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

Chinese Optics Letters, Volume. 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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Figures & Tables(4)

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) $F_{z} (r = 0)$ against $P$ and $α_{2}^{s}$ . (b) Examples of power-dependent $F_{z} (r = 0)$ . (c) $v (r = 0)$ against $P$ and $α_{2}^{s}$ . (d) Examples of power-dependent $v (r = 0)$ . The parameters for calculations are $f = 0.216$ and $n_{2}^{s} = 1.2 \times 10^{- 17} m^{2} / W$ .

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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," Chin. Opt. Lett. 18, 081901 (2020)

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Paper Information

Category: Nonlinear Optics

Received: May. 18, 2020

Accepted: Jun. 10, 2020

Posted: Jun. 10, 2020

Published Online: Jul. 14, 2020

The Author Email: Bing Gu (gubing@seu.edu.cn)

DOI:10.3788/COL202018.081901

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology