Generation of Terahertz Surface Plasmon Polaritons Using Nondiffractive Bessel Beams with Orbital Angular Momentum.

Bessel vortex beams with topological charges of l=±1 and l=±2 were produced in the terahertz spectral range from a free electron laser Gaussian beam (λ=141  μm) transformed using silicon binary diffractive optical elements. The spatial characteristics of the beams were obtained using a microbolometer array. A radius to path length ratio of 1:100 was achieved for nondiffractive beams with the average power of 30 W. Surface plasmon polaritons (SPPs) on gold-zinc-sulphide-air interfaces were generated due to diffraction of vortex beams on a sample edge. A new effect, a dependence of the efficiency of SPP generation on the direction of the azimuthal component of incident-radiation Poynting vector, was revealed.

[1]  A. Hayrapetyan,et al.  Atomic ionization of hydrogen-like ions by twisted photons: angular distribution of emitted electrons , 2013, 1306.3878.

[2]  李基炯,et al.  § 14 , 1982, Fichte.

[3]  W. Barnes,et al.  Surface plasmon subwavelength optics , 2003, Nature.

[4]  Nikolay A. Vinokurov,et al.  Novosibirsk terahertz free electron laser: instrumentation development and experimental achievements , 2010 .

[5]  Andrew G. Glen,et al.  APPL , 2001 .

[6]  Yaroslav V. Getmanov,et al.  Novosibirsk Free Electron Laser—Facility Description and Recent Experiments , 2015, IEEE Transactions on Terahertz Science and Technology.

[7]  Daniel M. Mittleman,et al.  Frontiers in terahertz sources and plasmonics , 2013, Nature Photonics.

[8]  G. N. Kulipanov,et al.  Imaging with a 90 frames/s microbolometer focal plane array and high-power terahertz free electron laser , 2008 .

[9]  Mikhail V. Vasnetsov,et al.  Screw Dislocations in Light Wavefronts , 1992 .

[10]  Byoungho Lee,et al.  Synthesis and dynamic switching of surface plasmon vortices with plasmonic vortex lens. , 2010, Nano letters.

[11]  M. Padgett,et al.  Orbital angular momentum: origins, behavior and applications , 2011 .

[12]  I. V. Marchishin,et al.  Application of uncooled microbolometer detector arrays for recording radiation of the terahertz spectral range , 2011 .

[13]  Andrew G. White,et al.  Generation of optical phase singularities by computer-generated holograms. , 1992, Optics letters.

[14]  R. Skidanov,et al.  Asymmetric Bessel-Gauss beams. , 2014, Journal of the Optical Society of America. A, Optics, image science, and vision.

[15]  R R Alfano,et al.  Double-slit interference with Laguerre-Gaussian beams. , 2006, Optics letters.

[16]  A. K. Nikitin,et al.  Surface plasmon polaritons launched using a terahertz free-electron laser: propagation along a gold–ZnS–air interface and decoupling to free waves at the surface edge , 2013 .

[17]  P S Tan,et al.  Phase singularity of surface plasmon polaritons generated by optical vortices. , 2011, Optics letters.

[18]  Qiang Kan,et al.  Generation and evolution of the terahertz vortex beam. , 2013, Optics express.

[19]  Federico Capasso,et al.  Holographic detection of the orbital angular momentum of light with plasmonic photodiodes , 2012, Nature Communications.

[20]  A. Forbes,et al.  Shape invariant higher-order Bessel-like beams carrying orbital angular momentum , 2012 .

[21]  Generation of broadband terahertz vortex beams. , 2014, Optics letters.

[22]  S. Maier.  Plasmonics: Fundamentals and Applications , 2007 .

[23]  M. Babiker,et al.  Surface optical vortices , 2009 .

[24]  B. Knyazev,et al.  Optical elements for focusing of terahertz laser radiation in a given two-dimensional domain , 2014, Optical Memory and Neural Networks.

[25]  Zach DeVito,et al.  Opt , 2017 .

[26]  Lukas Novotny,et al.  Principles of Nano-Optics by Lukas Novotny , 2006 .

[27]  O. Emile,et al.  Young’s double-slit interference pattern from a twisted beam , 2013, 1310.2444.

[28]  B. Hecht,et al.  Principles of nano-optics , 2006 .

[29]  Lin Zhu,et al.  Efficient end-fire coupling of surface plasmons on flat metal surfaces for improved plasmonic Mach-Zehnder interferometer , 2013 .

[30]  Koji Suizu,et al.  Direct observation of the topological charge of a terahertz vortex beam generated by a Tsurupica spiral phase plate , 2014 .

[31]  N. Yu,et al.  Flat optics with designer metasurfaces. , 2014, Nature materials.

[32]  J. P. Woerdman,et al.  Orbital angular momentum of light and the transformation of Laguerre-Gaussian laser modes. , 1992, Physical review. A, Atomic, molecular, and optical physics.

[33]  B. Knyazev,et al.  Diffraction of a surface wave on a conducting rectangular wedge , 2013, 1301.3715.

[34]  Anatoly V. Zayats,et al.  Near-field photonics: surface plasmon polaritons and localized surface plasmons , 2003 .