Observation of bistable upconversion emission in Tm,Yb codoped yttria nanocrystal

Li, L.; Li, H.; Zhang, X. L.; Peng, Yutao; Nie, Mengyan; Jiang, Bo; Zhang, X. W.; Li, R. M.

doi:10.1117/12.869817

Cited by 2 publications

(4 citation statements)

References 19 publications

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“…Note that in our observation of the upconversion bistability, one of the most importance features is the clockwise bistability cycle showing that the upconversion emission intensity at decreasing pump power is lower than that at increasing pump power. It is dramatically different from the previous observations in Yb,Er and Yb,Tm doped systems exhibiting the counterclockwise bistability loops [14,15]. This implies a different physical mechanism responsible for the intrinsic bistability effect of Yb-sensitized Tm upconversion emission in new matrix of ZrO 2 nanocrystals.…”

Section: Bistability Emission and Upconversion Spectracontrasting

confidence: 77%

“…Under the excitation of 973 nm diode laser, the dependence of the Tm 3+ upconversion emission intensity on the pump power shows distinct optical bistability behavior. One of the notable features, different from the previous observations in Yb/Er and Yb/Tm systems [12][13][14][15], is the clockwise cycle bistability loop showing that the upconversion emission intensity at decreasing pump power is lower than that at increasing pump power. The possible physical mechanism of the abnormal strong bistability effect is discussed taking into account the strong pump-induced local thermal loading.…”

Section: Introductioncontrasting

confidence: 62%

“…Moreover, the strong bistability hysteresis has much larger bistable domain and much higher switching contrast than the previous results of Yb,Tm codoped Gd 2 O 3 and Y 2 O 3 Nanophosphors [14,15]. These excellent properties make the intrinsic bistability of Tm,Yb:ZrO 2 nanocrystal more suitable for the relevant application in optical communications.…”

Section: Bistability Emission and Upconversion Spectramentioning

confidence: 45%

“…Recently, the first observation of bistable energy transfer between different rare-earth ions was reported in Yb, Er doped CsCdBr 3 single crystals at cryogenic cooling temperatures, which is responsible for the interesting bistable charomatic switching [12]. The new systems of Yb, Tm codoped solids were also exploited to perform intrinsic bistability of luminescence but with weak nonlinear optical hysteresis [13][14][15].…”

Section: Introductionmentioning

confidence: 97%

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Intrinsic bistability effect of Yb-sensitized Tm upconversion emission in zirconium dioxide nanocrystal

et al. 2012

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Intrinsic bistability in active optical compounds doped with rare-earth ions has attracted widespread interest because of its relevance for optical signal switching and routing. In this paper, room temperature strong bistability effect of Ybsensitized Tm upconversion emission is reported in zirconium dioxide nanocrystal host matrix under infrared diode laser irradiation. The distinct optical bistability behavior is simultaneously observed in three emission bands of Tm ion around 480, 650/680 and 800 nm which are assigned to the radiative transitions of 1 G respectively. The bistability loops exhibit uniformly clockwise cycle characterized by a relatively lower trace of emission intensity at decreasing pump power than the trace at increasing pump power. Multiphoton upconversion processes are analyzed to determine the Yb→Tm energy transfer mechanism. Such strong bistability effect is associated with thermally enhanced nonradiative decay and reduced luminescence quantum yield due to the strong pump-induced local thermal loading.

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Section: Bistability Emission and Upconversion Spectracontrasting

confidence: 77%