Near-infrared photoluminescence spectra in Bi-doped CsI crystal: evidence for Bi-valence conversions and Bi ion aggregation

Su, Liangbi; Zhao, Hengyu; Liu, Hongjun; Zheng, Lihe; Fan, X.W.; Jiang, Xiantao; Tang, Huili; Ren, Guohao; Xu, Jun; Ryba‐Romanowski, W.; Lisiecki, Radosław; Solarz, P.

doi:10.1364/ome.2.000757

Cited by 38 publications

(34 citation statements)

References 34 publications

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“…% Bi-doped CsI single crystal only showed luminescence at around 1216 nm attributed to Bi þ ions, while an additional emission band at 1560 nm originating from Bi 2 þ cluster ions could be observed in higher concentrations of Bi-doped CsI crystal. 47 It is rational to conclude that our concentration dependent luminescence here can also be related to bismuth clusters or cluster ions. Inert atmosphere is benefit for the generation of NIR active centers.…”

Section: Resultsmentioning

confidence: 78%

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Multifunctional tunable ultra-broadband visible and near-infrared luminescence from bismuth-doped germanate glasses

Zhou

Tan

et al. 2013

Journal of Applied Physics

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Here, we present three facile approaches to achieve wavelength tunable luminescence in the same host material with single dopant, i.e., by modulating doping level, preparation temperature, and atmosphere. Based on these methods, ultra-broadband tunable near-infrared luminescence with the largest full width at half maximum of about 500 nm covering the whole windows of optical communication has been obtained in bismuth-doped germanate glasses. Wavelength tunable luminescence is also observed with the change of excitation wavelength. Systematical strategy was followed to approach the physical origin of the near-infrared luminescence and we proposed that three different bismuth active centers contribute to the near-infrared luminescence in the germanate glasses. A comprehensive explanation for the tunable luminescence is given, combining the concentration, energy transfer, and chemical equilibrium of these active centers in the glasses. With the increase of melting temperatures and the increase of reducing extent of the preparation atmosphere, bismuth species transform from Bi 3þ to Bi 2þ , Bi þ , Bi 0 and bismuth clusters, and then to bismuth colloid. Of particular interest is that red tunable luminescence was also observed by modulating doping level, preparation atmosphere, and excitation wavelength. Besides, the trapped-electron centers in germanate glasses can interact with bismuth species of high valence states leading to the formation of bismuth active centers of low valence states and the decrease of trapped-electron centers. This tunable ultra-broadband luminescence is helpful for a better understanding of the origin of the near-infrared luminescence in Bi-doped glasses and may have potential applications in varieties of optical devices. V C 2013 American Institute of Physics. [http://dx

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Section: Resultsmentioning

confidence: 78%

“…As there is no signal at g ¼ 2.0086, Bi 2 þ can also be excluded in our glasses. 47 The undoped glass shows a signal at g ¼ 1.993. This signal is attributed to GeO 4 À trapped-electron centers which comes from electrons trapped on the GeO 4 0 units.…”

Section: -4mentioning

confidence: 99%

Multifunctional tunable ultra-broadband visible and near-infrared luminescence from bismuth-doped germanate glasses

Zhou

Tan

et al. 2013

Journal of Applied Physics

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“…Univalent bismuth impurity, observed in several chloride [6][7][8][9][10], iodide [18,19] and nonhalide crystal phases [11,[20][21][22][23][24][25], represents the simplest form of NIR photoluminescent subvalent bismuth center. It possesses the 6p 2 open shell electronic configuration with the 3 P 0 ground state and 3 P 1 , 3 P 2 low lying excited states.…”

Section: Introductionmentioning

confidence: 99%

“…Due to a large estimated Bi + ionic radius it is believed that it can isomorphically substitute the heavy alkali cations (K + , Rb + , Cs + ) [27], and, in fact, several alkali-bearing halide phases (RbPb 2 Cl 5 , KAlCl 4 , KMgCl 3 , CsCdCl 3 , CsI) containing Bi + impurity center were prepared and display the long-lived broadband NIR PL [6][7][8][9][10]18,19]. While the optical characteristics of Bi + in all the studied ternary chloride phases were similar with the excitation spectra having two maxima in the orange-red region of spectrum and broad photoluminescence band with a maximum at 900-1030 nm (at 300 K), the corresponding properties of the bismuth-doped CsI were rather different.…”

Section: Introductionmentioning

confidence: 99%

NIR photoluminescence of bismuth-doped CsCdBr3 – The first ternary bromide phase with a univalent bismuth impurity center

Romanov

Veber

Vtyurina

et al. 2015

Journal of Luminescence

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“…But, the near-infrared (NIR) emission band of REdoped films is narrow, severely limiting further development of optical communication. Fortunately, Bi-doped materials with broadband NIR luminescence covering the whole optical communication region are emerging [5][6][7][8]. Recently, various types of Bi-doped fiber lasers and amplifiers have been demonstrated in 1150~1550 nm region [9].…”

Section: Introductionmentioning

confidence: 99%

Ultra-broadband infrared luminescence of Bi-doped thin-films for integrated optics

Xu¹,

Hao²,

Zhou³

et al. 2013

Opt. Express

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Ultra-broadband infrared luminescence has been observed in bismuth (Bi)-doped germanate thin-films prepared by pulsed laser deposition. The films are compatible with various types of substrates, including conventional dielectrics (LaAlO 3 , silica) and semiconductors (Si, GaAs). The emission peak position of the films can be finely tuned by changing oxygen partial pressure during the deposition, while the excitation wavelength locates from ultra-violet to near-infrared regions. The physical mechanism behind the observed infrared luminescence of the Bi-doped films, differing from that of the as-made glass, is discussed. ©2013 Optical Society of America

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Near-infrared photoluminescence spectra in Bi-doped CsI crystal: evidence for Bi-valence conversions and Bi ion aggregation

Cited by 38 publications

References 34 publications

Multifunctional tunable ultra-broadband visible and near-infrared luminescence from bismuth-doped germanate glasses

Multifunctional tunable ultra-broadband visible and near-infrared luminescence from bismuth-doped germanate glasses

NIR photoluminescence of bismuth-doped CsCdBr3 – The first ternary bromide phase with a univalent bismuth impurity center

Ultra-broadband infrared luminescence of Bi-doped thin-films for integrated optics

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