2007 |
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Nature Photonics |
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1 |
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517-525 |
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QCL review |
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Six years after their birth, terahertz quantum-cascade lasers can now deliver milliwatts or more of continuous-wave coherent radiation throughout the terahertz range — the spectral regime between millimetre and infrared wavelengths, which has long resisted development. This paper reviews the state-of-the-art and future prospects for these lasers, including efforts to increase their operating temperatures, deliver higher output powers and emit longer wavelengths. |
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632 |
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Author |
Capmany, José; Gasulla, Ivana; Sales, Salvador |
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Title |
Microwave photonics: Harnessing slow light |
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2011 |
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Nature Photonics |
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Nat. Photon. |
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5 |
Issue |
12 |
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731-733 |
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fromIPMRAS |
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Abstract ![sorted by Abstract field, ascending order (up)](img/sort_asc.gif) |
Slow-light techniques originally conceived for buffering high-speed digital optical signals now look set to play an important role in providing broadband phase and true time delays for microwave signals. |
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RPLAB @ gujma @ |
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778 |
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