Enhanced short wave IR third order nonlinearity of gold nanoparticle embedded ZnO thin films

S. Akbar Ali; P. B. Bisht; B. S. Kalanoor; Anuradha Patra; S. Kasiviswanathan

doi:10.1364/JOSAB.30.002226

Journal of the Optical Society of America B
Vol. 30,
Issue 8,
pp. 2226-2232
(2013)
•https://doi.org/10.1364/JOSAB.30.002226

Enhanced short wave IR third order nonlinearity of gold nanoparticle embedded ZnO thin films

S. Akbar Ali, P. B. Bisht, B. S. Kalanoor, Anuradha Patra, and S. Kasiviswanathan

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S. Akbar Ali, P. B. Bisht, B. S. Kalanoor, Anuradha Patra, and S. Kasiviswanathan, "Enhanced short wave IR third order nonlinearity of gold nanoparticle embedded ZnO thin films," J. Opt. Soc. Am. B 30, 2226-2232 (2013)

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Abstract

Gold nanoparticle embedded ZnO thin films have been studied at the fundamental and second harmonic wavelengths of a picosecond laser by Z-scan technique. The films exhibit the effect of saturable absorption and self-defocusing. Large value third order nonlinear susceptibility ( $\sim 10^{- 8} esu$ ) has been observed at 1064 nm. Fast relaxation time measurements have been performed with the diffraction of the probe beam with laser-induced transient grating technique. Figure of merit values for optical switching applications have been obtained. One of the samples has been tested for passive mode-locking applications in combination with the standard saturable absorber, IR26.

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	GBX		GBY		AuNPs	IR26a	PtNPsb
	1064 nm	532 nm	1064 nm	532 nm	532 nm	1064 nm	1064 nm
$α_{0} (/ cm)$	$16 \times 10^{3}$	$14 \times 10^{3}$	$13 \times 10^{3}$	$15 \times 10^{3}$	$80 \times 10^{3}$	14.0	0.3
$I_{S} (GW / {cm}^{2})$	3.8	5.7	4.0	4.8	0.4	0.3	5.0
$β (cm / GW)$	−4065	−3237	−3222	−4660	$- 8200 \times 10^{2}$	−44	−0.06
$n_{2} (m^{2} / W)$	$- 6.0 \times 10^{- 15}$	$- 6.3 \times 10^{- 15}$	$- 6.3 \times 10^{- 15}$	$- 4.2 \times 10^{- 15}$	$- 4.5 \times 10^{- 13}$	$- 2.8 \times 10^{- 19}$
$χ^{(3)} (esu)$	$1.2 \times 10^{- 8}$	$3.0 \times 10^{- 9}$	$1.2 \times 10^{- 8}$	$2.2 \times 10^{- 9}$	$4.0 \times 10^{- 8}$	$2.0 \times 10^{- 11}$	$1.7 \times 10^{- 13}$

	532 nm		1064 nm
Sample	$I_{0} (GW / {cm}^{2})$	W	$I_{0} (GW / {cm}^{2})$	W
AuNPs	0.4	0.44
GBX	17.0	1.40	30.0	0.52
GBY	17.0	0.83	30.0	1.40

	GBX		GBY		AuNPs	IR26a	PtNPsb
	1064 nm	532 nm	1064 nm	532 nm	532 nm	1064 nm	1064 nm
$α_{0} (/ cm)$	$16 \times 10^{3}$	$14 \times 10^{3}$	$13 \times 10^{3}$	$15 \times 10^{3}$	$80 \times 10^{3}$	14.0	0.3
$I_{S} (GW / {cm}^{2})$	3.8	5.7	4.0	4.8	0.4	0.3	5.0
$β (cm / GW)$	−4065	−3237	−3222	−4660	$- 8200 \times 10^{2}$	−44	−0.06
$n_{2} (m^{2} / W)$	$- 6.0 \times 10^{- 15}$	$- 6.3 \times 10^{- 15}$	$- 6.3 \times 10^{- 15}$	$- 4.2 \times 10^{- 15}$	$- 4.5 \times 10^{- 13}$	$- 2.8 \times 10^{- 19}$
$χ^{(3)} (esu)$	$1.2 \times 10^{- 8}$	$3.0 \times 10^{- 9}$	$1.2 \times 10^{- 8}$	$2.2 \times 10^{- 9}$	$4.0 \times 10^{- 8}$	$2.0 \times 10^{- 11}$	$1.7 \times 10^{- 13}$

	532 nm		1064 nm
Sample	$I_{0} (GW / {cm}^{2})$	W	$I_{0} (GW / {cm}^{2})$	W
AuNPs	0.4	0.44
GBX	17.0	1.40	30.0	0.52
GBY	17.0	0.83	30.0	1.40

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