TITLE

Generation of multicycle terahertz phonon-polariton waves in a planar waveguide by tilted optical pulse fronts

AUTHOR(S)
Kung-Hsuan Lin; Werley, Christopher A.; Nelson, Keith A.
PUB. DATE
September 2009
SOURCE
Applied Physics Letters;9/7/2009, Vol. 95 Issue 10, p103304
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We demonstrate generation of frequency-tunable, multicycle terahertz phonon-polariton waves in a LiNbO3 slab waveguide. Because the waveguide modes show considerable phase-velocity dispersion, we are able to enhance frequency-selected narrowband terahertz waves by using femtosecond optical pulses whose intensity fronts are tilted at angles that meet the appropriate noncollinear phase-matching conditions. The pump light is spread across a large area of the crystalline waveguide within which coherent terahertz wave generation occurs, averting material damage, while yielding peak-to-peak terahertz field amplitudes in the waveguide of 50 kV/cm.
ACCESSION #
44150709

 

Related Articles

  • Excitation of terahertz surface polaritons in a cylindrical waveguide by femtosecond laser pulses. Malevich, V.; Sinitsyn, G.; Rosanov, N. // Optics & Spectroscopy;Aug2014, Vol. 117 Issue 2, p264 

    Generation of terahertz surface polaritons in homogeneous round cross-section plasma waveguides upon nonlinear optical rectification of femtosecond laser pulses is analyzed theoretically. It is assumed that nonlinear polarization inducing a surface electromagnetic wave is formed at the waveguide...

  • Femtosecond laser induced tunable surface transformations on (111) Si aided by square grids diffraction. Weina Han; Lan Jiang; Xiaowei Li; Yang Liu; Yongfeng Lu // Applied Physics Letters;12/21/2015, Vol. 107 Issue 25, p1 

    We report an extra freedom to modulate the femtosecond laser energy distribution to control the surfaceablatedstructures through a copper-grid mask. Due to the reduced deposited pulse energy by changing the scanning speed or the pulse fluence, a sequential evolution of three distinctly different...

  • Integrated microchips for biological analysis fabricated by femtosecond laser direct writing. Sugioka, Koji; Cheng, Ya // MRS Bulletin;Dec2011, Vol. 36 Issue 12, p1020 

    Microchips have revolutionized biological analysis since they can be used to perform biochemical analysis with high efficiency and accuracy. Femtosecond laser direct writing followed by wet chemical etching can be used to fabricate hollow microstructures with almost any three-dimensional (3D)...

  • Fabrication of hollow optical waveguides in fused silica by three-dimensional femtosecond laser micromachining. He, F.; Lin, J.; Cheng, Y. // Applied Physics B: Lasers & Optics;Nov2011, Vol. 105 Issue 2, p379 

    We report on the fabrication of hollow optical waveguides in fused silica using femtosecond laser micromachining. We show that in such hollow waveguides, high-intensity femtosecond laser beams can be guided with low optical loss. Our technique, which was established earlier for fabrication of...

  • Photonics: Trapped in a flat dispersion. Maragkou, Maria // Nature Materials;Aug2015, Vol. 14 Issue 8, p759 

    The article provides first experimental observation of diffraction-free propagation of a flatband state in a Lieb photonic lattice. Topics include Anderson localization describing the confinement of waves in disordered media, research works in prevention of the diffusion of light and the...

  • Control of waveguide properties by tuning femtosecond laser induced compositional changes. Hoyo, Jesús del; Vazquez, Rebeca Martinez; Sotillo, Belén; Fernandez, Toney Teddy; Siegel, Jan; Fernéndez, Paloma; Osellame, Roberto; Solis, Javier // Applied Physics Letters;9/29/2014, Vol. 105 Issue 13, p1 

    Local compositional changes induced by high repetition rate fs-laser irradiation can be used to produce high performance optical waveguides in phosphate-based glasses. The waveguide refractive index contrast is determined by the local concentration of La, which can be changed by the action of...

  • On-chip plasmonic waveguide optical waveplate. Gao, Linfei; Huo, Yijie; Zang, Kai; Paik, Seonghyun; Chen, Yusi; Harris, James S.; Zhou, Zhiping // Scientific Reports;10/30/2015, p15794 

    Polarization manipulation is essential in almost every photonic system ranging from telecommunications to bio-sensing to quantum information. This is traditionally achieved using bulk waveplates. With the developing trend of photonic systems towards integration and miniaturization, the need for...

  • Optical gain seen in plasmonic waveguides.  // Laser Focus World;Jul2010, Vol. 46 Issue 7, p11 

    The article reports that researchers at the University of Iceland, the Harvard Medical School, and the Fraunhofer Institute for Applied Optics and Precision Engineering have collaborated in the propagation of surface-plasmon polaritons (SPPs) with optical gain over macroscopic distances.

  • Photoelectron emission control with polarized light in plasmonic metal random structures. Word, R. C.; Fitzgerald, J.; Könenkamp, R. // Applied Physics Letters;7/25/2011, Vol. 99 Issue 4, p041106 

    We report on the possibility of switching the emission rate of photoelectrons by polarization changes in the plasmon excitation light. Photoelectron emission is strongly enhanced in the near-field of localized surface plasmons and occurs from areas with typical diameters of 20-70 nm. The...

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