Transient optical modulation properties in the terahertz metamaterial of split ring resonators

doi:10.1088/1674-1056/21/5/058701

Abstract The ultrafast optical modulation properties of split ring resonators are characterized by utilizing optical pump--terahertz probe spectroscopy. The experimental results show that when the terahertz electric vector is perpendicular to the gap of the split ring resonator, resonant absorption can be quenched significantly under high pump excitation. However, when the terahertz electric vector is parallel to the gap, the resonant absorption is less sensitive to pump excitation due to the structural properties of the metamaterial. Our numerical simulations also demonstrate that the pump pulse significantly influences the split ring resonator current by generating carriers in the substrate.

Keywords: terahertz carrier dynamics ultrafast spectra

Received: 31 July 2011
Revised: 27 April 2012
Accepted manuscript online:

PACS:	87.50.U-
	98.58.Ay	(Physical properties (abundances, electron density, magnetic fields, scintillation, scattering, kinematics, dynamics, turbulence, etc.))
	78.47.J-	(Ultrafast spectroscopy (<1 psec))

Fund: Project supported by the National Basic Research Program of China (Grant No. 2007CB310408), the National Natural Science Foundation of China (Grant Nos. 10804077, 10904098 and 11011120242), the Beijing Municipal Commission of Education, China (Grant No. KM200910028006), the Foundation for Key Program of Ministry of Education, China (Grant No. 210002), the Beijing Nova Program, and the Funding Project for Academic Human Resources Development in Institutions of Higher Learning Under the Jurisdiction of Beijing Municipality, China.

Cite this article:

Zhou Qing-Li(周庆莉), Shi Yu-Lei(施宇蕾), Wang Ai-Hua(王爱华), Li Lei(李磊), and Zhang Cun-Lin(张存林) Transient optical modulation properties in the terahertz metamaterial of split ring resonators 2012 Chin. Phys. B 21 058701

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Transient optical modulation properties in the terahertz metamaterial of split ring resonators

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