Linear and nonlinear optical properties of ultrafine WO3 nanorods

Huang, Dongdong; Zheng, Chan; Huang, Li; Wu, Xiukai; Chen, Ling

doi:10.1016/j.ijleo.2017.12.026

Cited by 15 publications

(6 citation statements)

References 13 publications

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“…In addition, the β eff value is larger than those of classical semiconductors and metallic oxides reported in earlier studies (the NLO parameters of these typical NLO materials are collected in Table S1 in the Supporting Information). [ 31 ]…”

Section: Resultsmentioning

confidence: 99%

Switching the Nonparametric Optical Nonlinearity of Tungsten Oxide by Electrical Modulation

Hou

Sun

et al. 2021

Advanced Optical Materials

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This work shows the electrical switching of the nonparametric optical nonlinearity of tungsten oxide (WO3−x). The sign and magnitude of the effective nonlinear absorption coefficient (βeff) can be modulated via application of an external bias. With laser excitation at 1030 nm, WO3−x shows a relatively large saturable absorption (SA) under an applied voltage (VA) of −2.5 V, with βeff being as large as −632 cm GW−1, while reverse saturable absorption (RSA) is found for VA larger than −1.5 V. The electrical switching of the nonlinear optical (NLO) response is reproducible and durable. Both electrostatic and electrochemical dopings of WO3−x occur during VA variation, with SA resulting mainly from the electrochemical doping (the intercalation of H+ into the lattice of WO3−x). The wavelength‐dependent NLO performance of pristine WO3−x is attributed to competition between one‐photon absorption and two‐photon absorption, while the VA‐derived NLO response is correlated with variation in the band structure and its population. These results suggest a promising approach for the postsynthesis modulation of the NLO response and a potential device configuration for further optoelectric applications.

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Section: Resultsmentioning

confidence: 99%

Switching the Nonparametric Optical Nonlinearity of Tungsten Oxide by Electrical Modulation

Hou

Sun

et al. 2021

Advanced Optical Materials

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“…The modification of the optical transmittance as a function on US signal can be explained by considering that the US frequency is capable to modify the optical and the refractive index; since both are strongly dependent of the vibrational mode of the sample. The study of NPs and nanofluids are of great interest in nanofluidic electronic circuits to manipulate ions and create biomolecular diagnosis devices [1]. The idea of constructing some new devices based on the combination or rearrangement of diodes is found to be applicable in nanofluidics.…”

Section: Resultsmentioning

confidence: 99%

“…The nonlinear optical (NLO) properties of nanomaterials are attractive, due to the possibility of their use in different technological fields [1]. In recent years, a great diversity of nanostructure thin films [2] has been reported observing different NLO properties which are attributable to the quantum confinement [3].…”

Section: Introductionmentioning

confidence: 99%

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Ultrasonic Influence on Plasmonic Effects Exhibited by Photoactive Bimetallic Au-Pt Nanoparticles Suspended in Ethanol

Hurtado-Aviles

Torres²,

Trejo-Valdéz

et al. 2019

Materials

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The optical behavior exhibited by bimetallic nanoparticles was analyzed by the influence of ultrasonic and nonlinear optical waves in propagation through the samples contained in an ethanol suspension. The Au-Pt nanoparticles were prepared by a sol-gel method. Optical characterization recorded by UV-vis spectrophotometer shows two absorption peaks correlated to the synergistic effects of the bimetallic alloy. The structure and nanocrystalline nature of the samples were confirmed by Scanning Transmission Electron Microscopy with X-ray energy dispersive spectroscopy evaluations. The absorption of light associated with Surface Plasmon Resonance phenomena in the samples was modified by the dynamic influence of ultrasonic effects during the propagation of optical signals promoting nonlinear absorption and nonlinear refraction. The third-order nonlinear optical response of the nanoparticles dispersed in the ethanol-based fluid was explored by nanosecond pulses at 532 nm. The propagation of high-frequency sound waves through a nanofluid generates a destabilization in the distribution of the nanoparticles, avoiding possible agglomerations. Besides, the influence of mechanical perturbation, the container plays a major role in the resonance and attenuation effects. Ultrasound interactions together to nonlinear optical phenomena in nanofluids is a promising alternative field for a wide of applications for modulating quantum signals, sensors and acousto-optic devices.

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“…The conduction band has d‐orbital with delocalized electrons, which gives rise to charge‐transfer characteristics for this oxide material . In a recent study, Z‐scan analysis at near infrared region confirmed the high optical nonlinearity of WO 3 nanostructures . It has been found that the nonlinear characteristics strongly depend on the shape of WO 3 nanostructures .…”

Section: Introductionmentioning

confidence: 97%

Triple‐wavelength Q‐switched ytterbium‐doped fiber laser based on tungsten oxide as saturable absorber

Salman

Al‐Janabi

2020

Micro & Optical Tech Letters

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In this article, a multiwavelength Q-switched ytterbiumdoped fiber laser using tungsten oxide nanoparticles (WO 3 NPs) as a saturable absorber (SA) is reported for the first time. The SA was prepared by depositing micron-sized layers of WO 3 NPs suspension onto the surface of the fiber tip via direct deposition process. After embedding the SA into an ytterbium-doped fiber laser cavity, self-starting Q-switched performance was realized at a bleaching threshold of 179 mW having a minimum pulse width of 2.92 μs and maximum pulse energy of 9.26 nJ with variable repetition rates from 14.8 to 71.3 kHz. By boosting the pump power and proper adjustment of the polarization controller, steady dual-and triple-wavelength operations were obtained at pump powers of 210 and 275 mW, respectively. The obtained results confirm the practical use of WO 3 as an effective nonlinear modulator for multiwavelength and pulsed fiber lasers near 1 μm wavelength band. K E Y W O R D S multiwavelength, passive saturable absorber, Q-switching, tungsten oxide nanoparticles, YDFL

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Linear and nonlinear optical properties of ultrafine WO3 nanorods

Cited by 15 publications

References 13 publications

Switching the Nonparametric Optical Nonlinearity of Tungsten Oxide by Electrical Modulation

Switching the Nonparametric Optical Nonlinearity of Tungsten Oxide by Electrical Modulation

Ultrasonic Influence on Plasmonic Effects Exhibited by Photoactive Bimetallic Au-Pt Nanoparticles Suspended in Ethanol

Triple‐wavelength Q‐switched ytterbium‐doped fiber laser based on tungsten oxide as saturable absorber

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