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Applied Spectroscopy Reviews Volume 50, 2015 - Issue 9
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Review About the Optical-Controlled Terahertz Waves Modulator

Yang BaiSchool of Optical-Electrical and Computer Engineering, The Shanghai Key Lab of Modern Optical System, Engineering Research Center of Optical Instrument and System of the Ministry of Education, Institute of Optical-Electrical Information, University of Shanghai for Science and Technology, Shanghai, China
,
Ting BuSchool of Optical-Electrical and Computer Engineering, The Shanghai Key Lab of Modern Optical System, Engineering Research Center of Optical Instrument and System of the Ministry of Education, Institute of Optical-Electrical Information, University of Shanghai for Science and Technology, Shanghai, China
,
Kejian ChenSchool of Optical-Electrical and Computer Engineering, The Shanghai Key Lab of Modern Optical System, Engineering Research Center of Optical Instrument and System of the Ministry of Education, Institute of Optical-Electrical Information, University of Shanghai for Science and Technology, Shanghai, ChinaCorrespondence[email protected]
&
Songlin ZhuangSchool of Optical-Electrical and Computer Engineering, The Shanghai Key Lab of Modern Optical System, Engineering Research Center of Optical Instrument and System of the Ministry of Education, Institute of Optical-Electrical Information, University of Shanghai for Science and Technology, Shanghai, China
Pages 707-727 | Published online: 07 Aug 2015
 
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Abstract

A review of optical-controlled modulators in terahertz regime is presented. Regular semiconductor materials and organic materials at the terahertz frequencies enable fascinating modulation behaviors, including frequency shift and phase and amplitude modulation, observed in devices of subwavelength dimensions. Modulation enhancement was realized by changing the carrier concentration of the local or whole surface in arrays of various structure cells involved with split-ring resonators, holes, and apertures. We also illustrate some new methods to realize modulation for electromagnetic waves. Optical-controlled modulators and the novel manipulation methods will find amazing applications in terahertz communication, imaging, and sensing.

Acknowledgments

We thank Professors Y. M. Zhu and B. Cai for their help.

Funding

This work is partly supported by the Leading Academic Discipline Project of Shanghai Municipal Government (S30502), National Natural Science Foundation of China (61205095), Shanghai Young College Teacher Develop funding schemes (slg11006), the Key Scientific and Technological Project of Science and Technology Commission of Shanghai Municipality (2012YQ140005), and the Innovation Fund Project for Graduate Student of Shanghai (JWCXSL1402).

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