Magnetic-field-induced optical bistability in multifunctional Gd2O3:Er3+∕Yb3+ upconversion nanophosphor

Sunil K. Singh; Kaushal Kumar; Manish K. Srivastava; Devendra K. Rai; Shyam B. Rai

doi:10.1364/OL.35.001575

Magnetic-field-induced optical bistability in multifunctional ${Gd}_{2} O_{3} : {Er}^{3 +} ∕ {Yb}^{3 +}$ upconversion nanophosphor

Sunil K. Singh, Kaushal Kumar, Manish K. Srivastava, Devendra K. Rai, and Shyam B. Rai

Optics Letters
Vol. 35,
Issue 10,
pp. 1575-1577
(2010)
•https://doi.org/10.1364/OL.35.001575

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Sunil K. Singh, Kaushal Kumar, Manish K. Srivastava, Devendra K. Rai, and Shyam B. Rai, "Magnetic-field-induced optical bistability in multifunctional Gd₂O₃:Er³⁺∕Yb³⁺ upconversion nanophosphor," Opt. Lett. 35, 1575-1577 (2010)

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Table of Contents Category
- Nonlinear Optics
Optics & Photonics Topics
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The topics in this list come from the OSA Optics and Photonics Topics applied to this article.
Previously assigned OCIS codes
- Lasers and laser optics (140.0140)
- Bistability (190.1450)
- Upconversion (190.7220)

About this Article
History
- Original Manuscript: January 13, 2010
- Revised Manuscript: March 20, 2010
- Manuscript Accepted: April 6, 2010
- Published: May 5, 2010

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Abstract

The effect of an external magnetic field $(0 - 1 T)$ on the upconversion emission $(λ_{exc} = 976 nm)$ of ${Gd}_{2} O_{3} : {Er}^{3 +} ∕ {Yb}^{3 +}$ nanocrystalline phosphor has been studied. Optical bistability (hysteresis behavior in the intensity of the optical emission) for different transitions of the ${Er}^{3 +}$ ion has been observed for a complete cycle of the magnetic field between 0 and $1 T$ . The phosphor shows paramagnetic behavior, consistent with the presence of ${Gd}^{3 +}$ ions, at room temperature. Interaction between induced magnetization in the ${Gd}_{2} O_{3}$ host and the intrinsic magnetic moment of the nanosized clusters of ${Er}^{3 +}$ and ${Yb}^{3 +}$ ion pairs is proposed to be responsible for the hysteresis behavior.

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