Nature Photonics contents October 2012 Volume 6 Number 10 pp635-706

Advertisement Direct writing of photonic and waveguides devices without stitching errors? Visit Raith and learn why FBMS writing does not induce stitching errors in Raith electron and ion beam lithography systems. TABLE OF CONTENTS October 2012 Volume 6, Issue 10 Editorial Research Highlights News and Views Letters Articles Interview Subscribe   Facebook   RSS   Recommend to library   Twitter   Advertisement Online-only personal subscriptions now available to Nature Photonics For only 49 USD/29 GBP/29 EUR Subscribe now!   Editorial Top Portals of discovery   p635 doi:10.1038/nphoton.2012.258 Assumptions, educated guesses and intuition are often unavoidably involved in the study of new phenomena, and scientists may therefore make mistakes at the outset. However, this is part of the research process and sometimes brilliant mistakes can lead to unexpected discoveries. Research Highlights Top Silicon photonics: Under pressure | Holograms: Fast response | Magneto-optics: Quantifying magnetic light | Laser cooling: Beyond the recoil limit | Adaptive optics: Single-photon metrology | Optical communication: All-optical storage | Spintronics: Polariton spin transport | Photoelectrocatalysis: Improved efficiency | Optical trapping: Mapping trapping potential | Biophotonics: Monitoring mucus flow News and Views Top Lasers: Ultrastable silicon Fabry-Pérot cavity   pp638 - 639 Sébastien Bize doi:10.1038/nphoton.2012.234 An ultrastable optical laser based on a single-crystal silicon Fabry-Pérot cavity offers a fractional frequency instability of 1 × 10-16 on short timescales and supports a laser linewidth of less than 40 mHz at a wavelength of 1.5 μ m. Organic photonics: Blending organic building blocks   pp639 - 640 J. Sayago, F. Rosei and C. Santato doi:10.1038/nphoton.2012.235 Multifunctional organic materials can be used to make optically tunable organic transistors that can operate on microsecond timescales, thus opening new perspectives in the design of organic integrated circuits. Atom optics: Switch or split   p641 Seiji Armstrong doi:10.1038/nphoton.2012.239 Biophotonics: The slow fade of cell fluorescence   pp641 - 643 Konstantin A. Lukyanov and Vsevolod V. Belousov doi:10.1038/nphoton.2012.240 The short flash of a femtosecond laser induces a complex physiological response in mammalian cells that manifests as a slow bleaching of fluorescence from green fluorescent protein. Spintronics: All-optical spin-wave control   pp643 - 645 Mark R. Freeman and Zhu Diao doi:10.1038/nphoton.2012.241 Spin waves show promise as a means of transporting information in integrated magnetic devices, but convenient ways to control their properties are required. Now directional control of spin-wave emission using photonics has been demonstrated in an all-optical pump-probe experiment. X-Ray photonics: X-rays inspire electron movies   pp645 - 647 Marc J. J. Vrakking and Thomas Elsaesser doi:10.1038/nphoton.2012.247 The advent of high-energy, short-pulse X-ray sources based on free-electron lasers, laser plasmas and high-harmonic generation is now making it possible to probe the dynamics of electrons within molecules. X-Rays: Self-seeded FEL emits hard X-rays   pp648 - 649 Makina Yabashi and Takashi Tanaka doi:10.1038/nphoton.2012.237 X-ray free-electron lasers are bright, femtosecond X-ray sources. Researchers have now operated one in a seeding scheme that allows X-ray pulse output approaching the single-mode ideal and produces a remarkable enhancement in monochromatic power. View from... CEWQO 2012: Latent quantum nature of photons   pp649 - 650 Noriaki Horiuchi doi:10.1038/nphoton.2012.242 Researchers in the field of quantum optics are focusing not only on applications such as quantum key distribution systems, but also on fundamental investigations into phenomena illustrating the quantum nature of photons, such as quantum discord and non-Markovian behaviour. photonics JOBS of the week PhD Student Position: 2D Electronic Spectroscopy Vienna University of Technology Assistant Professor of Computational Chemistry of Materials Boston University Department of Chemistry Research Assistant (Nanophotonics and Integrated Optics) Bachelors Level Singapore University of Technology and Design More Science jobs from photonics EVENT Latin American Optics & Photonics Conference 10.