Ultrafast optical mapping of nonlinear plasmon dynamics in Cu 2-xSe nanoparticles

Giuseppe Della Valle; Francesco Scotognella; Ajay Ram Srimath Kandada; Margherita Zavelani-Rossi; Hongbo Li; Matteo Conforti; Stefano Longhi; Liberato Manna; Guglielmo Lanzani; Francesco Tassone

doi:10.1021/jz401862v

Ultrafast optical mapping of nonlinear plasmon dynamics in Cu _2-xSe nanoparticles

Giuseppe Della Valle^*
, Francesco Scotognella
, Ajay Ram Srimath Kandada
, Margherita Zavelani-Rossi
, Hongbo Li
, Matteo Conforti
, Stefano Longhi
, Liberato Manna
, Guglielmo Lanzani
, Francesco Tassone

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

52 Citations (Scopus)

Abstract

We report on the experimental investigation and theoretical modeling of the ultrafast nonlinear optical response exhibited by Cu_2-xSe nanoparticles in a broad range of wavelengths, from the red to the near-infrared, under excitation with intense femtosecond-laser pulses. The ultrafast dynamics of the localized plasmon resonance of the system is mapped by pump-probe differential transmission measurements. Deviations from theoretical predictions based on standard two-temperature model (TTM) are revealed in the subpicosecond time-scale where the nonlinear phenomenon is more pronounced. The key-role played by nonthermalized carriers is investigated in detail on the basis of an extended TTM.

Original language	English
Pages (from-to)	3337-3344
Number of pages	8
Journal	Journal of Physical Chemistry Letters
Volume	4
Issue number	19
DOIs	https://doi.org/10.1021/jz401862v
Publication status	Published - 3 Oct 2013
Externally published	Yes

Keywords

heavily doped semiconductors
nanocrystals
nonthermalized carriers
plasmonics
pump-probe spectroscopy
two temperature model

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10.1021/jz401862v

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title = "Ultrafast optical mapping of nonlinear plasmon dynamics in Cu 2-xSe nanoparticles",

abstract = "We report on the experimental investigation and theoretical modeling of the ultrafast nonlinear optical response exhibited by Cu2-xSe nanoparticles in a broad range of wavelengths, from the red to the near-infrared, under excitation with intense femtosecond-laser pulses. The ultrafast dynamics of the localized plasmon resonance of the system is mapped by pump-probe differential transmission measurements. Deviations from theoretical predictions based on standard two-temperature model (TTM) are revealed in the subpicosecond time-scale where the nonlinear phenomenon is more pronounced. The key-role played by nonthermalized carriers is investigated in detail on the basis of an extended TTM.",

keywords = "heavily doped semiconductors, nanocrystals, nonthermalized carriers, plasmonics, pump-probe spectroscopy, two temperature model",

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doi = "10.1021/jz401862v",

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T1 - Ultrafast optical mapping of nonlinear plasmon dynamics in Cu 2-xSe nanoparticles

AU - Della Valle, Giuseppe

AU - Scotognella, Francesco

AU - Kandada, Ajay Ram Srimath

AU - Zavelani-Rossi, Margherita

AU - Li, Hongbo

AU - Conforti, Matteo

AU - Longhi, Stefano

AU - Manna, Liberato

AU - Lanzani, Guglielmo

AU - Tassone, Francesco

PY - 2013/10/3

Y1 - 2013/10/3

N2 - We report on the experimental investigation and theoretical modeling of the ultrafast nonlinear optical response exhibited by Cu2-xSe nanoparticles in a broad range of wavelengths, from the red to the near-infrared, under excitation with intense femtosecond-laser pulses. The ultrafast dynamics of the localized plasmon resonance of the system is mapped by pump-probe differential transmission measurements. Deviations from theoretical predictions based on standard two-temperature model (TTM) are revealed in the subpicosecond time-scale where the nonlinear phenomenon is more pronounced. The key-role played by nonthermalized carriers is investigated in detail on the basis of an extended TTM.

AB - We report on the experimental investigation and theoretical modeling of the ultrafast nonlinear optical response exhibited by Cu2-xSe nanoparticles in a broad range of wavelengths, from the red to the near-infrared, under excitation with intense femtosecond-laser pulses. The ultrafast dynamics of the localized plasmon resonance of the system is mapped by pump-probe differential transmission measurements. Deviations from theoretical predictions based on standard two-temperature model (TTM) are revealed in the subpicosecond time-scale where the nonlinear phenomenon is more pronounced. The key-role played by nonthermalized carriers is investigated in detail on the basis of an extended TTM.

KW - heavily doped semiconductors

KW - nanocrystals

KW - nonthermalized carriers

KW - plasmonics

KW - pump-probe spectroscopy

KW - two temperature model

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DO - 10.1021/jz401862v

M3 - Article

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SN - 1948-7185

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EP - 3344

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 19

ER -

Ultrafast optical mapping of nonlinear plasmon dynamics in Cu _2-xSe nanoparticles

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Keywords

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