Reverse saturable absorption in nano colloidal Ge28Sb12Se60 chalcogenide glass

Tintu, R.; Nampoori, V. P. N.; Radhakrishnan, P.; Thomas, Sheenu

doi:10.1016/j.jnoncrysol.2011.03.028

Cited by 14 publications

(4 citation statements)

References 22 publications

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“…In this regard, all nonlinear parameters are tabulated in table 2. Such enhanced ESA in our sample intrigues us, and thus we compare the present result with the previous reports, and the results are summarized in table 3 [13,[28][29][30][31][32]. Quite clearly, the amplitude of β ESA is ~6 orders (10 6 ) higher than previously obtained results and also surpasses the nonlinearity obtained in our last measurements on the As-Sb-Se system by a factor of 10 [19].…”

Section: Resultssupporting

confidence: 82%

Near resonant nanosecond laser-driven nonlinear optical response in As₅₀S₅₀ thin films

Mandal

Khan

Adarsh

2020

J. Phys. D: Appl. Phys.

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Nanosecond near resonant excitation in As50S50 thin films leads to strong nonlinear optical response, i.e. nonlinear absorption coefficient up to 4 × 10 6 cm/GW and nonlinear refractive index of 8.5 cm 2 /GW, both of which is the strongest ever reported in amorphous semiconductors. We propose a five-level energy model to explain such effect which indicates that nonlinear process is reverse saturable absorption in nature, mediated by excited state absorption from triplet-triplet transition. On the other hand, observation of negative nonlinear refractive index reveals the occurrence of self-defocusing effect. Finally, benefitting from the strong nonlinear response, we demonstrate a promising application of As50S50 thin films as an optical limiter for optoelectronic sensors.

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Section: Resultssupporting

confidence: 82%

Near resonant nanosecond laser-driven nonlinear optical response in As₅₀S₅₀ thin films

Mandal

Khan

Adarsh

2020

J. Phys. D: Appl. Phys.

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“…In the case of 50BO 296 the replacement of fluorine atoms by oxygen leads to an increase in the third-order susceptibility, due to the formation of nonbridging oxygen atoms. Additionally, other types of inorganic glasses, using SrBi 2 Ta 2 O 9 , 297 Ge 28 Sb 12 Se 60 , 298,299 and Ga 5 Sb 10 Ge 25 Se 60 , 300 have been also tested for their nonlinear properties: all of them presented quite high nonlinear parameters. Some authors prepared Ge nanocrystals, which were produced in silica using a method of ion implantation and successive annealing.…”

Section: Nanocrystalsmentioning

confidence: 99%

Nonlinear Optical Materials for the Smart Filtering of Optical Radiation

2016

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The control of luminous radiation has extremely important implications for modern and future technologies as well as in medicine. In this Review, we detail chemical structures and their relevant photophysical features for various groups of materials, including organic dyes such as metalloporphyrins and metallophthalocyanines (and derivatives), other common organic materials, mixed metal complexes and clusters, fullerenes, dendrimeric nanocomposites, polymeric materials (organic and/or inorganic), inorganic semiconductors, and other nanoscopic materials, utilized or potentially useful for the realization of devices able to filter in a smart way an external radiation. The concept of smart is referred to the characteristic of those materials that are capable to filter the radiation in a dynamic way without the need of an ancillary system for the activation of the required transmission change. In particular, this Review gives emphasis to the nonlinear optical properties of photoactive materials for the function of optical power limiting. All known mechanisms of optical limiting have been analyzed and discussed for the different types of materials.

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“…In amorphous semiconductor, the optical limiting is described using two photon absorption and n 2 . The optical limiting property of chalcogenide thin films are studied by researchers [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Study of femtosecond nonlinear optical coefficients for Bi doped Se85-xTe15Bix chalcogenide thin films

Yadav¹,

Tyagi²,

Devi³

et al. 2023

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The present work reports the influence of selenium replacement by bismuth on the nonlinear optical parameters of ternary Se85-xTe15Bix (x=0, 1, 2, 3, 4, 5 atomic %) chalcogenide thin films. Calculation of nonlinear refractive index (n2), two-photon absorption coefficient (β2) and third-order susceptibility (χ (3)) by well known Z-scan technique with femtosecond laser pulses were done. The Z-scan spectra for Se85-xTe15Bix upto Bi= 4 atomic % results in self- focusing behavior of n2 is positive while for Bi=5 atomic % n2 is negative. The behavior of n2 by using different physical parameters are exlpained. The comparison of experimental and theoretical values of n2 with pure silica are also studied. The presence of the valley at focus in open aperture Z-scan graph demonstrates strong reverse saturable absorption. The figure of merit (FOM) for the SeTe-Bi chalcogenide thin films is found to be less than 1 and are beneficial for all-optical switch devices.

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Reverse saturable absorption in nano colloidal Ge28Sb12Se60 chalcogenide glass

Cited by 14 publications

References 22 publications

Near resonant nanosecond laser-driven nonlinear optical response in As₅₀S₅₀ thin films

Near resonant nanosecond laser-driven nonlinear optical response in As₅₀S₅₀ thin films

Nonlinear Optical Materials for the Smart Filtering of Optical Radiation

Study of femtosecond nonlinear optical coefficients for Bi doped Se85-xTe15Bix chalcogenide thin films

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Reverse saturable absorption in nano colloidal Ge28Sb12Se60 chalcogenide glass

Cited by 14 publications

References 22 publications

Near resonant nanosecond laser-driven nonlinear optical response in As50S50 thin films

Near resonant nanosecond laser-driven nonlinear optical response in As50S50 thin films

Nonlinear Optical Materials for the Smart Filtering of Optical Radiation

Study of femtosecond nonlinear optical coefficients for Bi doped Se85-xTe15Bix chalcogenide thin films

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Near resonant nanosecond laser-driven nonlinear optical response in As₅₀S₅₀ thin films

Near resonant nanosecond laser-driven nonlinear optical response in As₅₀S₅₀ thin films