Negative Refraction and Focusing of Circularly Polarized Waves in Optically Active Media

Abstract

Analysis indicates that certain types of optically active media are capable of producing negative refraction and focusing of circularly polarized waves. It is established that a slab of such material acts just as Veselago's hypothetical left-handed media lens, providing subwavelength resolution as Sir Pendry's ideal lens, but for circularly polarized waves.

Exotic Characteristics of Power Propagation in the Chiral Nihility Fiber

“…Recently, theoretical and experimental studies have shown that chiral metamaterials can achieve negative refractive index (NRI) because of its chirality [25][26][27][28][29][30][31][32][33][34][35][36]. NRI chiral metamaterials can also be used as a "perfect lens", but for circularly polarized waves [29,30].…”

“…NRI chiral metamaterials can also be used as a "perfect lens", but for circularly polarized waves [29,30]. The unusual characteristics of guided and surface modes in chiral negative refraction slab [37,38], grounded slab [39] and parallelplate waveguides [40] have been investigated theoretically.…”

Surface Wave Modes in Chiral Negative Refraction Grounded Slab Waveguides

“…A slab of such negative refraction chiral medium can be used as a "perfect lens", which provides subwavelength resolution for circularly polarized waves [30,31]. The effective negative indexes of refraction in chiral metamaterials have been experimentally realized at microwave frequencies [32][33][34] and THz frequencies [35] in 2009.…”

Dual-Band Circular Polarizer and Asymmetric Spectrum Filter Using Ultrathin Compact Chiral Metamaterial

“…The unusual polarization functionalities and chirality not found in natural medium arise from the magneto-electric cross coupling of chiral structures due to their bianisotropy and lack of any mirror symmetry. After the extensive theoretical or numerical studies, and experimental realizations, there have been many efforts tending toward the practical applications of the CMMs in manipulating the polarization states of EM wave [16][17][18][19][20][21][22][23][24][25][26][27][28][29], polarization spectral filtering [30], improving the gain and axial ratio of circularly polarized antennas [31], subwavelength focusing and imaging [32], as well as microwave absorbers [33]. A set of circular polarizers [16][17][18][19][20][21][22][23][24] and pure linear polarization rotators [25][26][27][28][29] have been intensively reported.…”