Abstract
| Original language | Undefined |
|---|---|
| Pages (from-to) | 3349-3357 |
| Number of pages | 9 |
| Journal | Physical chemistry chemical physics |
| Volume | 8 |
| Issue number | 28 |
| DOIs | |
| Publication status | Published - 2006 |
Keywords
- IR-74318
- METIS-232775
Cite this
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Shape and size effects in the optical properties of metallic nanorod. / Kooij, Ernst S.; Poelsema, Bene.
In: Physical chemistry chemical physics, Vol. 8, No. 28, 2006, p. 3349-3357.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Shape and size effects in the optical properties of metallic nanorod
AU - Kooij, Ernst S.
AU - Poelsema, Bene
PY - 2006
Y1 - 2006
N2 - The influence of size and geometrical shape on the optical properties of randomly oriented metallic nanorods is investigated using the discrete dipole approximation (DDA). Our calculations provide a benchmark for an accurate characterisation of nanorod suspensions by frequently used optical spectroscopic techniques. Our DDA results confirm the longitudinal plasmon resonance to be primarily affected by the nanorod aspect ratio, and also verify that the quasi-static (dipole) approximation for ellipsoidal particles is only valid for very small sizes. For prolate ellipsoidal and cylindrical nanorods with an identical aspect ratio, the latter exhibit a longitudinal resonance at significantly longer wavelengths. The importance of phase retardation and multipole contributions for larger nanorod dimensions is discussed. Also, we investigate the influence on the optical spectra of electron surface scattering, which arises from the limited size of the nanorods in comparison to the electron mean free path.
AB - The influence of size and geometrical shape on the optical properties of randomly oriented metallic nanorods is investigated using the discrete dipole approximation (DDA). Our calculations provide a benchmark for an accurate characterisation of nanorod suspensions by frequently used optical spectroscopic techniques. Our DDA results confirm the longitudinal plasmon resonance to be primarily affected by the nanorod aspect ratio, and also verify that the quasi-static (dipole) approximation for ellipsoidal particles is only valid for very small sizes. For prolate ellipsoidal and cylindrical nanorods with an identical aspect ratio, the latter exhibit a longitudinal resonance at significantly longer wavelengths. The importance of phase retardation and multipole contributions for larger nanorod dimensions is discussed. Also, we investigate the influence on the optical spectra of electron surface scattering, which arises from the limited size of the nanorods in comparison to the electron mean free path.
KW - IR-74318
KW - METIS-232775
U2 - 10.1039/B518389H
DO - 10.1039/B518389H
M3 - Article
VL - 8
SP - 3349
EP - 3357
JO - Physical chemistry chemical physics
JF - Physical chemistry chemical physics
SN - 1463-9076
IS - 28
ER -