Nonlinear Optical Properties and Femtosecond Laser Micromachining of Special Glasses

Almeida, Juliana M. P.; Almeida, Guilherme Silva de; Boni, Leonardo De

doi:10.5935/0103-5053.20150238

Cited by 8 publications

(7 citation statements)

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“…In that case the absorption first decreases at 𝑧 ≠ 0 as the blueshift pulls the LP resonance towards it and then appears to increase as 𝑧 → 0 since there it continues to blueshift the LP so far that it starts going off resonance again on the long wavelength side. We note that there is a rich literature of such transition features [31][32][33][34][35][36][37] in open z-scan data, and in all cases the feature is a consequence of intensity dependent frequency pulling of an optical resonance of some sort. This picture also explains the increased broadening in z-scan co-ordinate, increased contrast with power, and implies that the same phenomenology should appear red of the UP, which we have also verified experimentally (not shown).…”

Section: Qualitative Analysismentioning

confidence: 90%

Mechanisms of the Intensity Dependent Refractive Index in Ultrastrongly Coupled Organic Cavity Polaritons

Schwab,

Christopherson,

Crescimanno

et al. 2020

Preprint

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The nonlinear optical response of organic polaritonic matter has received increasing attention due to enhanced and controllable nonlinear response and potential for novel optical devices such as compact photon sources and optical and quantum information devices. Using z-scans over many wavelengths and incident powers we have studied the nonlinear response of ultrastrongly coupled organic cavity polaritons near the lower polariton band. We show that the highly enhanced nonlinear response arises from an intensity-dependent polaritonic resonant frequency. Consequently, we find that these z-scan data can only be described by several terms of a power series expansion in intensity whose respective contributions depend on power broadening and detuning from the lower polariton band. We further show that the nonlinear response can be quantitatively described by a three-level molecular quantum model coupled to the cavity in which saturation reduces the Rabi splitting, thus accounting for the lower polariton band's observed blueshift.

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Section: Qualitative Analysismentioning

confidence: 90%

Mechanisms of the Intensity Dependent Refractive Index in Ultrastrongly Coupled Organic Cavity Polaritons

Schwab,

Christopherson,

Crescimanno

et al. 2020

Preprint

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“…Applications have been found for these nanoparticle/glass structures in photothermal therapy [ 23 ], medical sensing of antibodies [ 24 ], and Raman spectroscopy [ 25 ], just to cite several examples. Metallic NPs containing HMO glasses are also promising materials for use in nonlinear optical devices, as the NPs can also be used to enhance the linear and nonlinear properties of the glasses [ 26 , 27 ]. The introduction of silver has appeared as the most efficient and fruitful route toward the functionalization of glasses with distinctive properties.…”

Section: Description Of the Tellurite And Germanate Glassesmentioning

confidence: 99%

Radiation-Induced Defects and Effects in Germanate and Tellurite Glasses

et al. 2020

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This review focuses on the radiation-induced changes in germanate and tellurite glasses. These glasses have been of great interest due to their remarkable potential for photonics, in terms of extended transmission window in the mid-infrared, ability of rare-earth loading suitable with a laser, and amplification in the near- and mid-infrared or high nonlinear optical properties. Here, we summarize information about possible radiation-induced defects, mechanisms of their formation, and the influence of the glass composition on this process. Special attention is paid to laser-induced structural modification of these glasses, including possible mechanisms of the laser-glass interaction, laser-induced crystallization, and waveguide writing. It is shown that these methods can be used for photostructuring of the glass and have great potential for practical applications.

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“…So, it was impossible at all to conclude (even intuitively) on probable origin of this "effect". As an example of rational and unbiased consideration on this issue, we refer to known works of Almeida et al [50,51] on open aperture Z-scan signatures of nonlinear optical absorption caused by Au MNPs in heavy-metal oxide glasses of GB type (i.e. GeO 2 -Bi 2 O 3 ).…”

Section: Experimental Evidences On Mnps Formation In Glassy Substancesmentioning

confidence: 99%

Metallic nanoparticles (Cu, Ag, Au) in chalcogenide and oxide glassy matrices: comparative assessment in terms of chemical bonding

Shpotyuk¹

2017

Semicond. Phys. Quantum Electron. Optoelectron.

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Principal difference in origin of high-order optical non-linearities caused by metallic nanoparticles such as Cu, Ag and Au embedded destructively in oxide-and chalcogenide-type glassy matrices has been analyzed from the viewpoint of semiempirical chemical bond approach. The numerical criterion has been introduced to describe this difference in terms of mean molar bond energies character for chemical interaction between unfettered components of destructed host glassy matrix and embedded guest atoms. It has been shown that "soft" covalent-bonded networks of chalcogenide glasses of As/Ge-S/Se systems differ essentially from glass-forming oxides like silica by impossibility to accommodate agglomerates of metallic nanoparticles. In contrast, such nanostructurized entities can be well stabilized in Cu-, Ag-or Auembedded oxide glasses in full accordance with numerous experimental evidences. Recent unsubstantiated speculations trying to ascribe this ability to fully-saturated covalent matrices of chalcogenide glasses like As 2 S 3 are analyzed and criticized as the misleading and inconclusive ones.

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Nonlinear Optical Properties and Femtosecond Laser Micromachining of Special Glasses

Cited by 8 publications

References 0 publications

Mechanisms of the Intensity Dependent Refractive Index in Ultrastrongly Coupled Organic Cavity Polaritons

Mechanisms of the Intensity Dependent Refractive Index in Ultrastrongly Coupled Organic Cavity Polaritons

Radiation-Induced Defects and Effects in Germanate and Tellurite Glasses

Metallic nanoparticles (Cu, Ag, Au) in chalcogenide and oxide glassy matrices: comparative assessment in terms of chemical bonding

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