Freely Tunable Broadband Polarization Rotator for Terahertz Waves

A freely tunable polarization rotator for broadband terahertz waves is demonstrated using a three-rotating-layer metallic grating structure, which can conveniently rotate the polarization of a linearly polarized terahertz wave to any desired direction with nearly perfect conversion efficiency. This low-cost, high-efficiency, and freely tunable device has potential applications as material analysis, wireless communication, and THz imaging.

[1]  E. Wolf,et al.  Principles of Optics (7th Ed) , 1999 .

[2]  Itsunari Yamada,et al.  Terahertz wire-grid polarizers with micrometer-pitch Al gratings. , 2009, Optics letters.

[3]  Daniel R. Grischkowsky,et al.  THz time-domain spectroscopy of high Tc substrates , 1990 .

[4]  T. Jiang,et al.  Manipulating electromagnetic wave polarizations by anisotropic metamaterials. , 2007, Physical review letters.

[5]  Behrad Gholipour,et al.  An All‐Optical, Non‐volatile, Bidirectional, Phase‐Change Meta‐Switch , 2013, Advanced materials.

[6]  Zhen Tian,et al.  A perfect metamaterial polarization rotator , 2013 .

[7]  T. Nozokido,et al.  Refractive index of nematic liquid crystals in the submillimeter wave region. , 1997, Applied optics.

[8]  M. Rahm,et al.  Metamaterial-based gradient index lens with strong focusing in the THz frequency range. , 2010, Optics express.

[9]  Uwe Ewert,et al.  Terahertz birefringence of liquid crystal polymers , 2006 .

[10]  D. Grischkowsky,et al.  Far-infrared time-domain spectroscopy with terahertz beams of dielectrics and semiconductors , 1990 .

[11]  Martin Koch,et al.  Variable-focus terahertz lens. , 2011, Optics express.

[12]  Zhao Zhang,et al.  Enhanced rotation of the polarization of a light beam transmitted through a silver film with an array of perforated S-shaped holes. , 2013, Physical review letters.

[13]  N. Kanda,et al.  Terahertz wave polarization rotation with double layered metal grating of complimentary chiral patterns. , 2007, Optics express.

[14]  N I Zheludev,et al.  Giant gyrotropy due to electromagnetic-field coupling in a bilayered chiral structure. , 2006, Physical review letters.

[15]  Willie J Padilla,et al.  A metamaterial solid-state terahertz phase modulator , 2009 .

[16]  Xicheng Zhang,et al.  Materials for terahertz science and technology , 2002, Nature materials.

[17]  Renhao Fan,et al.  Asymmetric transmission of terahertz waves through a graphene-loaded metal grating , 2014 .

[18]  Ru-Wen Peng,et al.  Transparent Metals for Ultrabroadband Electromagnetic Waves , 2012, Advanced materials.

[19]  Weili Zhang,et al.  Manipulating polarization states of terahertz radiation using metamaterials , 2012 .

[20]  T. Cui,et al.  Optically controlled background-free terahertz switching in chiral metamaterial. , 2014, Optics letters.

[21]  A. Mitchell,et al.  Mechanically tunable terahertz metamaterials , 2013 .

[22]  Masayoshi Tonouchi,et al.  Cutting-edge terahertz technology , 2007 .

[23]  Allen Taflove,et al.  Computational Electrodynamics the Finite-Difference Time-Domain Method , 1995 .

[24]  Ci-Ling Pan,et al.  Electrically controlled room temperature terahertz phase shifter with liquid crystal , 2004 .

[25]  Oliver G. Schmidt,et al.  Towards Flexible Magnetoelectronics: Buffer‐Enhanced and Mechanically Tunable GMR of Co/Cu Multilayers on Plastic Substrates , 2008 .

[26]  Masayoshi Tonouchi,et al.  Broadband terahertz polarizers with ideal performance based on aligned carbon nanotube stacks. , 2012, Nano letters.

[27]  A. Figotin,et al.  Nonreciprocal magnetic photonic crystals. , 2001, Physical review. E, Statistical, nonlinear, and soft matter physics.

[28]  M. Wegener,et al.  Gold Helix Photonic Metamaterial as Broadband Circular Polarizer , 2009, Science.

[29]  D. R. Chowdhury,et al.  Terahertz Metamaterials for Linear Polarization Conversion and Anomalous Refraction , 2013, Science.

[30]  A. Alú,et al.  Twisted optical metamaterials for planarized ultrathin broadband circular polarizers , 2012, Nature Communications.

[31]  Hong-qiang Li,et al.  Metallic helix array as a broadband wave plate. , 2011, Physical review letters.

[32]  Renhao Fan,et al.  Oblique metal gratings transparent for broadband terahertz waves , 2013 .

[33]  Dany Dumont,et al.  Mechanically tunable diffraction gratings recorded on an azobenzene elastomer , 2002 .

[34]  Zhen Tian,et al.  Broadband Terahertz Wave Deflection Based on C‐shape Complex Metamaterials with Phase Discontinuities , 2013, Advanced materials.