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Sahoo S, Surbhi K, Bhakta S, Das R, Sahoo PK. Influence of defects on the linear and nonlinear optical properties of Cu-doped rutile TiO 2 microflowers. Phys Chem Chem Phys 2024; 26:10191-10201. [PMID: 38497147 DOI: 10.1039/d3cp05693g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Defects and disorder work as controlling parameters to alter the electronic structure of nanostructures and significantly influence their electronic, magnetic, and nonlinear optical (NLO) properties. In this study, we found that defect engineering is an effective strategy for tailoring the linear and nonlinear optical properties of Cu-doped titanium oxide (TiO2) flower-shaped nanostructures. The concentration of chemical doping of Cu in the TiO2 lattice creates intermediate defect states that impact electronic bandgap reduction and tunable defect luminescence. The estimation of the bandgap from density functional theory calculation follows the same trend of bandgap narrowing with Cu doping. The XPS study reveals that oxygen defects are responsible for bandgap narrowing and quenching of the PL intensity. A single-beam Z-scan technique with open and closed aperture configurations using ultrashort pulses centered at 532 nm excitation wavelength was used to study the NLO measurements. The open aperture reveals saturable absorption, whereas the closed aperture shows self-focusing behavior. The nonlinear absorption coefficient and refractive index extracted from NLO measurements demonstrate the linear dependence on the defect concentration and bandgap. The effects of heterogeneous dopants and lattice disorder on the nonlinear absorption behavior of these nanostructures are discussed in comparison with the figure of merit, non-linear refractive index, and absorption coefficient. The tunable NLO properties achieved by controlling such dopant-induced defects boost the scope of these nanostructures as optical limiting, optical switching, and optical photodiode applications.
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Affiliation(s)
- Subhashree Sahoo
- School of Physical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, An OCC of Homi Bhabha National Institute, Jatni-752050, Odisha, India.
| | - Km Surbhi
- School of Physical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, An OCC of Homi Bhabha National Institute, Jatni-752050, Odisha, India.
| | - Sourav Bhakta
- School of Physical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, An OCC of Homi Bhabha National Institute, Jatni-752050, Odisha, India.
| | - Ritwick Das
- School of Physical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, An OCC of Homi Bhabha National Institute, Jatni-752050, Odisha, India.
| | - Pratap K Sahoo
- School of Physical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, An OCC of Homi Bhabha National Institute, Jatni-752050, Odisha, India.
- Center for Interdisciplinary Sciences (CIS), NISER Bhubaneswar, HBNI, Jatni-752050, Odisha, India
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Torres-Torres D, Bornacelli J, Vega-Becerra O, Garay-Tapia AM, Aguirre-Tostado FS, Torres-Torres C, Oliver A. Magnetic Force Microscopy Study of Multiscale Ion-Implanted Platinum in Silica Glass, Recorded by an Ultrafast Two-Wave Mixing Configuration. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2020; 26:53-62. [PMID: 31831082 DOI: 10.1017/s1431927619015204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This study explores magnetization exhibited by nanoscale platinum-based structures embedded in pure silica plates. A superposition of laser pulses in the samples produced periodic linear arrangements of micro-sized structures. The samples were integrated by PtO2 microstructures (PtOΣs) with dispersed Pt oxide nanoparticles in their surroundings. The characterization of the materials was performed by high transmission electron microscopy studies. Furthermore, topographical and magnetic effects on the sample surfaces were analyzed by atomic force microscopy and magnetic force microscopy, respectively. The magnetic measurements indicated an enhancement in the gradient phase shift and in the gradient force related to the magnetic PtOΣs. The possibility of tuning the magnetic characteristics of the samples through contact with a Nd2Fe14B magnet was demonstrated. This process corresponds to an innovative method for obtaining magnetic PtOΣs induced by laser pulses. Moreover, an increase in the compactness of the silica with platinum-based structures was confirmed by an evaluation of the effective elastic modulus with reference to pure silica. The multimodal magnetic structures studied in this work seem to be candidates for developing high-density magnetic storage media.
