Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 10099-10105 |
| Number of pages | 7 |
| Journal | ACS Nano |
| Volume | 10 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Nov 22 2016 |
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Keywords
- doping
- epsilon-near-zero
- localized surface plasmon resonance
- nanocrystals
- ultrafast
ASJC Scopus subject areas
- Materials Science(all)
- Engineering(all)
- Physics and Astronomy(all)
Cite this
Large Transient Optical Modulation of Epsilon-Near-Zero Colloidal Nanocrystals. / Diroll, Benjamin T.; Guo, Peijun; Chang, Robert P. H.; Schaller, Richard D.
In: ACS Nano, Vol. 10, No. 11, 22.11.2016, p. 10099-10105.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Large Transient Optical Modulation of Epsilon-Near-Zero Colloidal Nanocrystals
AU - Diroll, Benjamin T.
AU - Guo, Peijun
AU - Chang, Robert P. H.
AU - Schaller, Richard D
PY - 2016/11/22
Y1 - 2016/11/22
N2 - 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.
AB - 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.
KW - doping
KW - epsilon-near-zero
KW - localized surface plasmon resonance
KW - nanocrystals
KW - ultrafast
UR - http://www.scopus.com/inward/record.url?scp=84997161391&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84997161391&partnerID=8YFLogxK
U2 - 10.1021/acsnano.6b05116
DO - 10.1021/acsnano.6b05116
M3 - Article
VL - 10
SP - 10099
EP - 10105
JO - ACS Nano
JF - ACS Nano
SN - 1936-0851
IS - 11
ER -