-13.11.12 Sao Sebastiao, Brazil More science events from Letters Top Manipulation of cellular light from green fluorescent protein by a femtosecond laser   pp651 - 656 Hao He, Shiyang Li, Shaoyang Wang, Minglie Hu, Youjia Cao and Chingyue Wang doi:10.1038/nphoton.2012.207 Researchers describe an optical method for switching off or modifying the light emission from cells transfected with green fluorescent protein. The scheme uses the precise delivery of femtosecond laser light to induce the release of reactive oxygen species within the cell, which bleaches the fluorescence. See also: News and Views by Lukyanov & Belousov Fluorescence imaging beyond the ballistic regime by ultrasound-pulse-guided digital phase conjugation   pp657 - 661 Ke Si, Reto Fiolka and Meng Cui doi:10.1038/nphoton.2012.205 Researchers show that digital optical phase conjugation can be used to achieve focusing at record depths in highly scattering media, and report fluorescence imaging beyond the ballistic regime with a three-dimensional confined sound-modulation zone. Directional control of spin-wave emission by spatially shaped light   pp662 - 666 Takuya Satoh, Yuki Terui, Rai Moriya, Boris A. Ivanov, Kazuya Ando, Eiji Saitoh, Tsutomu Shimura and Kazuo Kuroda doi:10.1038/nphoton.2012.218 Researchers use spatially shaped light to control the direction of spin-wave emission from the ferrimagnetic insulator Gd4/3Yb2/3BiFe5O12. They capture the essential features of the observations by employing a simple model that maps the spatial profile of the pump pulse onto the dispersion relation of the spin wave. See also: News and Views by Freeman & Diao | Interview with Takuya Satoh Bridging the mid-infrared-to-telecom gap with silicon nanophotonic spectral translation   pp667 - 671 Xiaoping Liu, Bart Kuyken, Gunther Roelkens, Roel Baets, Richard M. Osgood, Jr and William M. J. Green doi:10.1038/nphoton.2012.221 Efficient four-wave-mixing process in silicon nanophotonic wires facilitates spectral translation of a signal at 2,440 nm to the telecommunications band at 1,620 nm across a span of 62 THz. This approach helps eliminate cooling requirements for the narrow-bandgap semiconductors traditionally used to detect mid-infrared photons. Articles Top Carrier multiplication between interacting nanocrystals for fostering silicon-based photovoltaics   pp672 - 679 Marco Govoni, Ivan Marri and Stefano Ossicini doi:10.1038/nphoton.2012.206 Carrier multiplication is a carrier-relaxation process that results in the generation of multiple electron-hole pairs after the absorption of a single photon. Researchers have now studied the role of nanoparticle interplay on the carrier-multiplication dynamics of two interacting silicon nanocrystals for photovoltaic applications. Object-adapted optical trapping and shape-tracking of energy-switching helical bacteria   pp680 - 686 Matthias Koch and Alexander Rohrbach doi:10.1038/nphoton.2012.232 By time-sharing optical forces, researchers show that it is possible to adapt the shape of a trapping potential to the shape of an elongated helical bacterium. This approach allows the bacterium to be held and stably oriented for several minutes, which will aid investigations into the nanomechanics of single wall-less bacteria reacting to external stimuli. A sub-40-mHz-linewidth laser based on a silicon single-crystal optical cavity   pp687 - 692 T. Kessler, C. Hagemann, C. Grebing, T. Legero, U. Sterr, F. Riehle, M. J. Martin, L. Chen and J. Ye doi:10.1038/nphoton.2012.217 Frequency stabilization in a high-finesse optical cavity is limited fundamentally by thermal-noise-induced cavity length fluctuations. Scientists have now developed a single-crystal silicon system that offers a fractional frequency instability of 1 × 10-16 at short timescales and supports a laser linewidth of less than 40 mHz at 1.5 µm. See also: News and Views by Bize Demonstration of self-seeding in a hard-X-ray free-electron laser   pp693 - 698 J. Amann, W. Berg, V. Blank, F.