Optical switching in hydrogenated amorphous silicon–sulfur alloy prepared by glow discharge

Al-Dallal, S.; Henari, Fryad Z.; Al-Alawi, S.M.; Arekat, S.; Manaa, H.

doi:10.1016/j.jnoncrysol.2004.08.032

Cited by 5 publications

(5 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A UV-visible spectroscopy have been used to determine the optical properties of these three samples using absorption spectrum in the range of ( 300 -900) nm using a 6800 UV-visible spectrophotometer ( Jenway -England ) . Figure (1) shows the absorption spectrum of the three samples by drawing the absorbance ( A) against wavelength in the spectral range ( 300 -900) nm . The absorbance ( A) of all samples oils were used to determine the optical absorption coefficient ( α ) using the formula [21] :…”

Section: Experimental A)mentioning

confidence: 99%

“…d is the sample thickness . Table (1) shows calculated absorption coefficients , in the three laser beams wavelengths used in the experiments viz ., 473nm , 532nm and 635 nm using equation ( 1) and d= 1 mm . nm ( types SDL 473 -66 T , SDL 532 -100 T and SDL -050 T respectively ) , blue , green and red lights respectively .…”

Section: Experimental A)mentioning

confidence: 99%

“…Introduction: Materials with third-order optical nonlinearities have been investigated extensively for their applications in high density optical data storage, optical signal processing, optical computing ,optical phase conjugation ,high-speed all optical switches, optical bistability, optical limiting devices and other nonlinear optical (NLO)devices [1][2][3][4][5]. Selfinduced nonlinear index changes in different media are due generally to dispersive and absorptive effects respectively [6].These two branches are classified according to relation between incident laser beam frequency , ω , and the nearest transition in the medium .…”

mentioning

confidence: 99%

See 2 more Smart Citations

Write – Read all-Optical System Based on Diffraction Ring Patterns in Aloe, Cresson and Taramira Vegetable Oils.

Ali

Emshary

2019

University of Thi-Qar Journal

View full text Add to dashboard Cite

Multiple diffraction ring patterns appeared in Aloe , Cresson and Taramira oils under irradiation with cw blue (473 nm ) laser light beam . No ring patterns appeared in these oils using the green cw ( 532 nm) and red cw ( 635nm ) laser light beams . As a result of irradiation of these oils with the blue beam together with the green or with red beam or with both green and red beams together, blue and green , blue and red , and blue , green and red rings appeared respectively at very low input powers of the green and red beams . The number of rings produced by the green and red lights are totally controlled by the blue beam input power and not by their input powers . By this technique .we have established a write ( by the blue beam ) -Read ( by the green and red beams ) all optical system in these three oils .

show abstract

Section: Experimental A)mentioning

confidence: 99%

Section: Experimental A)mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Write – Read all-Optical System Based on Diffraction Ring Patterns in Aloe, Cresson and Taramira Vegetable Oils.

Ali

Emshary

2019

University of Thi-Qar Journal

View full text Add to dashboard Cite

show abstract

“…Sulphur and selenium are revealed to be among the most appropriate elements to form alloys with silicon of potential applications in optoelectronic devices [23,24]. Addition of sulphur or selenium to the amorphous silicon matrix to form a-Si x S 1-x H or a-Si x Se 1-x H alloys and the possibility of changing the composition gives rise to a wider range of properties of this material.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic and Optoelectronic Properties of Hydrogenated Amorphous Silicon-Chalcogen Alloys

Dallal¹

2015

Superalloys

View full text Add to dashboard Cite

Hydrogenated amorphous silicon-chalcogen alloy thin films have been the subject of growing interest during the past two decades. Thin films of these alloys are usually prepared by the decomposition of SiH 4 and H 2 S or H 2 Se gas mixtures in a radiofrequency plasma glow discharge at a substrate temperature of 250°C. The alloy composition is varied by changing the gas volume ratio R V = [chalcogen/ silane]. Infrared spectroscopy is used to explore the bonding structure of the alloy.The material exhibits hydrogen-induced bands, normally observed in a-Si:H spectra and other chalcogen-induced bands resulting from bonding chalcogen atoms with hydrogen and silicon. Analysis of the vibrational spectra of this material reveals the presence of significant levels of Si-chalcogen-SiH n configurations. Optical and electrical measurements show that increasing the chalcogen content results in an increase of the optical (Tauc) gap and a decrease in dark conductivity and photoconductivity. Subgap absorption measurements are employed to probe the Urbach energy and defect density. Upon increasing the chalcogen content, a broadening of band tails and an increase in defect density is observed. These results are shown to be consistent with photoluminescence measurements carried out on these materials.

