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Title: Large Transient Optical Modulation of Epsilon-Near-Zero Colloidal Nanocrystals

Journal Article · · ACS Nano
 [1];  [2];  [2];  [3]
  1. Argonne National Lab. (ANL), Lemont, IL (United States)
  2. Northwestern Univ., Evanston, IL (United States)
  3. Argonne National Lab. (ANL), Lemont, IL (United States); Northwestern Univ., Evanston, IL (United States)

Here, epsilon-near-zero materials may be synthesized as colloidal nanocrystals which display large magnitude subpicosecond switching of infrared localized surface plasmon resonances. Such nanocrystals offer a solution-processable, scalable source of tunable metamaterials compatible with arbitrary substrates. Under intraband excitation, these nanocrystals display a red-shift of the plasmon feature arising from the low electron heat capacities and conduction band nonparabolicity of the oxide. Under interband pumping, they show in an ultrafast blueshift of the plasmon resonance due to transient increases in the carrier density. Combined with their high-quality factor, large changes in relative transmittance (+86%) and index of refraction (+85%) at modest control fluences (<5 mJ/cm2) suggest that these materials offer great promise for all-optical switching, wavefront engineering, and beam steering operating at terahertz switching frequencies.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
Northwestern University, Materials Research Science and Engineering Center (NU-MRSEC); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1416152
Journal Information:
ACS Nano, Vol. 10, Issue 11; ISSN 1936-0851
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 41 works
Citation information provided by
Web of Science

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Ultrafast saturable absorption in TiS 2 induced by non-equilibrium electrons and the generation of a femtosecond mode-locked laser journal January 2018
Epsilon-Near-Zero Photonics: A New Platform for Integrated Devices journal March 2018
Plasmon-induced hot electron transfer in AgNW@TiO2@AuNPs nanostructures journal September 2018
Suppression of near-field coupling in plasmonic antennas on epsilon-near-zero substrates journal January 2018
An Ultrabroadband Mid-Infrared Pulsed Optical Switch Employing Solution-Processed Bismuth Oxyselenide journal June 2018
Ultrafast and large optical nonlinearity of a TiSe 2 saturable absorber in the 2 μm wavelength region journal January 2019
Near infrared light induced plasmonic hot hole transfer at a nano-heterointerface journal June 2018
Heating and cooling of ligand-coated colloidal nanocrystals in solid films and solvent matrices journal January 2019
Ultrafast and broadband optical nonlinearity in aluminum doped zinc oxide colloidal nanocrystals journal January 2019
Tailorable Dynamics in Nonlinear Optical Metasurfaces journal June 2019
Solution processable and optically switchable 1D photonic structures journal February 2018
Solution processable and optically switchable 1D photonic structures text January 2018