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TABLE OF CONTENTS
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November 2013 Volume 7, Issue 11 |
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Editorial
Commentary
Interviews
Research Highlights
News and Views
Reviews
Letters
Articles
Interview
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Editorial |
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Fibre laser focus p841 doi:10.1038/nphoton.2013.292 With their ultrafast and high-power characteristics, fibre lasers are penetrating conventional laser markets as well as opening up exciting new opportunities.
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Commentary |
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Nanotube and graphene saturable absorbers for fibre lasers pp842 - 845 Amos Martinez and Zhipei Sun doi:10.1038/nphoton.2013.304 Nanotubes and graphene have emerged as promising materials for use in ultrafast fibre lasers. Their unique electrical and optical properties enable them to be used as saturable absorbers that have fast responses and broadband operation and that can be easily integrated in fibre lasers.
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Interviews |
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Fibre laser directions pp846 - 847 Interview with Anatoly Grudinin doi:10.1038/nphoton.2013.306 Nature Photonics spoke to Anatoly Grudinin, founder of the fibre laser company Fianium, to gain insight into the vicissitudes in the industry over the past decade and future challenges that academia can help solve.
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Research Highlights |
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Materials: Smart glass | Biophotonics: Gene expression control | Plasmonics: Nonlocality simplified | Optical clocks: Record stability | Reciprocity: Magnets not needed | Liquid crystals: Nanosecond switching | Superluminescent diodes: High-optical power | Medical diagnostics: Urine testing app | Optical beams: Vortex manipulation | Optical manipulation: Metasurface spin effect |
News and Views |
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Reviews |
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High-power fibre lasers pp861 - 867 Cesar Jauregui, Jens Limpert and Andreas Tunnermann doi:10.1038/nphoton.2013.273 High-power fibre lasers are in demand for industrial, defence and scientific applications. This review provides an overview of the present state of the art in the field and discusses present challenges and the future outlook.
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Ultrafast fibre lasers pp868 - 874 Martin E. Fermann and Ingmar Hartl doi:10.1038/nphoton.2013.280 Ultrafast fibre lasers are an important optical system with industrial, medical and purely scientific applications. Essential components and the operation regimes of ultrafast fibre laser systems are reviewed, as are their use in various applications.
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Recent advances in fibre lasers for nonlinear microscopy pp875 - 882 C. Xu and F. W. Wise doi:10.1038/nphoton.2013.284 This Review discusses recent advances, and identifies challenges and opportunities regarding the use of fibre lasers in nonlinear bioimaging.
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Letters |
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Chip-integrated ultrafast graphene photodetector with high responsivity pp883 - 887 Xuetao Gan, Ren-Jye Shiue, Yuanda Gao, Inanc Meric, Tony F. Heinz, Kenneth Shepard, James Hone, Solomon Assefa & Dirk Englund doi:10.1038/nphoton.2013.253 A chip-integrated graphene photodetector with a high responsivity of over 0.1 A W-1, high speed and broad spectral bandwidth is realized through enhanced absorption due to near-field coupling. Under zero-bias operation, response rates above 20 GHz and an instrumentation-limited 12 Gbit s-1 optical data link are demonstrated.
See also: News and Views by Liu & Zhang |
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High-responsivity graphene/silicon-heterostructure waveguide photodetectors pp888 - 891 Xiaomu Wang, Zhenzhou Cheng, Ke Xu, Hon Ki Tsang and Jian-Bin Xu doi:10.1038/nphoton.2013.241 A CMOS-compatible graphene/silicon-heterostructure photodetector formed by integrating graphene onto a silicon optical waveguide on silicon-on-insulator and operating in the near- and mid-infrared regions is demonstrated. A responsivity as high as 0.13 A W-1 is obtained at a bias of 1.5 V for 2.75-[mu]m light at room temperature.
See also: News and Views by Liu & Zhang |
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CMOS-compatible graphene photodetector covering all optical communication bands pp892 - 896 Andreas Pospischil, Markus Humer, Marco M. Furchi, Dominic Bachmann, Romain Guider, Thomas Fromherz & Thomas Mueller doi:10.1038/nphoton.2013.240 A CMOS-compatible photodetector based on graphene with multi-gigahertz operation ranging from the O- to U-band of telecommunication bands is demonstrated, highlighting the promise of graphene as a new material for integrated photonics.