show abstract

“…The S-bearing alloys are used as high-temperature materials, high temperature lubricants or surface materials in modern industrial application. Examples include Fe-S [13] , Ni-S [14 16] , C-S [17] , Si-S [18] , Fe-Ni-S [19] , Fe-Si-S [20] , Sn-S [21] , Ni-S-Co [22] , Ni-Cr-S [23] , Ni-Cr-Mo-S [24] , Ni-Fe-W-S [25] and Ni-Fe-W-P-S [26] . No natural S-bearing alloys have yet been reported.…”

mentioning

confidence: 99%

Discovery of Cu-Ni-Zn-Sn-Fe intermetallic compounds and S-bearing alloys in the Zhaishang gold deposit, southern Gansu Province and its geological significance

Liu

Guangjian

et al. 2008

Sci. China Ser. D-Earth Sci.

View full text Add to dashboard Cite

Examination of ores by optical microscope and EPMA from the Zhaishang gold deposit, southernGansu Province, has revealed an abundance of rare minerals. These include native metals, Cu-Ni-Zn-Sn-Fe polymetallic compounds and S-bearing alloys of Ni, Fe, Zn, Cu and Sn, occurring as native nickel, Zn-Cu alloy, Ni-Zn-Cu alloy, Sn-Zn-Ni-Cu alloy, Zn-Cu-Ni alloy, Zn-Fe-Cu-Sn-Ni alloy, Fe-Ni-S alloy, Sn-Fe-Ni-S alloy, Fe-Zn-Cu-Ni-S alloy, Zn-Ni-Cu-Fe-S alloy and others. Compared with the Zn-Cu alloy minerals discovered previously, these Zn-Cu minerals fall in the Į or D+E portion in Zn-Cu alloy phase diagram, and the Į portion has higher Cu content. Cu-Ni-Zn-Sn-Fe intermetallic compounds and S-bearing alloy minerals have not been previously reported in the literature. These rare alloys formed in a strongly reducing environment with absent oxygen and low sulfur activities.gold deposit, native metal, polymetallic compound, S-bearing alloy, geological significance, Gansu Ever since Fe-Ni and Fe-Ni-Co alloys were found by Melville [1] in Oregon, the native metals and their intermetallic compounds of Fe-group elements, PGE, W-Mo group elements and sulfurized ore-forming metals have been described in lunar rock, aerolite, granite, ophiolite, kimberlite, lamproite, gabbro-diabase, quartz diorite, volcanic tuff and ore deposits of chromite, diamonds, asbestos, porphyry copper, cobalt, Cu-Ni sulfides, REE, gold, the oxidized zone of sulfides and residual talus. As examples, large quantities of native metals and alloys (Cu 2 Zn, Cu 2 Ni ) are hosted by ophiolite in the Far-east Koryak plateau [2 4] ; PGEs and their alloys are hosted by ophiolite and chromite in Kempirsai, Kazakstan [5] ; PGEs and their alloys hosted by the ophiolite complex and alluvium in New Caledonia [6] ; abundant Fe group elements, PGEs and Cu-Zn intermetallic compounds hosted by the quartz gold deposit of Sukhol Log in Russia [7] ; the metallic films on diamond hosted by kimberlite and lamproite; and large quantities of native metals and various of alloys such as Cu, Sn, Fe, Zn, Ni-Fe, Fe-Sn, Cu-Zn, Cu 2 Zn, Cu 3 Zn 2 , Cu 3 Sn, Cu-Zn-Pb and Pb-SnCu(Au) hosted by ultramafic rock and chromite in the northern margin of Russian platform [8] ; the Cu-Zn and Cu-Sn alloys in the Sumatra placer in India [9] ; and more than 200 native metals and intermetallic compound minerals summarized by Makeev et al. [10] in Alpine ophiolites. In China, many reports about the study of native elements and intermetallic compound were published [11] . There have been many examples of native elements (Cu, Zn, Ni, Fe, Sn) and their intermetallic compounds from producing areas in China. They are hosted by various rocks as follows: (1) aerolite; (2)

show abstract

Optical switching in hydrogenated amorphous silicon–sulfur alloy prepared by glow discharge

Cited by 5 publications

References 10 publications

Write – Read all-Optical System Based on Diffraction Ring Patterns in Aloe, Cresson and Taramira Vegetable Oils.

Write – Read all-Optical System Based on Diffraction Ring Patterns in Aloe, Cresson and Taramira Vegetable Oils.

Spectroscopic and Optoelectronic Properties of Hydrogenated Amorphous Silicon-Chalcogen Alloys

Discovery of Cu-Ni-Zn-Sn-Fe intermetallic compounds and S-bearing alloys in the Zhaishang gold deposit, southern Gansu Province and its geological significance

Contact Info

Product

Resources

About