Efficient optical trapping of CdTe quantum dots by femtosecond laser pulses

Weiyi Chiang; Tomoki Okuhata; Anwar Usman; Naoto Tamai; Hiroshi Masuhara

doi:10.1021/jp502524f

Efficient optical trapping of CdTe quantum dots by femtosecond laser pulses

Weiyi Chiang, Tomoki Okuhata, Anwar Usman, Naoto Tamai, Hiroshi Masuhara

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

32 Scopus citations

Abstract

The development in optical trapping and manipulation has been showing rapid progress, most of it is in the small particle sizes in nanometer scales, substituting the conventional continuous-wave lasers with high-repetition-rate ultrashort laser pulse train and nonlinear optical effects. Here, we evaluate two-photon absorption in optical trapping of 2.7 nm-sized CdTe quantum dots (QDs) with high-repetition-rate femtosecond pulse train by probing laser intensity dependence of both Rayleigh scattering image and the two-photon-induced luminescence spectrum of the optically trapped QDs. The Rayleigh scattering imaging indicates that the two-photon absorption (TPA) process enhances trapping ability of the QDs. Similarly, a nonlinear increase of the two-photon-induced luminescence with the incident laser intensity fairly indicates the existence of the TPA process.

Original language	English (US)
Pages (from-to)	14010-14016
Number of pages	7
Journal	The Journal of Physical Chemistry B
Volume	118
Issue number	49
DOIs	https://doi.org/10.1021/jp502524f
State	Published - Jun 24 2014

ASJC Scopus subject areas

Materials Chemistry
Surfaces, Coatings and Films
Physical and Theoretical Chemistry

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title = "Efficient optical trapping of CdTe quantum dots by femtosecond laser pulses",

abstract = "The development in optical trapping and manipulation has been showing rapid progress, most of it is in the small particle sizes in nanometer scales, substituting the conventional continuous-wave lasers with high-repetition-rate ultrashort laser pulse train and nonlinear optical effects. Here, we evaluate two-photon absorption in optical trapping of 2.7 nm-sized CdTe quantum dots (QDs) with high-repetition-rate femtosecond pulse train by probing laser intensity dependence of both Rayleigh scattering image and the two-photon-induced luminescence spectrum of the optically trapped QDs. The Rayleigh scattering imaging indicates that the two-photon absorption (TPA) process enhances trapping ability of the QDs. Similarly, a nonlinear increase of the two-photon-induced luminescence with the incident laser intensity fairly indicates the existence of the TPA process.",

author = "Weiyi Chiang and Tomoki Okuhata and Anwar Usman and Naoto Tamai and Hiroshi Masuhara",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This work was supported the Ministry of Education of Taiwan (MOE-ATU Project; National Chiao Tung University) and the National Science Council of Taiwan (Grant NSC 100-2113-M-009-001). H.M. also thanks the Foundation of the Advancement for Outstanding Scholarship of Taiwan. The reviewers are also acknowledged for their valuable comments and advice.",

year = "2014",

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doi = "10.1021/jp502524f",

language = "English (US)",

volume = "118",

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journal = "The Journal of Physical Chemistry B",

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T1 - Efficient optical trapping of CdTe quantum dots by femtosecond laser pulses

AU - Chiang, Weiyi

AU - Okuhata, Tomoki

AU - Usman, Anwar

AU - Tamai, Naoto

AU - Masuhara, Hiroshi

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This work was supported the Ministry of Education of Taiwan (MOE-ATU Project; National Chiao Tung University) and the National Science Council of Taiwan (Grant NSC 100-2113-M-009-001). H.M. also thanks the Foundation of the Advancement for Outstanding Scholarship of Taiwan. The reviewers are also acknowledged for their valuable comments and advice.

PY - 2014/6/24

Y1 - 2014/6/24

N2 - The development in optical trapping and manipulation has been showing rapid progress, most of it is in the small particle sizes in nanometer scales, substituting the conventional continuous-wave lasers with high-repetition-rate ultrashort laser pulse train and nonlinear optical effects. Here, we evaluate two-photon absorption in optical trapping of 2.7 nm-sized CdTe quantum dots (QDs) with high-repetition-rate femtosecond pulse train by probing laser intensity dependence of both Rayleigh scattering image and the two-photon-induced luminescence spectrum of the optically trapped QDs. The Rayleigh scattering imaging indicates that the two-photon absorption (TPA) process enhances trapping ability of the QDs. Similarly, a nonlinear increase of the two-photon-induced luminescence with the incident laser intensity fairly indicates the existence of the TPA process.

AB - The development in optical trapping and manipulation has been showing rapid progress, most of it is in the small particle sizes in nanometer scales, substituting the conventional continuous-wave lasers with high-repetition-rate ultrashort laser pulse train and nonlinear optical effects. Here, we evaluate two-photon absorption in optical trapping of 2.7 nm-sized CdTe quantum dots (QDs) with high-repetition-rate femtosecond pulse train by probing laser intensity dependence of both Rayleigh scattering image and the two-photon-induced luminescence spectrum of the optically trapped QDs. The Rayleigh scattering imaging indicates that the two-photon absorption (TPA) process enhances trapping ability of the QDs. Similarly, a nonlinear increase of the two-photon-induced luminescence with the incident laser intensity fairly indicates the existence of the TPA process.

UR - http://hdl.handle.net/10754/563918

UR - https://pubs.acs.org/doi/10.1021/jp502524f

UR - http://www.scopus.com/inward/record.url?scp=84917709027&partnerID=8YFLogxK

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DO - 10.1021/jp502524f

M3 - Article

SN - 1520-6106

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SP - 14010

EP - 14016

JO - The Journal of Physical Chemistry B

JF - The Journal of Physical Chemistry B

IS - 49

ER -

Efficient optical trapping of CdTe quantum dots by femtosecond laser pulses

Abstract

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