Structural, optical, and nonlinear optical absorption/refraction studies of the manganese nanoparticles prepared by laser ablation in ethanol

Ganeev, R. A.; Zakirov, A. S.; Boltaev, Ganjaboy S.; Tugushev, R. I.; Usmanov, T.; Khabibullaev, P. K.; Kang, Tae-Yi; Saidov, A. A.

doi:10.1016/j.optmat.2010.09.033

Cited by 17 publications

(6 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mn is a highly reactive transition metal that can be transformed into a large variety of compounds with multiple valence states of +2, +3, +4, +5, and +6. LAL of Mn is primarily performed to synthesize different types of manganese oxide nanomaterials; it is sometimes employed to synthesize Mn-doped nanostructures, as shown in Table 3 [139][140][141][142][143][144][145][146]. LAL of Mn in water excels at the synthesis of When the ablation period is no less than 15 min, pure Mn 3 O 4 is produced (Figure 8) [142], which indicates that Mn 3 O 4 may evolve from a phase transition of MnO through a completely progressive oxidation process.…”

Section: Mnmentioning

confidence: 99%

Diverse nanomaterials synthesized by laser ablation of pure metals in liquids

Zhang

Liang

2022

Sci. China Phys. Mech. Astron.

View full text Add to dashboard Cite

Diverse nanomaterials, in the forms of carbides, sulfides, oxides, metals, hydroxides, etc., have been synthesized by laser ablation in liquids (LAL) with metal targets as the dominant educts. Many advantages of LAL technique itself and its products have been revealed since 1983 when the first report about LAL was released. Different from traditional wet-chemical synthesis, one unique feature of LAL is its resultant extreme high-temperature and high-pressure local environment for the nucleation and growth of nanomaterials, despite being performed at room temperature. This extreme condition can induce the atomization and ionization of the target materials and liquid molecules to incur different chemical reactions. The laser, liquid, liquid additive, and target can significantly alter the local environment in a broad range. Thus, different phases and shapes of nanomaterials are producible even from the same target. Through directly comparing the products of LAL of 13 kinds of chosen representative metals synthesized under different conditions, this review presents and discusses current understandings, challenging issues, and perspectives related to the diversity of LAL-products, which is willing to promote a deeper investigation and discussion on a clear clarification of the chemical reactions and particle nucleation/growth processes.

show abstract

Section: Mnmentioning

confidence: 99%

Diverse nanomaterials synthesized by laser ablation of pure metals in liquids

Zhang

Liang

2022

Sci. China Phys. Mech. Astron.

View full text Add to dashboard Cite

show abstract

“…Using the Z-scan technique [ 31 ], the nonlinear optical characteristics of the thin perovskite film deposited on the substrate of quartz plate can be investigated. By defining the relative coordinate x = z/z 0 , z 0 being the Rayleigh length, the dependence of the normalized transmittance T ( x ) in the case of the closed aperture (CA) Z-scan can be written as [ 32 ]:

where z 0 = 0.5 kw o 2 , Δ Φ 0 = kγL eff I 0 , Δ Ψ 0 = βI 0 L eff /2, k = 2 π/λ is the wave number, w o is the beam waist radius of the focused radiation, I 0 is the intensity of the probe beam at the focal plane of the focusing lens, γ is the nonlinear refractive index, β is the nonlinear absorption coefficient, L eff = [1 − exp (−α 0 L )]/ α 0 is the effective length of the nonlinear medium, L is the sample thickness, and

is the linear absorption coefficient of suspension. The nonlinear refraction index and nonlinear absorption coefficient were determined by the theoretical fitting of experimental data using Equation (2).…”

Section: Resultsmentioning

confidence: 99%

Giant Third-Order Nonlinear Response of Mixed Perovskite Nanocrystals

et al. 2022

View full text Add to dashboard Cite

Mixed (FAPbI3)0.92(MAPbBr3)0.08 perovskite thin films exhibit strong nonlinear optical responses, rendering them promising candidates for applications in photonics and optical communications. In this work, we present a systematic study on the ultrafast third-order nonlinear optical processes in mixed perovskite nanocrystals (NCs) by exploring the generation of third harmonic radiation and giant two-photon absorption-based photoluminescence (PL) when excited by femtosecond laser pulses of a 1030 nm central wavelength. A comparative analysis of the coherent third harmonic generation in the thin-film-containing perovskite nanocrystals has shown a 40× enhancement of the third harmonic signal compared to the signal generated in the pure quartz substrate. The cubic dependence of the third-nonlinear optical response of the (FAPbI3)0.92(MAPbBr3)0.08 perovskites on the intensity of the driving radiation was identified using broadband 38 femtosecond driving pulses. The positive nonlinear refractive index (γ = +1.4 × 10−12 cm2·W−1) is found to play an important role in improving the phase-matching conditions of the interacting pulses by generating a strong third order harmonic. The giant two-photon absorption (TPA)-assisted PL peak was monitored and a blue shift of the PL was obtained in the higher intensity range of the laser pulses, with the absorption coefficient β estimated to be~+7.0 cm·MW−1 at a 1030 nm laser wavelength.

show abstract

“…The values averaged over all possible orientations 15) are the orientation order parameters of the nanoparticles ensemble in the external field. The angle distribution function of nanoparticles and, hence, the order parameters Q 1 and Q 2, depend on the laser radiation intensity and, via the components α ij , on the radiation frequency.…”

Section: The Theoretical Approachmentioning

confidence: 99%

“…The anomalous nonlinear optical properties are manifested in the fact that, firstly, the nanostructures' optical response on the radiation is of a non-thermal nature and occurs at radiation intensities below 1kW/cm 2 [9]. Second, despite the wide band gap of nanostructures' components (E gap >3eV), this response takes place in the visible and infrared region of light spectrum, and reaches a maximum then decreases to zero under increasing intensity [8,9,[15][16][17].…”

Section: Introductionmentioning

confidence: 99%