Li Chenlong, Feng Lishuang, Zhou Zhen, Sui Jiawei, Yin Bohao. Optical-control terahertz modulator based on subwavelength metallic hole arrays[J]. Infrared and Laser Engineering, 2014, 43(12): 4013-4016.
| Citation:
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Li Chenlong, Feng Lishuang, Zhou Zhen, Sui Jiawei, Yin Bohao. Optical-control terahertz modulator based on subwavelength metallic hole arrays[J]. Infrared and Laser Engineering, 2014, 43(12): 4013-4016.
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Optical-control terahertz modulator based on subwavelength metallic hole arrays
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Li Chenlong1,2
,
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Feng Lishuang1,2
,
,
,
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Zhou Zhen1,2
,
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Sui Jiawei1,2
,
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Yin Bohao1,2
- 1.
Key Laboratory on Inertial Science and Technology,Beihang University,Beijing 100191,China;
- 2.
Precision Opto-mechatronics Technology Key Laboratory of Education Ministry,Beihang University,Beijing 100191,China
- Received Date: 2014-04-05
- Rev Recd Date:
2014-05-09
- Publish Date:
2014-12-25
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Abstract
Terahertz modulator plays an important role in the development of terahertz technology. Optical transmission efficiency of subwavelength metallic hole arrays can be much higher because of the excitation of surface plasmon polaritons, and a higher modulation depth could be obtained by using this structure. A terahertz modulator based on subwavelength metallic hole arrays controlled by optical pump was demonstrated. Firstly, the principles of our sample were researched. Secondly, two -dimensional subwavelength metallic hole arrays were fabricated on semi -insulating GaAs substrate. Lastly, utilizing the terahertz time domain spectroscopy system, the transmission of terahertz radiation through subwavelength hole arrays was measured. Experimental results show that extraordinary optical transmission is excited by subwavelength hole arrays, and optically pumping reduces the terahertz transmission. A higher modulation depth is obtained at special frequency. This research can be the reference to the design and fabrication of terahertz modulator with high modulation depth.
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