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Affiliation(s)
- David Torres-Torres
- Centro de Investigación en Materiales Avanzados, S.C. Unidad Monterrey, Apodaca, Nuevo León66600, México
| | - Jhovani Bornacelli
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Ingeniería Mecánica y Eléctrica Unidad Zacatenco, Instituto Politécnico Nacional, Ciudad de México07738, México
| | - Oscar Vega-Becerra
- Centro de Investigación en Materiales Avanzados, S.C. Unidad Monterrey, Apodaca, Nuevo León66600, México
| | - Andres M Garay-Tapia
- Centro de Investigación en Materiales Avanzados, S.C. Unidad Monterrey, Apodaca, Nuevo León66600, México
| | | | - Carlos Torres-Torres
- Sección de Estudios de Posgrado e Investigación, Escuela Superior de Ingeniería Mecánica y Eléctrica Unidad Zacatenco, Instituto Politécnico Nacional, Ciudad de México07738, México
| | - Alicia Oliver
- Instituto de Física, Universidad Nacional Autónoma de México, Ciudad de México04510, México
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Huang H, Lin J, Zhu G, Weng Y, Wang X, Fu X, Long J. A Long-Lived Mononuclear Cyclopentadienyl Ruthenium Complex Grafted onto Anatase TiO2
for Efficient CO2
Photoreduction. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602796] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Haowei Huang
- State Key Laboratory of Photocatalysis on Energy and Environment; College of Chemistry; Fuzhou University; Fuzhou 350116 P.R. China
| | - Jinjin Lin
- State Key Laboratory of Photocatalysis on Energy and Environment; College of Chemistry; Fuzhou University; Fuzhou 350116 P.R. China
| | - Gangbei Zhu
- Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics; Institute of Physics; Chinese Academy of Science; No. 8, 3rd South Street, Zhongguancun, Haidian District Beijing 100190 P.R. China
| | - Yuxiang Weng
- Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics; Institute of Physics; Chinese Academy of Science; No. 8, 3rd South Street, Zhongguancun, Haidian District Beijing 100190 P.R. China
| | - Xuxu Wang
- State Key Laboratory of Photocatalysis on Energy and Environment; College of Chemistry; Fuzhou University; Fuzhou 350116 P.R. China
| | - Xianzhi Fu
- State Key Laboratory of Photocatalysis on Energy and Environment; College of Chemistry; Fuzhou University; Fuzhou 350116 P.R. China
| | - Jinlin Long
- State Key Laboratory of Photocatalysis on Energy and Environment; College of Chemistry; Fuzhou University; Fuzhou 350116 P.R. China
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4
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A Long-Lived Mononuclear Cyclopentadienyl Ruthenium Complex Grafted onto Anatase TiO2
for Efficient CO2
Photoreduction. Angew Chem Int Ed Engl 2016; 55:8314-8. [DOI: 10.1002/anie.201602796] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Revised: 04/23/2016] [Indexed: 11/07/2022]
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He GS, Law WC, Baev A, Liu S, Swihart MT, Prasad PN. Nonlinear optical absorption and stimulated Mie scattering in metallic nanoparticle suspensions. J Chem Phys 2013; 138:024202. [DOI: 10.1063/1.4773340] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Evans CC, Bradley JDB, Martí-Panameño EA, Mazur E. Mixed two- and three-photon absorption in bulk rutile (TiO2) around 800 nm. OPTICS EXPRESS 2012; 20:3118-3128. [PMID: 22330549 DOI: 10.1364/oe.20.003118] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We observe mixed two- and three-photon absorption in bulk rutile (TiO2) around 800 nm using the open aperture Z-scan technique. We fit the data with an extended model that includes multiphoton absorption, beam quality, and ellipticity. The extracted two- and three-photon absorption coefficients are below 1 mm/GW and 2 mm3/GW2, respectively. We observe negligible two-photon absorption for 813-nm light polarized along the extraordinary axis. We measure the nonlinear index of refraction and obtain two-photon nonlinear figures of merit greater than 1.1 at 774 nm and greater than 12 at 813 nm. Similarly, we obtain three-photon figures of merit that allow operational intensities up to 0.57 GW/mm2. We conclude that rutile is a promising material for all-optical switching applications around 800 nm.
