Nature Photonics contents April 2014 Volume 8 Number 4 pp265-340

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Advertisement A*STAR Research - Highlighting the best of research at the Agency for Science, Technology and Research (A*STAR), Singapore?fs premier research organization   Recent Highlights Materials: Probing polarization puzzles | Energy harvesting: Multilayer polymers spring into action  Download the A*STAR Research app now! TABLE OF CONTENTS April 2014 Volume 8, Issue 4 Editorial Research Highlights News and Views Review Letters Articles Interview Subscribe   Facebook   RSS   Recommend to library   Twitter   Advertisement Nature Chemistry is 5  Nature Chemistry is now five years old! To celebrate, we look at some facts and figures relating to the manuscripts that have passed through our hands ? including information about how many submissions we have received and where they came from, our referee pool, the authors and titles of published papers, as well as some citation data. Each editor has also picked out one of their favourite papers and explains why it stood out for them. Selected content free to registered users until April 22nd   Editorial Top Photonics West 2014   p265 doi:10.1038/nphoton.2014.76 The convergence of micro-optics and microelectromechanical systems continues to spawn new directions in optics. Research Highlights Top Solar energy: Hot idea | Nonlinear optics: Supercontinuum on a chip | Silicon photonics: Stalking light | Quantum dots: Two-colour emission | Quantum cryptography: Room-temperature detection | Nonlinear imaging: Artwork analysis | Metamaterials: Changing phase | Diode lasers: Ultrastable frequency | Animal vision: Colour perception | Laser accelerators: Treating tumours News and Views Top Organic light-emitting diodes: Phosphorescence meets its match   pp269 - 270 Sebastian Reineke doi:10.1038/nphoton.2014.78 The advent of novel fluorophores that harness thermally activated energy transfer processes is resulting in a new breed of highly efficient organic light-emitting diodes. See also: Article by Zhang et al. Tomography: Movies of evolving objects from a single laser shot   p271 Simon Pleasants doi:10.1038/nphoton.2014.56 Optical physics: Extending filamentation   pp271 - 273 Gunter Steinmeyer and Carsten Brée doi:10.1038/nphoton.2014.59 The introduction of a dressing beam to extend the reach of filaments promises a wealth of new applications that extend beyond the laboratory scale. See also: Letter by Scheller et al. Quantum plasmonics: Two-plasmon interference   pp273 - 275 Michael Steel doi:10.1038/nphoton.2014.61 A new experiment demonstrates the first unequivocally quantum two-particle interference with surface plasmons. Subwavelength optical quantum information processing may be just around the corner. See also: Letter by Fakonas et al. Quantum optics: Entanglement a trois    pp275 - 276 Geoff J. Pryde doi:10.1038/nphoton.2014.60 Guaranteed entanglement sharing over long distances can be verified by violating a Bell inequality. That's a tricky enough proposition in itself, but what if more than two parties are involved? See also: Letter by Erven et al. Photonics JOBS of the week PhD Position- Laboratory of Applied Photonics Devices Ecole Polytechnique Fédérale de Lausanne (EPFL) PhD Position: Quantum Optics in Integrated Structures University of Southampton Postdoctoral position in experimental quantum optics Universidad De Los Andes, Colombia Fully-funded PhD studentship in Ultrafast Imaging and Quantum Dynamics University of Edinburgh Quantum nano-optomechanics on a chip Université Paris Diderot More Science jobs from Photonics EVENT SPIE Optics + Photonics Exhibition 2014 19.08.14 San Diego, USA More science events from Review Top Hollow-core photonic crystal fibres for gas-based nonlinear optics   pp278 - 286 P. St. J. Russell, P. Hölzer, W. Chang, A. Abdolvand and J. C. Travers doi:10.1038/nphoton.2013.312 Hollow-core photonic crystal fibres are attractive because they exhibit pressure-adjustable normal or anomalous dispersion, low-loss guidance, very low nonlinearity and high damage threshold. This Review overviews nonlinear optical phenomena in gas-filled, hollow-core photonic crystal fibres that may lead to a new generation of versatile and efficient pulse-compression devices and gas-based light sources. Letters Top Broadband single-photon-level memory in a hollow-core photonic crystal fibre   pp287 - 291 M. R. Sprague, P. S. Michelberger, T. F. M. Champion, D. G. England, J. Nunn et al. doi:10.1038/nphoton.2014.45 An optical memory is demonstrated in a kagome photonic crystal fibre whose 26-μm-diameter hollow core is loaded with cesium atoms. Gigahertz-bandwidth light is stored using a far-detuned Raman interaction. It has a memory efficiency is 27 ± 1% and a signal-to-noise ratio of 2.6:1 — the highest at the single-photon level of any memory at room temperature. See also: Interview with Michael Sprague Experimental three-photon quantum nonlocality under strict locality conditions   pp292 - 296 C. Erven, E. Meyer-Scott, K. Fisher, J. Lavoie, B. L. Higgins et al. doi:10.1038/nphoton.2014.50 Violation of the classical bound of the three-particle Mermin inequality by nine standard deviations is experimentally demonstrated by closing both the locality and freedom-of-choice