-J. Decker, Y. Ding, P. Emma, Y. Feng, J. Frisch, D. Fritz, J. Hastings, Z. Huang, J. Krzywinski, R. Lindberg, H. Loos, A. Lutman, H.-D. Nuhn, D. Ratner, J. Rzepiela, D. Shu, Yu. Shvyd'ko, S. Spampinati, S. Stoupin, S. Terentyev, E. Trakhtenberg, D. Walz, J. Welch, J. Wu, A. Zholents and D. Zhu doi:10.1038/nphoton.2012.180 Lasing in a hard-X-ray free-electron laser is typically seeded from noise due to the self-amplification of spontaneous emission, which limits temporal coherence and spectral characteristics. Researchers now demonstrate self-seeding using X-rays from the first half of the magnetic undulator to seed the second half via a diamond-based monochromator at ångström wavelengths. See also: News and Views by Yabashi & Tanaka Highly coherent and stable pulses from the FERMI seeded free-electron laser in the extreme ultraviolet   pp699 - 704 E. Allaria, R. Appio, L. Badano, W.A. Barletta, S. Bassanese, S.G. Biedron, A. Borga, E. Busetto, D. Castronovo, P. Cinquegrana, S. Cleva, D. Cocco, M. Cornacchia, P. Craievich, I. Cudin, G. D'Auria, M. Dal Forno, M.B. Danailov, R. De Monte, G. De Ninno, P. Delgiusto, A. Demidovich, S. Di Mitri, B. Diviacco, A. Fabris, R. Fabris, W. Fawley, M. Ferianis, E. Ferrari, S. Ferry, L. Froehlich, P. Furlan, G. Gaio, F. Gelmetti, L. Giannessi, M. Giannini, R. Gobessi, R. Ivanov, E. Karantzoulis, M. Lonza, A. Lutman, B. Mahieu, M. Milloch, S.V. Milton, M. Musardo, I. Nikolov, S. Noe, F. Parmigiani, G. Penco, M. Petronio, L. Pivetta, M. Predonzani, F. Rossi, L. Rumiz, A. Salom, C. Scafuri, C. Serpico, P. Sigalotti, S. Spampinati, C. Spezzani, M. Svandrlik, C. Svetina, S. Tazzari, M. Trovo, R. Umer, A. Vascotto, M. Veronese, R. Visintini, M. Zaccaria, D. Zangrando and M. Zangrando doi:10.1038/nphoton.2012.233 Researchers demonstrate the FERMI free-electron laser operating in the high-gain harmonic generation regime, allowing high stability, transverse and longitudinal coherence and polarization control. Interview Top Spin-wave manipulation   p706 Interview with Takuya Satoh doi:10.1038/nphoton.2012.238 The directional manipulation of spin waves, a long-awaited technique in spintronics, has now been realized by shaping a light pulse. Takuya Satoh from the University of Tokyo talked to Nature Photonics about the technique. Top Advertisement Nature Photonics - New Impact Factor The 2011 ISI impact factor for Nature Photonics is 29.278*, according to the ISI Journal Citation Reports®. This places Nature Photonics as the Number 1 journal in Optics. *2011 Journal Citation Reports® (Thomson Reuters, 2012)   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. For event advertising opportunities across the Nature Publishing Group portfolio please contact natureevents@nature.com More Nature Events

You have been sent this Table of Contents Alert because you have opted in to receive it. You can change or discontinue your e-mail alerts at any time, by modifying your preferences on your nature.com account at: www.nature.com/myaccount (You will need to log in to be recognised as a nature.com registrant) For further technical assistance, please contact our registration department For print subscription enquiries, please contact our subscription department For other enquiries, please contact our customer feedback department Nature Publishing Group | 75 Varick Street, 9th Floor | New York | NY 10013-1917 | USA Nature Publishing Group's worldwide offices: London - Paris - Munich - New Delhi - Tokyo - Melbourne San Diego - San Francisco - Washington - New York - Boston Macmillan Publishers Limited is a company incorporated in England and Wales under company number 785998 and whose registered office is located at Brunel Road, Houndmills, Basingstoke, Hampshire RG21 6XS. © 2012 Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved.