2006
DOI: 10.1002/crat.200510610
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Optical properties of pure and metal ions doped ammonium sulfate single crystals

Abstract: A study of the optical properties of pure-and some metal ions doped ammonium sulfate crystals (AS) were made. Optical constants of AS crystals were calculated at room temperature. The optical absorption coefficient (α) was analyzed and interpreted to be in the allowed direct transition. The introduction of Rb + or Cs + ions gives rise to an intense charge transfer band with a maximum at λ= 310 nm in the optical spectrum. In case of Cr 3+ -doping, the absorption shows a shoulder just before the onset band to ba… Show more

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Cited by 16 publications
(7 citation statements)
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“…Ultra-violet Diffused Re ectance Spectroscopic Analysis Furthermore, the ultra-violet diffused re ectance spectroscopic (UV-DRS-Shimadzu-UV-3600 plus) analysis has been performed to understand the optical properties of the title crystal at shocked conditions and the acquired pro les of optical transmittance of the control and shocked crystals are presented in Fig. 9a.The obtained optical transmittance spectrum of the control sample is well-matched with the previous reports [53,54]. At shocked conditions, there are considerable changes observed and especially at the 2nd shocked condition where signi cant reduction of optical transmittance is observed due to the formation of the distorted -Pnam crystal symmetry.…”
Section: Raman Spectroscopic Resultssupporting
confidence: 89%
“…Ultra-violet Diffused Re ectance Spectroscopic Analysis Furthermore, the ultra-violet diffused re ectance spectroscopic (UV-DRS-Shimadzu-UV-3600 plus) analysis has been performed to understand the optical properties of the title crystal at shocked conditions and the acquired pro les of optical transmittance of the control and shocked crystals are presented in Fig. 9a.The obtained optical transmittance spectrum of the control sample is well-matched with the previous reports [53,54]. At shocked conditions, there are considerable changes observed and especially at the 2nd shocked condition where signi cant reduction of optical transmittance is observed due to the formation of the distorted -Pnam crystal symmetry.…”
Section: Raman Spectroscopic Resultssupporting
confidence: 89%
“…The control and shocked AS samples’ optical transmittance profiles are presented in Figure a, which can provide supporting evidence for the reduction of grain boundary density and enhancement of the net degree of crystalline nature of the test sample. The control sample’s optical transmittance spectrum is found to be well-matched with the previously reported AS samples …”
Section: Results and Discussionsupporting
confidence: 77%
“…5 by extrapolating the linear portion of the plot to (αhν) 2 = 0. These values are comparable to those for BLT, BT, PZT and BST thin films [9,10,18,[20][21][22].…”
Section: Optical Propertiessupporting
confidence: 79%
“…The decrease in the band gap resulting from doping may be due to the changes in the defect concentration present in the structure [14,22]. Changes in the degree of disorder and defects present in a film may be due to several factors such as doping, heat treatment and radiation energy.…”
Section: Optical Propertiesmentioning
confidence: 99%