Nonlinear optical switching and all-figures of merit in Bi2S3-xSex/PMMA nanocomposite films investigated by Z scan under visible CW laser

$(a) X-ray diffraction patterns of Bi2S3−xSex/PMMA nanocomposite films at different compositions, x=0, 0.2, 0.4, and 1. (b) The peak intensity as a function of x composition.$

Fig. 3. (a) X-ray diffraction patterns of ${Bi}_{2} S_{3 - x} {Se}_{x} / PMMA$ nanocomposite films at different compositions, $x = 0$ , 0.2, 0.4, and 1. (b) The peak intensity as a function of $x$ composition.

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Fig. 4. SEM images of ${Bi}_{2} S_{3 - x} {Se}_{x} / PMMA$ nanocomposite films at four different compositions, $x = 0$ , 0.2, 0.4, and 1.

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Fig. 5. EDX spectrum of ${Bi}_{2} S_{3 - x} {Se}_{x} / PMMA$ nanocomposite films for composition (a) $x = 0$ and (b) $x = 0.4$ .

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Fig. 6. Optical absorption spectra of ${Bi}_{2} S_{3 - x} {Se}_{x} / PMMA$ nanocomposite films with different compositions $x$ of 0, 0.2, 0.4, and 1. The inset is the plot of ${(α h υ)}^{2}$ as a function of $h υ$ .

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Fig. 7. (I) Closed-aperture and (II) open-aperture Z-scan results at different input powers of the ${Bi}_{2} S_{3 - x} {Se}_{x} / PMMA$ nanocomposite films with different compositions: (a) 0, (b) 0.2, (c) 0.4, and (d) 1. The solid lines are theoretical fitting.

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Table 1. Nonlinear Optical Coefficients and Figures of Merit of Bi2S3−xSex/PMMA Nanocomposite Films with Four Different Compositions of 0, 0.2, 0.4, and 1 at 532 nm Laser Excitation

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Table 1. Nonlinear Optical Coefficients and Figures of Merit of Bi2S3−xSex/PMMA Nanocomposite Films with Four Different Compositions of 0, 0.2, 0.4, and 1 at 532 nm Laser Excitation

Input Power (mW)	$n_{2} \times 10^{- 10} (m^{2} / W)$				$β \times 10^{- 4} (m / W)$				W				T
	Composition, x				Composition, x				Composition, x				Composition, x
	0	0.2	0.4	1.0	0	0.2	0.4	1.0	0	0.2	0.4	1.0	0	0.2	0.4	1.0
5	$- 1.774$	8.1	$- 8.7$	11.14	$- 4$	12.6	20.5	$- 5.7$	0.93	0.7	3.57	4.5	1.19	0.81	1.2	0.3
7	$- 1.75$	6.1	$- 6.6$	10.5	$- 3$	9.19	16.3	$- 6.18$	0.92	0.5	2.7	4.33	0.75	0.79	1.32	0.31
10	$- 1.47$	6.97	$- 5$	7.9	$- 2$	7	10	$- 4.65$	0.77	0.6	2	3.2	0.72	0.53	1.1	0.31
13	$- 1.4$	5.79	$- 3.45$	6.98	$- 1$	5.6	7.9	$- 5.42$	0.74	0.5	1.4	2.8	0.36	0.51	1.2	0.41

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M. Y. Shubar, H. L. Saadon, Saeed J. Abbas. Nonlinear optical switching and all-figures of merit in Bi₂S_3-xSe_x/PMMA nanocomposite films investigated by Z scan under visible CW laser[J]. Chinese Optics Letters, 2020, 18(1): 011902

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Paper Information

Category: Nonlinear Optics

Received: Aug. 20, 2019

Accepted: Sep. 30, 2019

Published Online: Dec. 9, 2019

The Author Email: H. L. Saadon (haithamsaadon@yahoo.com)

DOI:10.3788/COL202018.011902

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology