Laser modulation dielectric properties of SBN:Ce ceremics using the Terahertz Time-Domain Spectroscopy

doi:10.11972/j.issn.1001-9014.2015.05.009

Home > Archive>Volume 34, Issue 5, 2015 >564-569. DOI:10.11972/j.issn.1001-9014.2015.05.009

Laser modulation dielectric properties of SBN:Ce ceremics using the Terahertz Time-Domain Spectroscopy
DOI:
                        10.11972/j.issn.1001-9014.2015.05.009
                    
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                        [cstr]
                    
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Affiliation:Ultrafast Laser Laboratory,Key Laboratory of Optoelectronic Information Technology of Ministry of Education,College of Precision Instrument and Optoelectronics Engineering,Tianjin University,Ultrafast Laser Laboratory,Key Laboratory of Optoelectronic Information Technology of Ministry of Education,College of Precision Instrument and Optoelectronics Engineering,Tianjin University,Ultrafast Laser Laboratory,Key Laboratory of Optoelectronic Information Technology of Ministry of Education,College of Precision Instrument and Optoelectronics Engineering,Tianjin University,Ultrafast Laser Laboratory,Key Laboratory of Optoelectronic Information Technology of Ministry of Education,College of Precision Instrument and Optoelectronics Engineering,Tianjin University,Ultrafast Laser Laboratory,Key Laboratory of Optoelectronic Information Technology of Ministry of Education,College of Precision Instrument and Optoelectronics Engineering,Tianjin University,Ultrafast Laser Laboratory,Key Laboratory of Optoelectronic Information Technology of Ministry of Education,College of Precision Instrument and Optoelectronics Engineering,Tianjin University,Ultrafast Laser Laboratory,Key Laboratory of Optoelectronic Information Technology of Ministry of Education,College of Precision Instrument and Optoelectronics Engineering,Tianjin University,Ultrafast Laser Laboratory,Key Laboratory of Optoelectronic Information Technology of Ministry of Education,College of Precision Instrument and Optoelectronics Engineering,Tianjin University
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Abstract:

The dielectric response of SBN:Ce ceremics modulating by the 532nm cw laser is investigated at room temperature by means of a terahertz time-domain spectroscopy. When the external laser field is imposed onto the SBN:Ce ceremics, the permittivity of the sample shows an appreciable modulation results, which the modulation depth reach up to 8.5% and the dielectric loss increases 15%, respectively. The experimental results show there is a linear dependency between the variation of refractive index |Δn| and the applied laser intensity. The photo-ferroelectric physical mechanisms of SBN:Ce ceramics can be attributed to the internal space field in the ceramics caused by the light excited free carries with the analytic models. The conclusion presents important references for design and selection of the teraherz tunable devices.

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CHEN Li-Wei, CHAI Lu, LI Yan-Feng, HU Ming-Lie, WANG Qing-Yue, TIAN Zhen, HAN Jia-Guang, ZHANG Wei-Li. Laser modulation dielectric properties of SBN:Ce ceremics using the Terahertz Time-Domain Spectroscopy[J]. Journal of Infrared and Millimeter Waves,2015,34(5):564~569

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Received:August 10,2014
Revised:November 06,2014
Adopted:December 05,2014
Online: November 30,2015
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