Studies on phase change Ge15Se77Sb8 thin films by laser irradiation

Srivastava, Archana; Tripathi, Ravi P. N.; Akhtar, M. Shaheer; Khan, Shahanavaj

doi:10.1007/s10854-015-4041-9

Cited by 6 publications

(1 citation statement)

References 26 publications

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“…The possibility for modification in the refractive index of ChGs and their high photosensitivity make them a suitable candidate for their application in writing channel waveguides [5]. The availability of ChGs as thin films is another advantage of them in the field of integrated optics [6]. When we reduce the size of chalcogenides from bulk to nano range the quantum size effect occurs.…”

Section: Introductionmentioning

confidence: 99%

Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se₈₅Te₃Bi₁₂ nano-thin films

Srivastava,

Khan,

Khan

2023

J. Phys. D: Appl. Phys.

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In this research work, we have synthesized non-crystalline Se85Te3Bi12 chalcogenide glasses by conventional melt quenching technique. The differential scanning calorimetry measurement of the synthesized specimen was done to confirm the glassy as well as non-crystalline nature of the bulk Se85Te3Bi12 alloy. The nano-thin films of thickness 30 nm of the synthesized sample at two different ambient argon pressures (1 Torr and 3 Torr) were made using the physical vapor condensation technique at a constant substrate temperature of 77 K using liquid nitrogen. The non-appearance of prominent peaks in the high-resolution x-ray diffractometer profile confirmed the non-crystalline nature of synthesized nano-thin films. The morphological analysis of the prepared nano-thin films using Field emission scanning electron microscopy confirmed the nanochalcogenide having particle size ranges from 30–90 nm. The Fourier transform infrared (FTIR) spectroscopy suggests the presence of moisture and carbon impurities in the prepared nano-thin films. The broad optical transmission shadow observed in the FTIR results is an essential requirement for new-generation IR systems. Based on UV-visible spectroscopy, optical parameters such as optical absorption coefficients, Urbach energy, optical band gaps, Tauc’s parameter and extinction coefficients were measured for synthesized Se85Te3Bi12 nano-thin films. The value of absorption coefficients, Tauc’s parameters, optical band gap and extinction coefficients increases with the increase of ambient argon pressure. The outcome of these studies recommends that these materials can be a preeminent candidate for photovoltaic applications. Photoluminescence spectroscopy results are accredited to the accumulation of non-crystalline nanochalcogenide particles on the substrates. DC conductivity measurements further confirm the semiconducting nature of the nanochalcogenide Se85Te3Bi12 thin films.

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Section: Introductionmentioning

confidence: 99%

Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se₈₅Te₃Bi₁₂ nano-thin films

Srivastava,

Khan,

Khan

2023

J. Phys. D: Appl. Phys.

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Laser induced birefringence in La–Ga–S–O–Gd glass polymer nanocomposites

Rusek

El-Naggar

Albassam

et al. 2016

J Mater Sci: Mater Electron

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In this work, we demonstrate a possibility to use La-GaS -O-Gd glass polymer nanocomposites as effective materials for photo-induced birefringence. Here we chose PVA as a photopolymer matrix. The photo-induced effects were studied using 8 ns Nd: YAG laser generating bicolor coherent light beams with wavelengths 1064, and 532 nm. The detection of the photo-induced birefringence was carried out using cw He-Ne laser at 1150 nm. The optimal concentration of the nanoglass favoring maximal changes of refractive indices is established. The photo-induced laser power density was changed up to 0.9 GW/cm2. The photo-induced beams were incident at angles varying within the 32° and 52° with respect to the nanocomposite planes. The polarizations of the beams did not play principal role. We discovered an appearance of maximal birefringence equal to about 0.078. The effect is strongly dependent on the nanoparticle sizes and is completely reversible after switching off the laser treatment within several milliseconds. Such features are useful for the recording of optical information and production of gratings with desirable periods.

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Investigations of thermal, optical and electrical properties of Se85In15−xBix glasses and thin films

Tripathi

Alvi

Khan

2020

J Therm Anal Calorim

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Studies on phase change Ge15Se77Sb8 thin films by laser irradiation

Cited by 6 publications

References 26 publications

Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se₈₅Te₃Bi₁₂ nano-thin films

Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se₈₅Te₃Bi₁₂ nano-thin films

Laser induced birefringence in La–Ga–S–O–Gd glass polymer nanocomposites

Investigations of thermal, optical and electrical properties of Se85In15−xBix glasses and thin films

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Studies on phase change Ge15Se77Sb8 thin films by laser irradiation

Cited by 6 publications

References 26 publications

Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se85Te3Bi12 nano-thin films

Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se85Te3Bi12 nano-thin films

Laser induced birefringence in La–Ga–S–O–Gd glass polymer nanocomposites

Investigations of thermal, optical and electrical properties of Se85In15−xBix glasses and thin films

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Product

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About

Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se₈₅Te₃Bi₁₂ nano-thin films

Effect of ambient argon pressure on the structural, optical and electrical properties of non-crystalline Se₈₅Te₃Bi₁₂ nano-thin films