Ultracompact Si slot waveguide‐based polarization rotators

Abstract

A novel silicon asymmetric tilted slot waveguide‐based polarization rotator is presented. A large birefringence in the silicon slot waveguide facilitated a compact polarization rotator of subwavelength scale. A 1287 nm long TM to TE and TE to TM polarization rotator was achieved with an extinction ratio of 10 dB and an insertion loss of less than 5 dB at an operating wavelength of 1500 nm. Further performance improvement is possible for polarization rotator designed to work on TM to TE (or TE to TM) conversion: a 711 nm long TM to TE polarization rotator with 9.25 dB extinction ratio and 2.2dB insertion loss was also numerically demonstrated. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:779–785, 2015

A Multiband Antenna Stacked with Novel Metamaterial SCSRR and CSSRR for WiMAX/WLAN Applications

“…Also, the used structure tends to be complex in nature. Similarly, three zeroth order resonator (ZOR) cells-based metamaterial antenna was proposed in [ 20 ] for dual band operations. However, the antenna has a large size of 42 × 50 mm 2 with negative gain of −1.5 dBi at the lowest operating band.…”

“…The literature reports several works on metamaterial based multiband antennas [14][15][16][17][18][19][20]. Amani et al [14] proposed a CPW-fed composite right/left-handed resonant antenna.…”