Multifunctional Bismuth‐Doped Nanoporous Silica Glass: From Blue‐Green, Orange, Red, and White Light Sources to Ultra‐Broadband Infrared Amplifiers

Zhou, Shifeng; Jiang, Nan; Zhu, Bin; Yang, Hucheng; Ye, Song; Lakshminarayana, G.; Hao, Jianhua; Qiu, Jianrong

doi:10.1002/adfm.200701290

Cited by 274 publications

(163 citation statements)

References 38 publications

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“…In contrast to such rare earth ions, the hallmark of transition metal ions is that the electrons in their outermost d orbital strongly interact with their ligands and that the electronic configuration of the activation ions is affected strongly by the arrangement of surrounding ligands. 23,25 By increasing the quantity of surrounding ligands and by shortening the distances between TM ions and ligands, the crystal field strength of TM ions can be increased. As a result, energy level splitting increases, which results in a shift in emission wavelength.…”

Section: Characterizationmentioning

confidence: 99%

Tailoring of the trap distribution and crystal field in Cr3+-doped non-gallate phosphors with near-infrared long-persistence phosphorescence

Chen

et al. 2015

NPG Asia Mater

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134

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We present a series of efficient near-infrared (NIR) Cr 3+ -doped non-gallate long-persistence phosphors (Zn 2 SnO 4 : Cr and Zn (2-x) Al 2x Sn (1-x) O 4 : Cr) and highlight their special optical characteristics of broad emission band (650-1200 nm, peaking at 800 nm) and long afterglow duration (435 h). In the context of materials selection, these systems successfully avoid the existing ubiquitous reliance on gallates as hosts in Cr 3+ -doped phosphorescent phosphors. Zn 2 SnO 4 is employed as a host to take advantage of its characteristic inverse spinel crystal structure, easy substitution into Zn 2+ and Sn 4+ sites by Cr 3+ in distorted octahedral coordination and non-equivalent substitution. In this work, Al dopant was introduced both to precisely tailor the local crystal field around the activator center, Cr 3+ , and to redeploy trap distribution in the system. Indeed, such redeployment permits band gap adjustment and the dynamic variation of the annihilation and the formation of defects. The results demonstrate that the method employed here can be an effective way to fabricate multi-wavelength, low-cost, NIR phosphorescent phosphors with many potential multifunctional bio-imaging applications.

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Section: Characterizationmentioning

confidence: 99%

Tailoring of the trap distribution and crystal field in Cr3+-doped non-gallate phosphors with near-infrared long-persistence phosphorescence

Chen

et al. 2015

NPG Asia Mater

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134

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“…Nevertheless, it is well known that the emission and amplification of the RE cover separately the O-, E-, S-, C-, L-and U-bands. The enhancement of the amplification bandwidth is thus a current challenge and several approaches have been explored in view to achieve optical amplification covering the entire telecommunication window by: (i) doping glass with metal ions such as Bismuth [5][6][7] or Nickel [8]; (ii) generating supercontinuum light in highly non-linear optical fiber [9][10][11] and (iii) co-doping glass with RE ions [12][13][14]. For the latter, tellurite host glass are usually preferred own to its properties cited above.…”

Section: Introductionmentioning

confidence: 99%

Expanding broadband emission in the near-IR via energy transfer between Er3+–Tm3+ co-doped tellurite-glasses

Rivera

El-Amraoui

Ledemi

et al. 2014

Journal of Luminescence

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“…Based on above results, the probable energy transfer mechanism in Bi-Tm-codoped glass can be proposed. Here we ascribe the origin of the luminescence to "active bismuth," e.g., Bi + [15]. The energy levels of Bi-related centers were proposed based on energymatching conditions [7,8].…”

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Enhanced broadband near-infrared emission and energy transfer in Bi-Tm-codoped germanate glasses for broadband optical amplification

et al. 2009

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Bi-Tm-codoped, and Tm-and Bi-singly doped germanate glasses were prepared, and their luminescent properties were investigated. Intense broadband near-IR emission with FWHM of 300 nm was observed in the Bi-Tm codoped glass. The emission intensity of Tm 3+ : 3 H 4 -13 F 4 and 3 F 4 -13 H 5 transitions in the BiTm-codoped glass was highly increased and reduced, respectively. The fluorescence lifetime of Tm 3+ at 1470 nm increased from 204 s to 301 s after codoping. These should be due to the efficient energy transfer from Bi-related centers to Tm 3+ ions. The highest energy transfer efficiency is estimated to be ϳ50%. OCIS codes: 160.2540, 300.6280, 250.5230. Owing to the rapid development of computer network and optical telecommunication, the wavelength division multiplexing (WDM) system demands fiber amplifiers with broader and more efficient gain bandwidth in the telecommunication windows. Although Er 3+ -doped fiber amplifier (EDFA) is available, its bandwidth is limited in silicate hosts to a maximum of 40 nm at the C band. Based on the bandwidth expansion of conventional EDFA at the C band by optical amplification at the S band of Tm 3+ -doped optical fibers (TDFA) [1], Er 3+ -Tm 3+ -codoped glasses were proposed for the broadband amplification in the S + C bands [2,3]. However, the bandwidth of all these rare-earth-doped glasses cannot cover the whole low-loss optical fiber transmission window ͑1270-1600 nm͒. © 2009 Optical Society of AmericaRecently, Bi-doped glasses with broadband near-IR (NIR) luminescent properties have been extensively studied [4][5][6][7][8][9][10][11][12][13][14]. Among them, germanate glasses are particularly attractive because of their efficient luminescence [6]. Optical amplification in 1272-1348 nm and 1430-1495 nm wavelength ranges has been demonstrated in Bi-doped germanate glasses [11,12] and silicate fibers [13], respectively. Broadband optical amplification covering 1270-1600 nm wavelength region was also reported in Bi-doped germanate glasses, although rapidly decreased optical gain has to be accepted with the increment of signal wavelength, since there is a strong resemblance between the wavelength-dependent optical gain and fluorescence spectrum [14].For practical application in the WDM system, the materials with efficient and flat amplification characteristic are necessary, since gain excursion over the whole spectral width can be minimized. Based on our earlier studies, it is possible to obtain ultrabroadband emission through codoping bismuth with Tm 3+ .However, to our knowledge, there is no related report until now. In this Letter, we report on broadband NIR luminescence properties in Bi-Tm-codoped barium alumino-germanate glasses. The emission with an FWHM of 300 nm ͑1270-1570 nm͒ covering the whole O, E, S, C, and L bands was observed. The emission intensity of Tm 3+ : 3 H 4 -3 F 4 is highly increased by efficient energy transfer from bismuth ions to Tm 3+ . Glasses with an initial reagents ratio composition of 62GeO 2 -15.0Al 2 O 3 -11.8BaO -11.2Na 2 O -xTm 2 O 3...

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Multifunctional Bismuth‐Doped Nanoporous Silica Glass: From Blue‐Green, Orange, Red, and White Light Sources to Ultra‐Broadband Infrared Amplifiers

Cited by 274 publications

References 38 publications

Tailoring of the trap distribution and crystal field in Cr3+-doped non-gallate phosphors with near-infrared long-persistence phosphorescence

Tailoring of the trap distribution and crystal field in Cr3+-doped non-gallate phosphors with near-infrared long-persistence phosphorescence

Expanding broadband emission in the near-IR via energy transfer between Er3+–Tm3+ co-doped tellurite-glasses

Enhanced broadband near-infrared emission and energy transfer in Bi-Tm-codoped germanate glasses for broadband optical amplification

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