Optical Transmission and Photoconductive and Photovoltaic Effects in Activated and Unactivated Single Crystals of ZnS

1958 ◽  
Vol 111 (1) ◽  
pp. 98-102 ◽  
Author(s):  
George Cheroff ◽  
Seymour P. Keller
2003 ◽  
Vol 37 (6) ◽  
pp. 641-645 ◽  
Author(s):  
A. A. Vaipolin ◽  
Yu. A. Nikolaev ◽  
I. K. Polushina ◽  
V. Yu. Rud’ ◽  
Yu. V. Rud’ ◽  
...  

2009 ◽  
Vol 105 (8) ◽  
pp. 083110 ◽  
Author(s):  
Na Zhou ◽  
Kun Zhao ◽  
Hao Liu ◽  
Zhiqing Lu ◽  
Hui Zhao ◽  
...  

2010 ◽  
Vol 19 (7) ◽  
pp. 077801
Author(s):  
Li Xiao-Ming ◽  
Wang Fang ◽  
Zhao Kun ◽  
Zhao Song-Qing

Author(s):  
Александра Ивановна Иванова ◽  
Кристина Александровна Мариничева ◽  
Сергей Андреевич Третьяков ◽  
Алексей Михайлович Иванов ◽  
Сергей Вячеславович Молчанов ◽  
...  

Проведены исследования оптического пропускания в диапазоне длин волн 2 - 14 мкм монокристаллов германия, легированных донорными и акцепторными примесями (удельное сопротивление германия 1 - 3 Ом⋅см), в интервале температур от 86 К до 523 К. Рассчитаны значения коэффициентов ослабления α для исследуемых кристаллов; минимальные значения коэффициентов ослабления (0,0015 - 0,0231 см) в интервале температур от 86 К до 323 К характерны для монокристаллов германия, легированных сурьмой, в диапазоне 2 - 11 мкм. Исследования показали, что низкие значения α и коэффициента пропускания на длине волны 3,39 мкм для кристаллов Ge: Sb и Ge: Bi позволяют применять эти низкоомные кристаллы германия для газовых гелий-неоновых лазеров при температурах от 86 К до 323 К. Исследованы температурные изменения геометрии поверхности кристалла на наноразмерном уровне. Показано, что нагрев кристаллического германия приводит к увеличению диффузного отражения излучения от поверхности. Сделан вывод о возможности использования низкоомных кристаллов германия, легированных сурьмой, в качестве элементов инфракрасной оптики в интервале температур 86 - 373 К. In this work, we investigated optical transmission in the wavelength range of 2-14 μm of low-resistance germanium crystals (1 - 3 Ω⋅cm) doped with donor and acceptor impurities in the temperature range from 86 K to 523 K. The values of the attenuation coefficients for investigated crystals are obtained. Minimum attenuation coefficients α of 0,0015 - 00231 cm in the temperature range from 86 K to 323 K are characteristic for germanium single crystals doped with antimony in the range 2,1-11 μm. Studies have shown that the low values of α and the transmittance at a wavelength of 3,39 pm for Ge: Bi and Ge: Sb crystals make it possible to use these low-resistance germanium crystals for gas helium-neon lasers at temperatures from 86 K to 323 K. The temperature changes in the geometry of the crystal surface are investigated at the nanoscale level. It is shown that heating crystalline germanium leads to an increase in the diffuse reflection of radiation from the surface. The possibility of using the low-resistance germanium crystals doped with antimony as elements of infrared optics in the temperature range 86 - 373 K has been demonstrated.


1982 ◽  
Vol 60 (5) ◽  
pp. 588-595 ◽  
Author(s):  
A. D. Bandrauk ◽  
K. D. Truong ◽  
C. Carlone

Optical transmission and reflection measurements are reported for the quasi one dimensional solids perylene-TCNQ (P1T1) and (perylene)3-TCNQ (P3T1) in the region from 300 to 1200 nm. Raman spectra of single crystals of both compounds were obtained from 20 to 3000 cm−1. With 457.9 nm excitation, combinations and overtones of perylene are observed for the first time. A complete Raman spectrum of perylene and its deuterated homologue including librations is thus obtained via selective resonance enhancement of that molecule.


2014 ◽  
Vol 37 (2) ◽  
pp. 165-172 ◽  
Author(s):  
Mostak Hossain ◽  
Shahan Ara Begum ◽  
Jiban Podder

Single crystals of pure potassium acid phthalate (KAP) and magnesium-cobalt (Mg2+-Co2+) co-doped potassium acid phthalate crystals were grown by an isothermal evaporation method. Optically transparent and coloured KAP single crystals were grown by doping divalent bimetallic impurities. Enhancement of the metastable zonewidth was achieved by the addition of co-doped bimetallic impurities in KAP solution. It is anticipated that these larger cations play a vital role in the growth mechanism and it favours to reduce the formation of secondary nucleation by positioning the doped metal ions into the interstitial sites. The XRD results confirm that the incorporation of bimetallic ions into the KAP crystal lattice. The optical transmission is found to decrease in Mg-Co doped crystals compared to that of pure KAP. DOI: http://dx.doi.org/10.3329/jbas.v37i2.17557 Journal of Bangladesh Academy of Sciences, Vol. 37, No. 2, 165-172, 2013


2012 ◽  
Vol 584 ◽  
pp. 60-64
Author(s):  
S. Vetrivel ◽  
R. Rajasekaran

Single Crystals of 20% of Zinc doped L- Proline Cadmium chloride [Zn(20M):LPCC] and 40% of Zinc doped L-Proline Cadmium chloride[Zn(40M):LPCC]were successfully grown from aqueous solution by slow evaporation method at room temperature. The grown crystals of [Zn(20M):LPCC] and [Zn(40M):LPCC] have dimensions 47x14x3.7 mm3 and 36x9.5x4.2 mm3 respectively. The single crystal XRD, powder XRD patterns were recorded and indexed for crystalline nature of grown materials. The presence of functional group has been confirmed by FTIR analysis. The optical transmission spectrum has been recorded in wavelength region 100nm to1000nm.The thermal properties were studied by TGA/DTA. The second harmonic generation (SHG) was carried out and it reveals the NLO property of the crystals. The electrical properties were studied by dielectric studies.


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