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http://hdl.handle.net/10397/4414
| Title: | Upconversion luminescence of an insulator involving a band to band multiphoton excitation process | Authors: | Wang, J Hao, JH Tanner, PA |
Issue Date: | 6-Jun-2011 | Source: | Optics express, 6 June 2011, v. 19, no. 12, p. 11753-11758 | Abstract: | A multiphoton process to the conduction band of the insulator Er₂O₃ is reported, which occurs in vacuum under near infrared excitation. The enormous upconversion intensity is two orders of magnitude greater than that in air, and also the intensity ratio for green and red emission bands is inverted. The mechanism is probed by experiments of laser power dependence, cathodoluminescence, photoconductivity dependence and chemical dilution, and it involves cross-relaxation energy transfer upconversion of erbium ions to reach the conduction band. The upconversion color is tunable by changes in pressure, laser diode intensity and wavelength, or dopant ion concentration. | Keywords: | Conduction bands Electron mobility Energy transfer Erbium Quantum optics |
Publisher: | Optical Society of America | Journal: | Optics express | EISSN: | 1094-4087 | DOI: | 10.1364/OE.19.011753 | Rights: | © 2011 Optical Society of America. This paper was published in Optics express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/abstract.cfm?URI=oe-19-12-11753. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. |
| Appears in Collections: | Journal/Magazine Article |
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