Laser & Photonics Reviews

Cover image for Vol. 9 Issue 6

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: 4/87 (Optics); 10/144 (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. Measuring and structuring the spatial coherence length of organic light-emitting diodes

      Guohua Xie, Mingzhou Chen, Michael Mazilu, Shuyu Zhang, A.K. Bansal, Kishan Dholakia and Ifor D. W. Samuel

      Article first published online: 26 NOV 2015 | DOI: 10.1002/lpor.201500065

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      The spatial coherence length of light beams from organic light-emitting diodes (OLEDs) is an important feature of their light emission that has been barely studied. A method and optical setup for measuring spatial coherence length using Young's double-slit experiment is reported and applied to a range of OLEDs with different emitters and device architectures. The spatial coherence lengths of planar OLEDs are approaching 2 μm and can be enhanced by integrating external diffractive optical elements.

    2. Tunable generation of entangled photons in a nonlinear directional coupler

      Frank Setzpfandt, Alexander S. Solntsev, James Titchener, Che Wen Wu, Chunle Xiong, Roland Schiek, Thomas Pertsch, Dragomir N. Neshev and Andrey A. Sukhorukov

      Article first published online: 26 NOV 2015 | DOI: 10.1002/lpor.201500216

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      An integrated all-optically tunable source of two-photon quantum states based on spontaneous parametric down-conversion is experimentally demonstrated in a directional coupler consisting of two lithium niobate waveguides. The degree of entanglement and shape of two-photon spatial correlations is widely tunable by varying the phase mismatch and relative phases of the two pump beams. The operating principle is suitable for practical implementation of reconfigurable photon sources in on-chip quantum circuits.

    3. Microcavity-Stabilized Quantum Cascade Laser

      Mario Siciliani de Cumis, Simone Borri, Giacomo Insero, Iacopo Galli, Anatoliy Savchenkov, Danny Eliyahu, Vladimir Ilchenko, Naota Akikusa, Andrey Matsko, Lute Maleki and Paolo De Natale

      Article first published online: 24 NOV 2015 | DOI: 10.1002/lpor.201500214

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      Narrow linewidth lasers are key elements in optical metrology and spectroscopy. While stabilization of visible-to-near-IR lasers benefits of a variety of ultrastable references, its complexity increases tremendously moving to longer wavelenghts. In this paper, mid-IR quantum cascade laser stabilization to high-Q crystalline microresonators is reported, a promising method for mid-infrared metrology and on-chip infrared spectrometers.

  2. Letter Articles

    1. Super-resolution deep imaging with hollow Bessel beam STED microscopy

      Wentao Yu, Ziheng Ji, Dashan Dong, Xusan Yang, Yunfeng Xiao, Qihuang Gong, Peng Xi and Kebin Shi

      Article first published online: 18 NOV 2015 | DOI: 10.1002/lpor.201500151

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      A STED based super resolution deep-imaging modality is reported by utilizing a hollow Bessel beam as depletion and a Gaussian beam as excitation beam. Comparing to the conventional STED microscope, an improvement on lateral resolution at the depth up to ∼150μm inside the specimen is experimentally demonstrated, with ∼100μm depth inside biological phantom. The proposed scheme can find promising applications for deep tissue imaging, laser nano-fabrication, and dense optical storage with super-resolution.

  3. Original Papers

    1. Light on a beam splitter: More randomness with single photons

      Lukas Oberreiter and Ilja Gerhardt

      Article first published online: 18 NOV 2015 | DOI: 10.1002/lpor.201500165

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      One simple source of quantum randomness is implemented with light impinging on a beam splitter: A random bit is generated by the binary outcome on single photon detectors at each output port. With a realistic detector model, accounting for electrical jitter and the detector dead-time, an anti-bunched single photon source is able to produce more true randomness per unit time than an even brighter laser.

    2. Circular dichroism induced by Fano resonances in planar chiral oligomers

      Ben Hopkins, Alexander N. Poddubny, Andrey E. Miroshnichenko and Yuri S. Kivshar

      Article first published online: 16 NOV 2015 | DOI: 10.1002/lpor.201500222

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      The energy imparted by circularly polarized light on chiral matter is known to depend on the handedness of light; an effect known as a circular dichroism. This study reveals that an analogous effect can be realized in two-dimensional, planar chiral, nanostructures through a form of circular dichroism in far-field radiation and near-field material absorption that originates from Fano-like modal interference.


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