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UID:DSC-10030
DTSTART;TZID=Europe/Berlin:20151027T164000
SEQUENCE:1445931854
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20151027T181000
URL:https://dresden-science-calendar.de/calendar/en/detail/10030
LOCATION:TUD\,    
SUMMARY:Taubner: Nanoscale Imaging with 2D materials
CLASS:PUBLIC
DESCRIPTION:Speaker: Prof. Dr. Thomas Taubner\, Institute of Physics (IA)\,
  RWTH Aachen University\nInstitute of Speaker: \nTopics:\nPhysik\n Locatio
 n:\n  Name: TUD (Physikgebäude\, Hörsaal PHY/C213\, Haeckelstr. 3)\n  St
 reet:   \n  City:  \n  Phone: \n  Fax: \nDescription: <p>Near-field superl
 enses [1] have the ability to break the diffraction limit due to the reson
 ance of surface plasmon (or phonon) polaritons (SPPs) and enable applicati
 ons like optical lithography and near-field imaging. Combining a superlens
  with scattering-type-near-field optical microscopy (s-SNOM) enabled subsu
 rface imaging of metallic nanostructures [2].Up to now\, the practical app
 lication of a superlens has been limited by its narrow bandwidth and compl
 icated fabrication. I will show our latest results on two new “superlens
 ing” concepts using natural layered 2D-materials that overcome these lim
 itations\, Graphene and hexagonal boron nitride (hBN): Graphene is a one-
 atom-thick planar sheet supporting surface plasmons at frequencies in the 
 infrared (IR) and terahertz (THz) spectral range. In contrast to conventio
 nal superlenses\, the nonresonant operation of our so-called “Graphene-L
 ens” (GL) [3] provides the advantages of a broad intrinsic bandwidth\, a
  low sensitivity to losses and the possibility for continuously frequency-
 tunable imaging while maintaining a good subwavelength resolution of bette
 r than λ/10. I will present first experimental evidence for graphene supe
 rlensing [4] and our latest subwavelength imaging results using thin layer
 s of hBN\, a material that supports surface phonon polaritons and exhibits
  exciting new subwavelength imaging properties due to its hyperbolic dispe
 rsion [5].</p> <p>1.    J.B. Pendry\, Physical Review Letters <strong>8
 5</strong>\, 3966 (2000).</p> <p>2.    T. Taubner\, et al. Science <st
 rong>313</strong>\, 1595 (2006).</p> <p>3.    P. Li and T. Taubner\, AC
 S Nano<strong>6</strong>\, 10107 (2012).</p> <p>4.    P. Li et al.\, Na
 no Letters\,<strong>14\, </strong>4400-4405 (2014).</p> <p>5.    P. Li 
 et al\, Nature Communications\, <strong>6\,</strong>7507 (2015).</p> <p> 
 </p>
DTSTAMP:20260625T063741Z
CREATED:20151012T135742Z
LAST-MODIFIED:20151027T074414Z
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