Large femtosecond third-order optical nonlinearity of Bi3.15Nd0.85Ti3O12 ferroelectric thin films

S. Li; X. L. Zhong; G. H. Cheng; X. Liu; J. B. Wang; J. Huang; H. J. Song; C. B. Tan; B. Li; Y. C. Zhou

doi:10.1063/1.4900758

Large femtosecond third-order optical nonlinearity of Bi_3.15Nd_0.85Ti₃O₁₂ ferroelectric thin films

S. Li, X. L. Zhong, G. H. Cheng, X. Liu, J. B. Wang, J. Huang, H. J. Song, C. B. Tan, B. Li, Y. C. Zhou

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Abstract

Both the linear and nonlinear optical properties of Bi_3.15Nd_0.85Ti₃O₁₂ (BNT_0.85) ferroelectric thin films deposited on quartz substrates were investigated. The fundamental optical constants were determined as a function of light wavelength by optical transmittance measurements. By performing single-beam Z-scan experiments with femtosecond laser pulses at a wavelength of 800nm, the two-photon absorption (TPA) coefficient β and third-order nonlinear refraction index γ were measured to be 1.15×10²cm/GW and -8.15×10^-3 cm²/GW, respectively. The large TPA is attributed to an indirect transition process via the intermediate energy levels and the large refractive nonlinearity is the result of the electronic polarization and ferroelectric polarization arisen from the femtosecond midinfrared radiation. The results indicate that the BNT_0.85 thin film is a promising candidate for applications in nonlinear photonic devices.

Original language	English
Article number	192901
Journal	Applied Physics Letters
Volume	105
Issue number	19
DOIs	https://doi.org/10.1063/1.4900758
State	Published - 10 Nov 2014
Externally published	Yes

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@article{e0b658d489d94b4eaf11a7bc6ba8a44c,

title = "Large femtosecond third-order optical nonlinearity of Bi3.15Nd0.85Ti3O12 ferroelectric thin films",

abstract = "Both the linear and nonlinear optical properties of Bi3.15Nd0.85Ti3O12 (BNT0.85) ferroelectric thin films deposited on quartz substrates were investigated. The fundamental optical constants were determined as a function of light wavelength by optical transmittance measurements. By performing single-beam Z-scan experiments with femtosecond laser pulses at a wavelength of 800nm, the two-photon absorption (TPA) coefficient β and third-order nonlinear refraction index γ were measured to be 1.15×102cm/GW and -8.15×10-3 cm2/GW, respectively. The large TPA is attributed to an indirect transition process via the intermediate energy levels and the large refractive nonlinearity is the result of the electronic polarization and ferroelectric polarization arisen from the femtosecond midinfrared radiation. The results indicate that the BNT0.85 thin film is a promising candidate for applications in nonlinear photonic devices.",

author = "S. Li and Zhong, \{X. L.\} and Cheng, \{G. H.\} and X. Liu and Wang, \{J. B.\} and J. Huang and Song, \{H. J.\} and Tan, \{C. B.\} and B. Li and Zhou, \{Y. C.\}",

note = "Publisher Copyright: {\textcopyright} 2014 AIP Publishing LLC.",

year = "2014",

month = nov,

day = "10",

doi = "10.1063/1.4900758",

language = "英语",

volume = "105",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

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T1 - Large femtosecond third-order optical nonlinearity of Bi3.15Nd0.85Ti3O12 ferroelectric thin films

AU - Li, S.

AU - Zhong, X. L.

AU - Cheng, G. H.

AU - Liu, X.

AU - Wang, J. B.

AU - Huang, J.

AU - Song, H. J.

AU - Tan, C. B.

AU - Li, B.

AU - Zhou, Y. C.

PY - 2014/11/10

Y1 - 2014/11/10

N2 - Both the linear and nonlinear optical properties of Bi3.15Nd0.85Ti3O12 (BNT0.85) ferroelectric thin films deposited on quartz substrates were investigated. The fundamental optical constants were determined as a function of light wavelength by optical transmittance measurements. By performing single-beam Z-scan experiments with femtosecond laser pulses at a wavelength of 800nm, the two-photon absorption (TPA) coefficient β and third-order nonlinear refraction index γ were measured to be 1.15×102cm/GW and -8.15×10-3 cm2/GW, respectively. The large TPA is attributed to an indirect transition process via the intermediate energy levels and the large refractive nonlinearity is the result of the electronic polarization and ferroelectric polarization arisen from the femtosecond midinfrared radiation. The results indicate that the BNT0.85 thin film is a promising candidate for applications in nonlinear photonic devices.

AB - Both the linear and nonlinear optical properties of Bi3.15Nd0.85Ti3O12 (BNT0.85) ferroelectric thin films deposited on quartz substrates were investigated. The fundamental optical constants were determined as a function of light wavelength by optical transmittance measurements. By performing single-beam Z-scan experiments with femtosecond laser pulses at a wavelength of 800nm, the two-photon absorption (TPA) coefficient β and third-order nonlinear refraction index γ were measured to be 1.15×102cm/GW and -8.15×10-3 cm2/GW, respectively. The large TPA is attributed to an indirect transition process via the intermediate energy levels and the large refractive nonlinearity is the result of the electronic polarization and ferroelectric polarization arisen from the femtosecond midinfrared radiation. The results indicate that the BNT0.85 thin film is a promising candidate for applications in nonlinear photonic devices.

UR - https://www.scopus.com/pages/publications/84922461845

U2 - 10.1063/1.4900758

DO - 10.1063/1.4900758

M3 - 文章

AN - SCOPUS:84922461845

SN - 0003-6951

VL - 105

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 19

M1 - 192901

ER -

Large femtosecond third-order optical nonlinearity of Bi_3.15Nd_0.85Ti₃O₁₂ ferroelectric thin films

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