By Saroj Rout, Sameer Sonkusale
This ebook covers the theoretical historical past, experimental tools and implementation info to engineer for verbal exchange and imaging software, terahertz units utilizing metamaterials, in mainstream semiconductor foundry methods. This ebook will supply engineers and physicists an authoritative connection with build such units with minimum historical past. The authors describe the layout and development of electromagnetic (EM) units for terahertz frequencies (108-1010 cycles/sec) utilizing man made fabrics which are a fragment of the wavelength of the incident EM wave, leading to an effective electric and magnetic houses (permittivity and permeability) which are unavailable in ordinary materials.
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Extra info for Active Metamaterials: Terahertz Modulators and Detectors
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For a left-handed material (LHM), the constitutive parameters satisfy r D ei ; 2 . =2; r D ei ; 2 . 20) and now the refractive index can be expressed as nD p r r =2 i D ei =2 e p and causality requires the imaginary part of the each nD. 0 r C i r00 /. 22) where r0 D cos . =2/, r00 D sin . =2/, 0r D cos =2 and 00r D sin =2 . If the real part of each of the complex quantity in Eq. 22) goes to zero, the positive imaginary values result in a real n < 0. 23) A detailed derivation of it can be found in [11, 12].
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