Direct observation of highly polarized non-linear absorption dipole of single semiconductor quantum rods

Eli Rothenberg; Yuval Ebenstein; Miri Kazes; Uri Banin

doi:10.1557/proc-818-m6.5.1

Direct observation of highly polarized non-linear absorption dipole of single semiconductor quantum rods

Eli Rothenberg^*
, Yuval Ebenstein
, Miri Kazes
, Uri Banin

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Conference article › peer-review

Abstract

Polarization fluorescence microscopy was used to study the nature of the emission and nonlinear absorption dipole of single CdSe/ZnS quantum rods. Rods, with aspect ratios ranging from 2.75 to 15. showed strongly polarized emission consistent with previous one-photon studies. Nonlinear excitation showed a sharp angular dependence fully consistent with the predicted two-photon absorption process. Two-photon absorption probes different transitions than linear absorption due to modified parity and angular momentum selection rules. The two-photon absorption dipole was found to be parallel to the emission polarization, and allows achieving highly orientation selective excitation of quantum rods. This is yet a further demonstration of single molecule measurements in unraveling basic principles of light-matter interaction that are otherwise masked by ensemble averaging.

Original language	English
Pages (from-to)	171-176
Number of pages	6
Journal	MRS Advances
Volume	818
DOIs	https://doi.org/10.1557/proc-818-m6.5.1
State	Published - 2004
Event	Nanoparticles and Nanowire Building Blocks - Synthesis, Processing, Characterization and Theory - San Francisco, CA, United States Duration: 13 Apr 2004 → 16 Apr 2004

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title = "Direct observation of highly polarized non-linear absorption dipole of single semiconductor quantum rods",

abstract = "Polarization fluorescence microscopy was used to study the nature of the emission and nonlinear absorption dipole of single CdSe/ZnS quantum rods. Rods, with aspect ratios ranging from 2.75 to 15. showed strongly polarized emission consistent with previous one-photon studies. Nonlinear excitation showed a sharp angular dependence fully consistent with the predicted two-photon absorption process. Two-photon absorption probes different transitions than linear absorption due to modified parity and angular momentum selection rules. The two-photon absorption dipole was found to be parallel to the emission polarization, and allows achieving highly orientation selective excitation of quantum rods. This is yet a further demonstration of single molecule measurements in unraveling basic principles of light-matter interaction that are otherwise masked by ensemble averaging.",

author = "Eli Rothenberg and Yuval Ebenstein and Miri Kazes and Uri Banin",

year = "2004",

doi = "10.1557/proc-818-m6.5.1",

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journal = "MRS Advances",

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T1 - Direct observation of highly polarized non-linear absorption dipole of single semiconductor quantum rods

AU - Rothenberg, Eli

AU - Ebenstein, Yuval

AU - Kazes, Miri

AU - Banin, Uri

PY - 2004

Y1 - 2004

N2 - Polarization fluorescence microscopy was used to study the nature of the emission and nonlinear absorption dipole of single CdSe/ZnS quantum rods. Rods, with aspect ratios ranging from 2.75 to 15. showed strongly polarized emission consistent with previous one-photon studies. Nonlinear excitation showed a sharp angular dependence fully consistent with the predicted two-photon absorption process. Two-photon absorption probes different transitions than linear absorption due to modified parity and angular momentum selection rules. The two-photon absorption dipole was found to be parallel to the emission polarization, and allows achieving highly orientation selective excitation of quantum rods. This is yet a further demonstration of single molecule measurements in unraveling basic principles of light-matter interaction that are otherwise masked by ensemble averaging.

AB - Polarization fluorescence microscopy was used to study the nature of the emission and nonlinear absorption dipole of single CdSe/ZnS quantum rods. Rods, with aspect ratios ranging from 2.75 to 15. showed strongly polarized emission consistent with previous one-photon studies. Nonlinear excitation showed a sharp angular dependence fully consistent with the predicted two-photon absorption process. Two-photon absorption probes different transitions than linear absorption due to modified parity and angular momentum selection rules. The two-photon absorption dipole was found to be parallel to the emission polarization, and allows achieving highly orientation selective excitation of quantum rods. This is yet a further demonstration of single molecule measurements in unraveling basic principles of light-matter interaction that are otherwise masked by ensemble averaging.

UR - https://www.scopus.com/pages/publications/12744271505

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SN - 0272-9172

VL - 818

SP - 171

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JO - MRS Advances

JF - MRS Advances

T2 - Nanoparticles and Nanowire Building Blocks - Synthesis, Processing, Characterization and Theory

Y2 - 13 April 2004 through 16 April 2004

ER -

Direct observation of highly polarized non-linear absorption dipole of single semiconductor quantum rods

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