Wavelength-dependent nonlinear absorption of gold nanocages

Shuang Chen; Suying Yang; Yan Huang; Weiyan Jiao; Guanghua Fan; Yachen Gao

doi:10.3788/COL202018.011901

Journals >Chinese Optics Letters >Volume 18 >Issue 1 >Page 011901 > Article

Chinese Optics Letters
Vol. 18, Issue 1, 011901 (2020)

Wavelength-dependent nonlinear absorption of gold nanocages

Shuang Chen¹, Suying Yang², Yan Huang¹, Weiyan Jiao³, Guanghua Fan³, and Yachen Gao^1、*

Author Affiliations

¹College of Electronic Engineering, Heilongjiang University, Harbin 150080, China

²Physics Group, Chaoyang Medical School, Chaoyang 122000, China

³College of Physics, Harbin Institute of Technology, Harbin 150001, China

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DOI: 10.3788/COL202018.011901 Cite this Article Set citation alerts

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 Copy Citation Text

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Fig. 1. SEM image and size distribution of the gold nanocages (inset).

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Fig. 2. Linear absorption spectra of gold nanocages.

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Fig. 3. Electric field distributions of gold nanocages with incident wavelength of (a) 600 nm and (b) 300 nm.

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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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$λ$ (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
			$1.32 \times 10^{14}$	$1.68 \times 10^{12}$	$4.3 \times 10^{- 12}$

Table 1. Nonlinear Optical Parameters of Gold Nanocages

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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