See also: News and Views by Liu & Zhang |
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Nonlinear laser lithography for indefinitely large-area nanostructuring with femtosecond pulses pp897 - 901 Bülent Öktem, Ihor Pavlov, Serim Ilday, Hamit Kalaycıoğlu, Andrey Rybak, Seydi Yavaş, Mutlu Erdoğan & F. Ömer Ilday doi:10.1038/nphoton.2013.272 A simple, rapid and inexpensive nanolithography technique is demonstrated that exploits nonlinear feedback mechanisms to tightly regulate the formation of nanostructures induced by femtosecond laser pulses. The nonlocal nature of the feedback allows the nanostructures to be seamlessly stitched, resulting in large-area nanostructuring whose periodicity is uniform on a subnanometre scale.
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Articles |
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Trapping light by mimicking gravitational lensing pp902 - 906 C. Sheng, H. Liu, Y. Wang, S. N. Zhu and D. A. Genov doi:10.1038/nphoton.2013.247 By utilizing a microstructured optical waveguide around a microsphere, an optical anlogue of the effects of gravity on the motion of light rays is demonstrated. Both far-field gravitational-lensing effects and the critical phenomenon that occurs close to the photon sphere of astrophysical objects under hydrostatic equilibrium are experimentally demonstrated.
See also: News and Views by Leonhardt |
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Experimental realization of an epsilon-near-zero metamaterial at visible wavelengths pp907 - 912 Ruben Maas, James Parsons, Nader Engheta and Albert Polman doi:10.1038/nphoton.2013.256 Silver and silicon nitride metamaterial structures with dielectric permittivities close to zero are demonstrated at visible wavelengths. In such materials, the optical phase advance during propagation can be very small.
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Two-stage seeded soft-X-ray free-electron laser pp913 - 918 E. Allaria, D. Castronovo, P. Cinquegrana, P. Craievich, M. Dal Forno, M. B. Danailov, G. D'Auria, A. Demidovich, G. De Ninno, S. Di Mitri, B. Diviacco, W. M. Fawley, M. Ferianis, E. Ferrari, L. Froehlich, G. Gaio, D. Gauthier, L. Giannessi, R. Ivanov, B. Mahieu, N. Mahne, I. Nikolov, F. Parmigiani, G. Penco, L. Raimondi, C. Scafuri, C. Serpico, P. Sigalotti, S. Spampinati, C. Spezzani, M. Svandrlik, C. Svetina, M. Trovo, M. Veronese, D. Zangrando & M. Zangrando doi:10.1038/nphoton.2013.277 A seeded free-electron laser with a two-stage harmonic upshift configuration provided tunable and coherent soft-X-ray pulses. The configuration produced single-transverse-mode, narrow-spectral-bandwidth femtosecond pulses with energies of several tens of microjoules and a low pulse-to-pulse wavelength jitter at wavelengths of 10.8 nm and below.
See also: News and Views by Hara |
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Real-time wavefront shaping through scattering media by all-optical feedback pp919 - 924 Micha Nixon, Ori Katz, Eran Small, Yaron Bromberg, Asher A. Friesem, Yaron Silberberg & Nir Davidson doi:10.1038/nphoton.2013.248 The self-organization of many laser modes in phase and frequency realized by minimizing radiation losses in a cavity enables the complex wavefront required to focus light scattered by turbid samples to be generated on sub-microsecond timescales without employing electronic feedback, spatial light modulators or phase-conjugation crystals.
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Induced transparency by coupling of Tamm and defect states in tunable terahertz plasmonic crystals pp925 - 930 Gregory C. Dyer, Gregory R. Aizin, S. James Allen, Albert D. Grine, Don Bethke, John L. Reno & Eric A. Shaner doi:10.1038/nphoton.2013.252 Tamm states on subwavelength, reconfigurable plasmonic crystals are studied in the terahertz regime. By introducing an independently controlled plasmonic defect, an electromagnetically induced transparency phenomenon is revealed.
See also: Interview with Eric Shaner |
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Tamm states in electron plasma p932 Interview with Eric Shaner doi:10.1038/nphoton.2013.291 Researchers have fabricated a voltage-tunable plasmonic crystal in a two-dimensional electron gas that operates at terahertz frequencies. Nature Photonics spoke to Eric Shaner, Greg Dyer and Greg Aizin about the observation of Tamm states at the crystal's edge.
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