Abstract
This Letter reports the shape-dependent third-order nonlinear optical properties of anisotropic gold nanoparticles. We characterized the nonlinear absorption coefficients of nanorods, nanostars, and nanoshells using femtosecond Z-scan measurements. By comparing nanoparticle solutions with a similar linear extinction at the laser excitation wavelength, we separated shape effects from that of the localized surface plasmon wavelength. We found that the nonlinear response depended on particle shape. Using pump-probe spectroscopy, we measured the ultrafast transient response of nanoparticles, which supported the strong saturable absorption observed in nanorods and weak nonlinear response in nanoshells. We found that the magnitude of saturable absorption as well as the ultrafast spectral responses of nanoparticles were affected by the linear absorption of the nanoparticles.
| Original language | English |
|---|---|
| Pages (from-to) | 4904-4908 |
| Number of pages | 5 |
| Journal | Journal of Physical Chemistry Letters |
| Volume | 6 |
| Issue number | 24 |
| DOIs | |
| Publication status | Published - Nov 23 2015 |
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Keywords
- anisotropic metal nanoparticles
- gold nanostars
- hot electrons
- nonlinear
- saturable absorption
- Z-scan
ASJC Scopus subject areas
- Materials Science(all)
Cite this
Shape-Dependent Nonlinear Optical Properties of Anisotropic Gold Nanoparticles. / Hua, Yi; Chandra, Kavita; Dam, Duncan Hieu M; Wiederrecht, Gary P.; Odom, Teri W.
In: Journal of Physical Chemistry Letters, Vol. 6, No. 24, 23.11.2015, p. 4904-4908.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Shape-Dependent Nonlinear Optical Properties of Anisotropic Gold Nanoparticles
AU - Hua, Yi
AU - Chandra, Kavita
AU - Dam, Duncan Hieu M
AU - Wiederrecht, Gary P.
AU - Odom, Teri W
PY - 2015/11/23
Y1 - 2015/11/23
N2 - This Letter reports the shape-dependent third-order nonlinear optical properties of anisotropic gold nanoparticles. We characterized the nonlinear absorption coefficients of nanorods, nanostars, and nanoshells using femtosecond Z-scan measurements. By comparing nanoparticle solutions with a similar linear extinction at the laser excitation wavelength, we separated shape effects from that of the localized surface plasmon wavelength. We found that the nonlinear response depended on particle shape. Using pump-probe spectroscopy, we measured the ultrafast transient response of nanoparticles, which supported the strong saturable absorption observed in nanorods and weak nonlinear response in nanoshells. We found that the magnitude of saturable absorption as well as the ultrafast spectral responses of nanoparticles were affected by the linear absorption of the nanoparticles.
AB - This Letter reports the shape-dependent third-order nonlinear optical properties of anisotropic gold nanoparticles. We characterized the nonlinear absorption coefficients of nanorods, nanostars, and nanoshells using femtosecond Z-scan measurements. By comparing nanoparticle solutions with a similar linear extinction at the laser excitation wavelength, we separated shape effects from that of the localized surface plasmon wavelength. We found that the nonlinear response depended on particle shape. Using pump-probe spectroscopy, we measured the ultrafast transient response of nanoparticles, which supported the strong saturable absorption observed in nanorods and weak nonlinear response in nanoshells. We found that the magnitude of saturable absorption as well as the ultrafast spectral responses of nanoparticles were affected by the linear absorption of the nanoparticles.
KW - anisotropic metal nanoparticles
KW - gold nanostars
KW - hot electrons
KW - nonlinear
KW - saturable absorption
KW - Z-scan
UR - http://www.scopus.com/inward/record.url?scp=84952033881&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84952033881&partnerID=8YFLogxK
U2 - 10.1021/acs.jpclett.5b02263
DO - 10.1021/acs.jpclett.5b02263
M3 - Article
VL - 6
SP - 4904
EP - 4908
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
SN - 1948-7185
IS - 24
ER -