BROWSE

Related Researcher

Author's Photo

Lee, Jongwon
Nanostructured Photonic Devices Lab (NPDL)
Research Interests
  • Plasmonics, metasurfaces, metamaterials, surface-enhanced infrared absorption spectroscopy, orbital angular momentum generation

ITEM VIEW & DOWNLOAD

Ultrafast Electrically Tunable Polaritonic Metasurfaces

Cited 6 times inthomson ciCited 5 times inthomson ci
Title
Ultrafast Electrically Tunable Polaritonic Metasurfaces
Author
Lee, JongwonJung, SeungyongChen, Pai‐YenLu, FengDemmerle, FredericBoehm, GerhardAmann, Markus‐ChristianAlù, AndreaBelkin, Mikhail A.
Keywords
INTERSUBBAND TRANSITIONS; QUANTUM-WELLS; METAMATERIAL DEVICES; PHASE MODULATORS; STARK SHIFTS; GRAPHENE; ANTENNAS; metasurfaces; metamaterials; plasmonics; intersubband polaritons; modulators
Issue Date
2014-11
Publisher
Wiley-VCH
Citation
ADVANCED OPTICAL MATERIALS, v.2, no.11, pp.1057 - 1063
Abstract
Electrically tunable mid-infrared metasurfaces with nanosecond response time and broad tuning range are reported. Electrical tuning is achieved by employing strong polaritonic coupling of electromagnetic modes in metallic nanoresonators with voltage-tunable inter-subband transitions in semiconductor heterostructures, tailored for a giant quantum-confined Stark effect. Experimentally, a 220-nm-thick multi-quantum-well semiconductor layer is sandwiched between a ground plane and a metal layer patterned with plasmonic nanoresonators. Approximately 300 nm absorption peak tuning and over 30% absorption change are demonstrated at around 7 m wavelength at normal incidence by changing the DC bias voltage from 0 to +5 V. Fast reflectivity modulation of the metasurface is shown with a response time less than approximate to 10 ns using bias voltage modulation between +2 V and +4 V. Since the bias affects the optical response at the individual nanoresonator level, this approach may be used to create metasurfaces for ultrafast electrical wavefront tuning and beam steering.
URI
Go to Link
DOI
10.1002/adom.201400185
ISSN
2195-1071
Appears in Collections:
EE_Journal Papers
Files in This Item:
Lee_et_al_AOM_2014.pdf Download

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU