Femtosecond laser trapping dynamics of two-photon absorbing hollow-core nanoparticles

Liping Gong; Xiaohe Zhang; Zhuqing Zhu; Guanghao Rui; Jun He; Yiping Cui; Bing Gu

doi:10.3788/COL202018.081901

Journals >Chinese Optics Letters >Volume 18 >Issue 8 >Page 081901 > Article

Chinese Optics Letters
Vol. 18, Issue 8, 081901 (2020)

Femtosecond laser trapping dynamics of two-photon absorbing hollow-core nanoparticles

Liping Gong¹, Xiaohe Zhang¹, Zhuqing Zhu², Guanghao Rui¹, Jun He³, Yiping Cui¹, and Bing Gu^1、4、*

Author Affiliations

¹Advanced Photonics Center, Southeast University, Nanjing 210096, China

²Key Laboratory of Optoelectronic Technology of Jiangsu Province, School of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, China

³School of Physics and Electronics, Central South University, Changsha 410012, China

⁴Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250358, China

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DOI: 10.3788/COL202018.081901 Cite this Article Set citation alerts

Liping Gong, Xiaohe Zhang, Zhuqing Zhu, Guanghao Rui, Jun He, Yiping Cui, Bing Gu. Femtosecond laser trapping dynamics of two-photon absorbing hollow-core nanoparticles[J]. Chinese Optics Letters, 2020, 18(8): 081901 Copy Citation Text

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(a) Transverse force profiles on the y axis (x=z=0) and (b) longitudinal force profiles on the z axis (x=y=0) for both the core and shell with and/or without optical nonlinearities when f=0.125.

Fig. 1. (a) Transverse force profiles on the

y

axis (

x = z = 0

) and (b) longitudinal force profiles on the

z

axis (

x = y = 0

) for both the core and shell with and/or without optical nonlinearities when

f = 0.125

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$Forces and trapping stiffness of the hollow-core particle in absence of optical nonlinearity (χ3s=0) with different volume fractions f. (a) Transverse force distributions on the y axis (x=z=0) and (b) longitudinal force distributions on the z axis (x=y=0) with different values of f. (c) Transverse force profiles on the y axis and (d) longitudinal force profiles on the z axis at three typical values of f. (e) Transverse and (f) longitudinal trapping stiffnesses as functions of f. The gray dotted lines in (e) and (f) are a guide for the eyes.$

Fig. 2. Forces and trapping stiffness of the hollow-core particle in absence of optical nonlinearity (

χ_{3}^{s} = 0

) with different volume fractions

f

. (a) Transverse force distributions on the

y

axis (

x = z = 0

) and (b) longitudinal force distributions on the

z

axis (

x = y = 0

) with different values of

f

. (c) Transverse force profiles on the

y

axis and (d) longitudinal force profiles on the

z

axis at three typical values of

f

. (e) Transverse and (f) longitudinal trapping stiffnesses as functions of

f

. The gray dotted lines in (e) and (f) are a guide for the eyes.

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Fig. 3. Forces and longitudinal trapping potential of two-photon absorbing hollow-core particles at different TPA coefficients. (a) Transverse force distributions on the

y

axis (

x = z = 0

) and (b) longitudinal force distributions on the

z

axis (

x = y = 0

) with different values of

α_{2}^{s}

. (c) Transverse force profiles on the

y

axis and (d) longitudinal force profiles on the

z

axis at different values of

α_{2}^{s}

. (e) Distribution of longitudinal trapping potential on the

z

axis as a function of

α_{2}^{s}

. (f) Profiles of longitudinal trapping potential on the

z

axis at different values of

α_{2}^{s}

. The parameters for calculations are

f = 0.216

and

n_{2}^{s} = 1.2 \times 10^{- 17} m^{2} / W

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Fig. 4. Power-dependent longitudinal forces and velocities at the focal point for two-photon absorbing hollow-core particles with different TPA coefficients. (a)