loopholes; only the fair-sampling assumption is required. To achieve this, a light source for producing entangled multiphoton states and measurement technologies for precise timing and efficient detection were developed. See also: News and Views by Pryde Externally refuelled optical filaments   pp297 - 301 Maik Scheller, Matthew S. Mills, Mohammad-Ali Miri, Weibo Cheng, Jerome V. Moloney et al. doi:10.1038/nphoton.2014.47 Plasma channels induced in air by femtosecond-laser filamentation are useful for many applications, including attosecond physics and spectroscopy and remote sensing. By appropriately employing a surrounding auxiliary dressing beam to continuously supply energy to the filament, the natural range of the plasma column has been extended by at least one order of magnitude. See also: News and Views by Steinmeyer & Brée Isotropic three-dimensional super-resolution imaging with a self-bending point spread function   pp302 - 306 Shu Jia, Joshua C. Vaughan and Xiaowei Zhuang doi:10.1038/nphoton.2014.13 By exploiting a self-bending point spread function based on Airy beams, a three-dimensional super-resolution fluorescence imaging is realized. A three-dimensional localization precision in the range 10-15 nm was obtained at an imaging depth of 3 µm from ∼2,000 photons per localization. Tip-enhanced infrared nanospectroscopy via molecular expansion force detection   pp307 - 312 Feng Lu, Mingzhou Jin and Mikhail A. Belkin doi:10.1038/nphoton.2013.373 Mid-infrared spectroscopy with nanometre spatial resolution is highly desired for materials and life sciences applications. A nanoscale mid-infrared spectrometer is demonstrated that detects mechanical forces exerted by molecules on an atomic force microscope tip upon light excitation. It operates under ambient conditions with a high sensitivity and a spatial resolution of better than 25 nm. X-ray two-photon absorption competing against single and sequential multiphoton processes   pp313 - 316 Kenji Tamasaku, Eiji Shigemasa, Yuichi Inubushi, Tetsuo Katayama, Kei Sawada et al. doi:10.1038/nphoton.2014.10 The first observation of a third-order process induced by an X-ray beam from a free-electron laser is realized in germanium using a 5.6-keV X-ray beam. Two-photon absorption is confirmed, suggesting that X-ray analogues of other third-order nonlinear processes may be available for exploitation in X-ray experiments. Two-plasmon quantum interference   pp317 - 320 James S. Fakonas, Hyunseok Lee, Yousif A. Kelaita and Harry A. Atwater doi:10.1038/nphoton.2014.40 Researchers demonstrate unequivocal quantum interference between plasmons in a Hong-Ou-Mandel experiment. The results may be important for quantum information applications of plasmonics. See also: News and Views by Steel Optomechanical self-structuring in a cold atomic gas   pp321 - 325 G. Labeyrie, E. Tesio, P. M. Gomes, G.-L. Oppo, W. J. Firth et al. doi:10.1038/nphoton.2014.52 A simple experiment enables simultaneous long-range spatial structuring of a cold atomic cloud and an optical pump field, with an adjustable length scale. Articles Top Efficient blue organic light-emitting diodes employing thermally activated delayed fluorescence   pp326 - 332 Qisheng Zhang, Bo Li, Shuping Huang, Hiroko Nomura, Hiroyuki Tanaka & Chihaya Adachi doi:10.1038/nphoton.2014.12 Blue organic light-emitting diodes that harness thermally activated delayed fluorescence are realized with an external quantum efficiency of 19.5% and reduced roll-off at high luminance. See also: News and Views by Reineke Measurement-based noiseless linear amplification for quantum communication   pp333 - 338 Helen M. Chrzanowski, Nathan Walk, Syed M. Assad, Jiri Janousek, Sara Hosseini et al. doi:10.1038/nphoton.2014.49 Emulation of noiseless linear amplification of quantum states of light is demonstrated by post-selection of measurement data obtained by heterodyne detection. Using this protocol, Einstein-Podolsky-Rosen entanglement is recovered after its degradation by transmission loss. This protocol is applicable to other quantum communication protocols, including teleportation and remote state preparation. Interview Top Hollow memories   p340 Interview with Michael Sprague doi:10.1038/nphoton.2014.77 A hollow-core optical fibre filled with warm caesium atoms can temporarily store the properties of photons. Michael Sprague from the University of Oxford, UK, explains to Nature Photonics how this optical memory could be a useful building block for fibre-based quantum optics. See also: Letter by Sprague et al. Top Advertisement Download the new NatureJournals app and gain access to Nature and all Nature-branded research and review journals. All news content and open access articles are free. Subscribe to additional journals in the app for just $35.99*.  *Apple exchange rates apply. Limited time offer available on all journals except Scientific Reports. iPad, iPhone and iPod touch are trademarks of Apple Inc.   Natureevents is a fully searchable, multi-disciplinary database designed to maximise exposure for events organisers. The contents of the Natureevents Directory are now live. The digital version is available here. Find the latest scientific conferences, courses, meetings and symposia on natureevents.com. 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