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Affiliation(s)
- Christopher C Evans
- School of Engineering and Applied Sciences, Harvard University, 9 Oxford Street, Cambridge, Massachusetts 02138, USA
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Zhang K, Li J, Wang W, Xiao J, Yin W, Yu L. Enhancing the linear absorption and tuning the nonlinearity of TiO2 nanowires through the incorporation of Ag nanoparticles. OPTICS LETTERS 2011; 36:3443-3445. [PMID: 21886238 DOI: 10.1364/ol.36.003443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We report on the enhanced linear absorption and modified nonlinear absorption of TiO2 nanowires coated with Ag nanoparticles. Experimental results indicated that the coated Ag nanoparticles significantly increased the linear absorption of the nanostructures in the wavelength range of visible light. Z-scan experiments showed that when the excitation energy increased, the nonlinear absorption of the TiO2 nanowires changed from reverse-saturable absorption to saturable absorption. When Ag nanoparticles were coated on the TiO2 nanowires, the reverse-saturable absorption was significantly inhibited. The as-prepared nanostructures may find potential applications in the field of solar cells and all-optical switching.
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Affiliation(s)
- Kai Zhang
- State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, China
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Torres-Torres C, Castro-Chacón JH, Castañeda L, Rangel Rojo R, Torres-Martínez R, Tamayo-Rivera L, Khomenko AV. Ultrafast nonlinear optical response of photoconductive ZnO films with fluorine nanoparticles. OPTICS EXPRESS 2011; 19:16346-16355. [PMID: 21934998 DOI: 10.1364/oe.19.016346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The absorptive and refractive third order nonlinear optical properties exhibited by a ZnO thin solid film with fluorine nanoparticles were studied with picosecond and femtosecond pulses using different techniques. We were able to evaluate the photoconductivity of the material and the quenching of the induced birefringence observed in the presence of two-photon absorption. The samples were prepared by a chemical spray deposition technique. In order to investigate the different contributions of the third order nonlinearities of the film, we analyzed the vectorial self-diffraction effect and the optical Kerr transmittance observed in the sample. A dominantly absorptive nonlinearity was measured at a 532 nm wavelength with 50 ps pulses, while nonlinear refraction was found to be negligible in this regime. On the other side, a pure electronic refractive third order nonlinearity without the contribution of nonlinear absorption was detected at 830 nm with 80 fs pulse duration. A quasi-instantaneous optical response and a strong enhancement in the ultrafast nonlinear refraction with the inhibition of the picosecond two-photon absorption mechanism were measured for the case of the femtosecond excitation.
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Affiliation(s)
- C Torres-Torres
- Sección de Estudios de Posgrado e Investigación, ESIME-Z, Instituto Politécnico Nacional, México, DF, 07738, México.
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López-Suárez A, R RR, Torres-Torres C, Benami A, Tamayo-Rivera L, Reyes-Esqueda JA, Cheang-Wong JC, Rodríguez-Fernández L, Crespo-Sosa A, Oliver A. Enhancement of the optical Kerr effect exhibited by an integrated configuration of silicon quantum dots and silver nanoparticles. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/274/1/012145] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Torres-Torres C, Peréa-López N, Reyes-Esqueda JA, Rodríguez-Fernández L, Crespo-Sosa A, Cheang-Wong JC, Oliver A. Ablation and optical third-order nonlinearities in Ag nanoparticles. Int J Nanomedicine 2010; 5:925-32. [PMID: 21187944 PMCID: PMC3010154 DOI: 10.2147/ijn.s12463] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
The optical damage associated with high intensity laser excitation of silver nanoparticles (NPs) was studied. In order to investigate the mechanisms of optical nonlinearity of a nanocomposite and their relation with its ablation threshold, a high-purity silica sample implanted with Ag ions was exposed to different nanosecond and picosecond laser irradiations. The magnitude and sign of picosecond refractive and absorptive nonlinearities were measured near and far from the surface plasmon resonance (SPR) of the Ag NPs with a self-diffraction technique. Saturable optical absorption and electronic polarization related to self-focusing were identified. Linear absorption is the main process involved in nanosecond laser ablation, but non-linearities are important for ultrashort picosecond pulses when the absorptive process become significantly dependent on the irradiance. We estimated that near the resonance, picosecond intraband transitions allow an expanded distribution of energy among the NPs, in comparison to the energy distribution resulting in a case of far from resonance, when the most important absorption takes place in silica. We measured important differences in the ablation threshold and we estimated that the high selectiveness of the SPR of Ag NPs as well as their corresponding optical nonlinearities can be strongly significant for laser-induced controlled explosions, with potential applications for biomedical photothermal processes.
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Affiliation(s)
- Carlos Torres-Torres
- Section of Graduate Studies and Research, School of Mechanical and Electrical Engineering, National Polytechnic Institute, Zacatenco, Distrito Federal, Mexico.
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