TITLE

Experimental observation of subluminal and superluminal light propagation in rhodamine 6G-doped polymethyl methacrylate

AUTHOR(S)
Zhang, Wending; Gao, Feng; Zhang, Guoquan; Li, Wei; Zhang, Xinzheng; Xu, Jingjun
PUB. DATE
October 2009
SOURCE
Applied Physics Letters;10/26/2009, Vol. 95 Issue 17, p171106
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Nondegenerate two-wave coupling process and group velocity change in the paraxial part of an intensity-modulated and focused transverse electromagnetic beam (TEM00 beam in the article) was observed in the rhodamine 6G(R6G)-doped polymethyl methacrylate (PMMA) but not in the pure PMMA. The typical superluminal result was -5.1 m/s and the subluminal result was 9.19 m/s, respectively. Furthermore, the results provide a support to our former conclusion that nondegenerate two-wave couplinglike mechanism could be used to change the group velocity of the paraxial part of a focused TEM00 beam in materials with nondegenerate two-wave coupling process.
ACCESSION #
44909853

 

Related Articles

  • Phase and Group Synchronization in Second-Harmonic Generation of Ultrashort Light Pulses in One-Dimensional Photonic Crystals. Zheltikov, A. M.; Tarasishin, A. V.; Magnitskiı, S. A. // Journal of Experimental & Theoretical Physics;Aug2000, Vol. 91 Issue 2, p298 

    It is shown, on the basis of an analysis of the dispersion relation for an infinite one-dimensional periodic multilayer structure and direct numerical integration of Maxwell's equations by the finite-difference method, that structures with photonic band gaps (PBGs) make it possible to provide...

  • Influence of laser irradiated spot size on energetic electron injection and proton acceleration in foil targets. Coury, M.; Carroll, D. C.; Robinson, A. P. L.; Yuan, X. H.; Brenner, C. M.; Burza, M.; Gray, R. J.; Quinn, M. N.; Lancaster, K. L.; Li, Y. T.; Lin, X. X.; Tresca, O.; Wahlström, C.-G.; Neely, D.; McKenna, P. // Applied Physics Letters;2/13/2012, Vol. 100 Issue 7, p074105 

    The influence of irradiated spot size on laser energy coupling to electrons, and subsequently to protons, in the interaction of intense laser pulses with foil targets is investigated experimentally. Proton acceleration is characterized for laser intensities ranging from 2×1018-6×1020...

  • Time-resolved study of the spectral characteristics of supercontinuum pulses propagating in scattering media. Weigand, R.; Crespo, H.; Dos Santos, A.; Balcou, P. // Applied Physics B: Lasers & Optics;Sep2003, Vol. 77 Issue 2/3, p253 

    Discusses the cross-correlated frequency-resolved optical gating technique to measure the spectral and temporal characteristics of supercontinuum pulses propagating through monodisperse scattering media consisting of sub-lambda-sized particles. Indication that the ballistic component of the...

  • Frequency doubling of multi-terawatt femtosecond pulses. Marcinkeviĉius, A.; Tommasini, R.; Tsakiris, G. D.; Witte, K. J.; Gai&zcirc;auskas, E.; Teubner, U. // Applied Physics B: Lasers & Optics;Sep2004, Vol. 79 Issue 5, p547 

    We present an experimental and theoretical study of the influence of the spatial beam quality (fluence and phase distributions) on the second-harmonic generation in KDP crystals pumped by 180-fs pulses at 790 nm. Conversion efficiency and beam focusability are investigated experimentally and...

  • Multi-wavelength diode-pumped Nd:LGGG picosecond laser. Agnesi, A.; Pirzio, F.; Reali, G.; Arcangeli, A.; Tonelli, M.; Jia, Z.; Tao, X. // Applied Physics B: Lasers & Optics;Apr2010, Vol. 99 Issue 1/2, p135 

    Laser operation near 1.06 μm by a diode-pumped Nd:(Lu xGd1− x)3Ga5O12 (Nd:LGGG) disordered crystal has been investigated. Cw oscillation, with a slope efficiency as high as 61% and 230 mW output power, was achieved with 400 mW absorbed power from a 1-W laser diode. Stable passive mode...

  • Third-order nonlinear optical properties in [(C4H9)4N]2[Cu(C3S5)2]-doped PMMA thin film using Z-scan technique in picosecond pulse. Heliang Fan; Xinqiang Wang; Quan Ren; Tingbin Li; Xian Zhao; Jing Sun; Guanghui Zhang; Dong Xu; Zhihua Sun; Gang Yu // Applied Physics A: Materials Science & Processing;Apr2010, Vol. 99 Issue 1, p279 

    An organometallic complex, [(C4H9)4N]2[Cu(C3S5)2], abbreviated as BuCu, was synthesized. Then the BuCu-doped polymethylmethacrylate (PMMA) thin film with a doping concentration 1% by weight (1 wt.%) was fabricated using a spin-coating method and its third-order nonlinear optical properties were...

  • Picosecond laser micromachining produces high-quality results. Sercel, Jeffrey; Bickley, John; Stearns, Joshua // Laser Focus World;Oct2012, Vol. 48 Issue 10, p57 

    The article focuses on ultrafast lasers, which are used to describe femtosecond and picoseconds lasers in applications where the laser pulse length is shorter. It says that ultrafast laser processing is popular due to its good cosmetic finish and enhanced coupling. It mentions that picoseconds...

  • A new TriBeam system for three-dimensional multimodal materials analysis. Echlin, McLean P.; Mottura, Alessandro; Torbet, Christopher J.; Pollock, Tresa M. // Review of Scientific Instruments;Feb2012, Vol. 83 Issue 2, p023701 

    The unique capabilities of ultrashort pulse femtosecond lasers have been integrated with a focused ion beam (FIB) platform to create a new system for rapid 3D materials analysis. The femtosecond laser allows for in situ layer-by-layer material ablation with high material removal rates. The high...

  • Broadening compensation for ultrashort pulses in photonic crystals. García, J.; Martínez, A.; Cuesta-Soto, F.; Sanchis, P.; Blasco, J.; Martí, J. // Optical & Quantum Electronics;Jan2005, Vol. 37 Issue 1-3, p199 

    Extremely large group velocity dispersion of both signs can be achieved at the band edges of guided modes in photonic crystal waveguides. The selection of a proper value and sign of this parameter allows the design of short-length waveguides to compensate for pulse broadening. This pulse...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics