Laser & Photonics Reviews

Cover image for Vol. 9 Issue 5

Early View (Online Version of Record published before inclusion in an issue)

Editor: Katja Paff

Impact Factor: 8.008

ISI Journal Citation Reports © Ranking: 2014: 4/86 (Optics); 10/143 (Physics Applied); 10/67 (Physics Condensed Matter)

Online ISSN: 1863-8899

Associated Title(s): Advanced Optical Materials, Journal of Biophotonics


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  1. Original Papers

    1. Free-space coupling of nanoantennas and whispering-gallery microcavities with narrowed linewidth and enhanced sensitivity

      Fuxing Gu, Li Zhang, Yingbin Zhu and Heping Zeng

      Article first published online: 8 OCT 2015 | DOI: 10.1002/lpor.201500137

      Thumbnail image of graphical abstract

      By using a simple irradiation method, free-space light is efficiently coupled into and from the palladium nanoantenna–microfiber whispering-gallery cavity systems. A measured full width at half-maximum of 3.2 nm at 622.7 nm is obtained, which is the narrowest in palladium nanoparticle-based plasmonic structures reported up to now. Advantages including enhanced sensitivity to hydrogen detection, tunability of resonant wavelengths, and easy fabrication and operation have also been demonstrated.

    2. Ginzburg–Landau turbulence in quasi-CW Raman fiber lasers

      Srikanth Sugavanam, Nikita Tarasov, Stefan Wabnitz and Dmitry V. Churkin

      Article first published online: 6 OCT 2015 | DOI: 10.1002/lpor.201500012

      Thumbnail image of graphical abstract

      Fiber lasers operating via Raman gain or based on rare-earth-doped active fibers are widely used as sources of CW radiation. However, these lasers are only quasi-CW: their intensity fluctuates strongly on short time scales. Here the framework of the complex Ginzburg–Landau equations, which are well known as an efficient model of mode-locked fiber lasers, is applied for the description of quasi-CW fiber lasers. Our results open debates about the common underlying physics of operation of very different laser types – quasi-CW lasers and passively mode-locked lasers.

    3. Chemical-assisted femtosecond laser writing of optical resonator arrays

      Moez Haque and Peter R. Herman

      Article first published online: 29 SEP 2015 | DOI: 10.1002/lpor.201500062

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      Micro-optical resonator arrays are introduced for refractive index sensing, building on the unexplored benefits of open dielectric stacks. Femtosecond laser irradiation with selective chemical etching exploits the self-alignment of nanograting planes to precisely align waveguide-coupled hollow resonators and provide strong spectral resonance bands. Such high finesse optical elements open a new realm of optofluidic and optical circuit concepts with facile integration prospects towards Telecom fiber sensing networks and biomedical probes.

    4. Ultrabroadband superoscillatory lens composed by plasmonic metasurfaces for subdiffraction light focusing

      Dongliang Tang, Changtao Wang, Zeyu Zhao, Yanqin Wang, Mingbo Pu, Xiong Li, Ping Gao and Xiangang Luo

      Article first published online: 24 SEP 2015 | DOI: 10.1002/lpor.201500182

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      Ultrabroadband optical superoscillatory lens and subdiffraction focusing in the far field are proposed and demonstrated with a plasmonic metasurface. The ultrabroadband feature mainly arises from the dispersionless phase profile across visible and near-infrared light wavelengths. This method is believed to provide a promising access to broadband far-field optics beyond the Abbe diffraction limit, such as microscope and telescope systems.

    5. Fundamental limits on the losses of phase and amplitude optical actuators

      Simone Zanotto, Francesco Morichetti and Andrea Melloni

      Article first published online: 21 SEP 2015 | DOI: 10.1002/lpor.201500101

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      To quantify the performance of an optical switching device, an essential aspect is to determine the tradeoff between the insertion loss and the amplitude or phase modulation depth. Here it is shown that every optical switching device is subject to such a tradeoff, intrinsically connected to the dielectric response of the materials employed inside the switching element itself. This limit directly derives from Maxwell's equations for linear dielectrics, and is hence applicable to a wide class of optical components.


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