Optical switching based on magnetic resonance of split ring resonator array
-
摘要:We demonstrate an all-optical switching of the magnetic resonance properties associated with a metallic Split Ring Resonator(SRR) array. The periodically spaced elements are fabricated on a high-resistivity silicon wafer and probed by using conventional Terahertz(THz) time-domain spectroscopy. We use a continuous-wave laser diode to generate carriers in the gaps of the SRR elements. Using a sufficient power, this optical excitation can create an effective short gap, which would switch the resonant properties of the metamaterial from that of an SRR array to that of a closed ring resonator array and leads to dramatic changes in the THz transmission. In the present experiment, the optically induced switching is associated with the magnetic resonance. However, with appropriate changes in the device structure, this approach can be extended to switch a medium with a negative real index of refraction to a medium with a positive real index of refraction. This opens the way to creat a broad new range of active devices.Abstract:We demonstrate an all-optical switching of the magnetic resonance properties associated with a metallic Split Ring Resonator(SRR) array. The periodically spaced elements are fabricated on a high-resistivity silicon wafer and probed by using conventional Terahertz(THz) time-domain spectroscopy. We use a continuous-wave laser diode to generate carriers in the gaps of the SRR elements. Using a sufficient power, this optical excitation can create an effective short gap, which would switch the resonant properties of the metamaterial from that of an SRR array to that of a closed ring resonator array and leads to dramatic changes in the THz transmission. In the present experiment, the optically induced switching is associated with the magnetic resonance. However, with appropriate changes in the device structure, this approach can be extended to switch a medium with a negative real index of refraction to a medium with a positive real index of refraction. This opens the way to creat a broad new range of active devices.
-
Key words:
- optical switching/
- magnetic resonance/
- ring resonator array
-
[1] VESELAGO V G. The electrodynamics of substances with simultaneously negative values ofεandμ[J].Sov. Phys. Usp.,1968,10:509-514. [2] SMITH D R,PADILLA W J,VIER D C,et al.. Composite medium with simultaneously negative permeability and permittivity [J].Phys. Rev. Lett.,2000,84:4184-4187. [3] SHELBY R A,SMITH D R,SCHULTZ S. Experimental verification of a negative index of refraction [J].Science,2001,292:77-79. [4] SHALAEV V M,CAI W,CHETTIAR U K,et al.. Negative index of refraction in optical metamaterials [J].Opt. Lett.,2005,30:3356-3358. [5] BULU I,CAGLAYAN H,OZBAY E. Experimental demonstration of labyrinth-based left-handed metamaterials [J].Opt. Express,2005,13:10238-10247. [6] ZHANG S,FAN W,PANOIU N C,et al.. Experimental demonstration of near-infrared negative-index metamaterials [J].Phys. Rev. Lett.,2005,95:137404/1-4. [7] ZHOU J,ZHANG L,TUTTLE G,et al.. Negative index materials using simple short wire pairs [J].Phys. Rev. B,2006,73:041101/1-4. [8] PENDRY J B,HOLDEN A,ROBBINS D D,et al.. Magnetism from conductors and enhanced nonlinear phenomena [J].IEEE Trans. Microwave Theory Technol.,1999,47:2075-2084. [9] PENDRY J B,HOLDEN A,STEWART W,et al.. Extremely low frequency plasmons in metallic mesostructures [J].Phys. Rev. Lett.,1996,76:4773-4776. [10] KATSARAKIS N,KONSTANTINIDIS G,KOSTOPOULOS A,et al.. Magnetic response of split-ring resonators in the far-infrared frequency regime [J].Opt. Lett.,2004,30:1348-1350. [11] YEN T J,PADILLA W J,FANG N,et al.. Terahertz magnetic response from artificial materials [J].Science,2004,303:1494-1496. [12] LINDEN S,ENKRICH C,WEGENER M,et al.. Magnetic response of metamaterials at 100 terahertz [J].Science,2004,306:1351-1353. [13] KATSARAKIS N,KOSCHNY T,KAFESAKI M,et al.. Electric coupling to the magnetic response of split ring resonators [J].Appl. Phys. Lett.,2004,84: 2943-2945. [14] GRISCHKOWSKY D.Frontiers in Nonlinear Optics[M]. Philadelphia:Institute of Physics Publishing,1992. [15] SZE S M.Physics of Semiconductor Devices[M]. New York:Wiley,1981. [16] NUSS M C,ORENSTEIN J.Terahertz time-domain spectroscopy[M]. Berlin:Springer,1998. [17] HAN P Y,TANI M,USAMI M,et al.. A direct comparison between terahertz time-domain spectroscopy and far-infrared Fourier transform spectroscopy [J].J. Appl. Phys.,2001,89(4):2357-2359 -
点击查看大图
计量
- 文章访问数:4339
- HTML全文浏览量:434
- PDF下载量:1554
- 被引次数:0
下载:
