Wavelength-dependent nonlinear absorption of gold nanocages

Fig. 4. Open-aperture Z-scan curves for (a) gold nanocages at 550 nm and 300 μJ, (b) gold nanocages at 550 nm and 800 μJ, (c) gold nanocages at 600 nm and 300 μJ, (d) gold nanocages at 600 nm and 800 μJ, (e) gold nanocages at 650 nm and 300 μJ, and (f) gold nanocages at 650 nm and 800 μJ. The dots are experimental data, while the solid lines are the generated theoretical fit.

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Fig. 5. Solid lines are the linear absorption spectra. The dots are saturation strength $I_{s}$ and nonlinear absorption coefficient $β$ versus wavelength when $I_{0}$ is (a) $4.95 \times 10^{13} W / m^{2}$ and (b) and (c) $1.32 \times 10^{14} W / m^{2}$ .

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Table 1. Nonlinear Optical Parameters of Gold Nanocages

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Table 1. Nonlinear Optical Parameters of Gold Nanocages

$λ$ (nm)	$α_{ns}$ (m⁻¹)	$α_{0}$ (m⁻¹)	$I_{0}$ (W/m²)	$I_{s}$ (W/m²)	$β$ (m/W)
550	$6.38 \times 10^{2}$	$2.01 \times 10^{1}$	$4.95 \times 10^{13}$	$5.00 \times 10^{12}$	0
			$1.32 \times 10^{14}$	$1.33 \times 10^{13}$	$5.2 \times 10^{- 12}$
600	$1.84 \times 10^{3}$	$5.89 \times 10^{2}$	$4.95 \times 10^{13}$	$6.18 \times 10^{12}$	0
			$1.32 \times 10^{14}$	$1.89 \times 10^{13}$	$3.68 \times 10^{- 12}$
650	$9.01 \times 10^{2}$	$2.89 \times 10^{1}$	$4.95 \times 10^{13}$	$5.18 \times 10^{12}$	0
			$1.32 \times 10^{14}$	$1.68 \times 10^{12}$	$4.3 \times 10^{- 12}$

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Shuang Chen, Suying Yang, Yan Huang, Weiyan Jiao, Guanghua Fan, Yachen Gao. Wavelength-dependent nonlinear absorption of gold nanocages[J]. Chinese Optics Letters, 2020, 18(1): 011901

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Paper Information

Category: Nonlinear Optics

Received: Aug. 12, 2019

Accepted: Sep. 29, 2019

Posted: Oct. 8, 2019

Published Online: Dec. 12, 2019

The Author Email: Yachen Gao (gaoyachen@hlju.edu.cn)

DOI:10.3788/COL202018.011901

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology