Optical Materials, volume 121, pages 111499

Low-order optical nonlinearities of PbS quantum dot liquids and films

Rashid A Ganeev ¹

I A Shuklov ²

Andrey I. Zvyagin ³

D V Dyomkin ²

S I Bocharova ²

V.S. Popov ²

V F Toknova ²

Anna A. Lizunova ²

O.V. Ovchinnikov ³

V F Razumov ^{4, 5}

Hide authors affiliations Show authors affiliations: 5 affiliations

Department of Physics, Voronezh State University, Voronezh, 394006, Russia |

Moscow Institute of Physics and Technology (National Research University) , Dolgoprudny , 141701 , Russia |

Department of Physics , Voronezh State University , Voronezh , 394006 , Russia |

⁴

Institute of Problems of Chemical Physics, Russian Academy of Sciences , Chernogolovka , 142432 , Russia |

⁵

Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, 141701, Russia |

Publication type: Journal Article

Publication date: 2021-11-01

Elsevier

Journal: Optical Materials

Quartile SCImago

Quartile WOS

Impact factor: 3.9

ISSN: 09253467

DOI: 10.1016/j.optmat.2021.111499

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Electronic, Optical and Magnetic Materials

Organic Chemistry

Inorganic Chemistry

Physical and Theoretical Chemistry

Spectroscopy

Atomic and Molecular Physics, and Optics

Electrical and Electronic Engineering

Abstract

We demonstrate the variations of the nonlinear optical parameters in the suspensions and thin films containing PbS quantum dots of different sizes (9 and 2.5 nm). We show that these colloidal quantum dots possess the thermal-lens induced negative nonlinear refraction and reverse saturable absorption in the case of the 532-nm, 10-ns probe pulses. The larger nonlinear absorption coefficients of 9-nm quantum dots compared with 2.5-nm species (1 × 10 −7 and 8 × 10 −9 cm W −1 , respectively) in the case of 1064 nm, 10 ns probe pulses were determined. Similar relations between the nonlinear optical parameters of 9- and 2.5-nm species were maintained in the case of twice shorter wavelength (532 nm) of the probe pulses. The almost ten-fold growth of the nonlinear optical parameters in the visible range compared with the near infrared region was attributed to the stronger influence of the excitonic states on the propagation effects in the former case. We show that the thin films containing these quantum dots demonstrate saturable absorption, while the suspensions show mostly the reverse saturable absorption at 532 nm. A significant enhancement of the nonlinear refractive index of films compared with suspensions (−2 × 10 −8 cm 2 W −1 and -1 × 10 −11 cm 2 W −1 ), as well as a large negative nonlinear absorption coefficient (−3.2 × 10 −5 cm W −1 ) in the former case are demonstrated. We discuss the signs of nonlinear refraction and nonlinear absorption of the quantum dots, as well as the role of the sizes of these species in variations of the nonlinear parameters. • Larger PbS QDs demonstrate stronger nonlinear optical effects compared with smaller QDs. • PbS QDs possess the thermal-lens related negative nonlinear refraction and reverse saturable absorption. • The ten-fold growth of the wavelength-dependent nonlinear optical response of QDs is observed. • Strong influence of the excitonic state on the propagation effects is determined. • QD-containing thin films and suspensions demonstrate strong saturable absorption and reverse saturable absorption.

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Ganeev R. A. et al. Low-order optical nonlinearities of PbS quantum dot liquids and films // Optical Materials. 2021. Vol. 121. p. 111499.

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Ganeev R. A., Shuklov I. A., Zvyagin A. I., Dyomkin D. V., Bocharova S. I., Popov V., Toknova V. F., Lizunova A. A., Ovchinnikov O., Razumov V. F. Low-order optical nonlinearities of PbS quantum dot liquids and films // Optical Materials. 2021. Vol. 121. p. 111499.

RIS |

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RIS Copy

TY - JOUR

DO - 10.1016/j.optmat.2021.111499

UR - https://doi.org/10.1016/j.optmat.2021.111499

TI - Low-order optical nonlinearities of PbS quantum dot liquids and films

T2 - Optical Materials

AU - Ganeev, Rashid A

AU - Shuklov, I A

AU - Zvyagin, Andrey I.

AU - Dyomkin, D V

AU - Bocharova, S I

AU - Popov, V.S.

AU - Toknova, V F

AU - Lizunova, Anna A.

AU - Ovchinnikov, O.V.

AU - Razumov, V F

PY - 2021

DA - 2021/11/01 00:00:00

PB - Elsevier

SP - 111499

VL - 121

SN - 0925-3467

ER -

BibTex

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@article{2021_Ganeev,

author = {Rashid A Ganeev and I A Shuklov and Andrey I. Zvyagin and D V Dyomkin and S I Bocharova and V.S. Popov and V F Toknova and Anna A. Lizunova and O.V. Ovchinnikov and V F Razumov},

title = {Low-order optical nonlinearities of PbS quantum dot liquids and films},

journal = {Optical Materials},

year = {2021},

volume = {121},

publisher = {Elsevier},

month = {nov},

url = {https://doi.org/10.1016/j.optmat.2021.111499},

pages = {111499},

doi = {10.1016/j.optmat.2021.111499}

}

Found error?

Publisher

Elsevier

Journal

Optical Materials

Quartile SCImago

Quartile WOS

Impact factor

3.9

ISSN

09253467 (Print)

Profiles

Popov, Victor S