Characteristic of Free Stand Wire-Grid Polarizers in Sub-Millimeter Wave Range

Abstract:

Free stand wire-grids (FSWG) are widely used as polarizers, beam splitters, attenuators, and interferometers in millimeter wave and THz ranges. FSWG behaves as low-loss element as the wire grid is unsupported with a substrate, and provides good performance in the range of 0.1-3.0 THz. This paper analyzes the characteristic of the wire-grid polarizers in sub millimeter wave range. These analysis include the spectral transmittance with different wire spacing and incident angle. In order to evaluate the analysis, we measured the transmittance of wire-grid polarizer by using a novel quasi-optical system. Test results of transmittance show that the extinction ratio is over 15 dB up to 700GHz, which agrees well with predictions.

• Periodical: Applied Mechanics and Materials (Volume 290)
• Pages: 127-132
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.290.127
• Online since: February 2013
• Authors: Hai Rui Liu, Jun Sheng Yu, Xiao Ming Liu
• Keywords: Free Stand Wire-Grids, Measurement, Quasi-Optical System, Sub-Millimeter

References

[1] S. Oka, H. Togo, N. Kukutsu, and T. Nagatsuma, Latest trends in millimeter-wave imaging technology, , Progress In Electromagnetics Research Letters, Vol. 1, 197-204, (2008).

DOI: 10.2528/pierl07120604

[2] S. Yeom, D. Lee, J. Son, and V. P. Guschin, Distance estimation of concealed objects with stereoscopic passive millimetre-wave imaging, Progress In Electromagnetics Research Vol. 115, 399-407, (2011).

DOI: 10.2528/pier11030307

[3] B. Zhang, Y. Fan, Z. Chen, X. F. Yang and F. Q. Zhong, An Improved 110-130-GHz Fix-Tuned Subharmonic Mixer with Compact Microstrip Resonant Cell Struture., Journal of Electromagnetic Waves and Applications, Vol. 25, 411-420, (2011).

DOI: 10.1163/156939311794362830

[4] M. Z. Zhan., W. Zhao, and R. M. Xu, Design of millimetre-wave wideband mixer with a novel IF bloc, Progress In Electromagnetics Research C, Vol. 30, 41-52, (2012).

DOI: 10.2528/pierc12041618

[5] W. Dou, H. Meng, B. Nie, Z. Wang, and F. Yang, Scanning antenna at THz band based on Quasi-optical Techniques, Progress In Electromagnetics Research Vol. 108, 343-359, (2010).

DOI: 10.2528/pier10062810

[6] H. Liu, Z. Lou, H. Wang, J. Miao, Precise Design of Millimeter wave quasi-optical Faraday Rotators, Journal of Infrared, Millimeter and Terahertz Waves, Vol. 30, No. 4, 401-409, (2009).

DOI: 10.1007/s10762-008-9458-2

[7] M. Cai and E. P. Li, A novel Terahertz sensing device comprising of a parabolic reflective surface and a bi-conical structure, Progress In Electromagnetics Research, Vol. 97, 61-73, (2009).

DOI: 10.2528/pier09090902

[8] X. Q. Lin, , T. J. Cui, Y. Fan, and X. Liu, Frequency selective surface designed using electric resonant structures in Terahertz frequency bands, Journal of Electromagnetic Waves and Applications, Vol. 23, No. 1, 21-99, (2009).

DOI: 10.1163/156939309787604724

[9] C. F. Hsieh, Y. C. Lai, R. P. Pan, C. L. Pan, Polarizing terahertz waves with nematic liquid crystals, Opt. Letters, Vol. 33, 1174, (2008).

DOI: 10.1364/ol.33.001174

[10] I. Yamada, K. Takano, M. Hangyo, M. Saito and W. Watanabe, Terahertz wire-grid polarizers with micrometer-pitch Al gratings, Opt. Letters , Vol. 34, No. 3, (2009).

DOI: 10.1364/ol.34.000274

[11] D. Tian, H. Zhang, W. Lai, Q. Wen, Y. Song, Z. Wang, Double Wire-grid Terahertz Polarizer on Low-loss Polymer Substrates, CHIN. PHYS. LETT, Vol. 27, No. 10, (2010).

[12] Information on http: /www. mtinstruments. com/downloads/Polarizer%20Datasheet. pdf.

[13] J. B. Sapiro and E. E. Bloemhof, Fabrication of Wire-grid Polarizers and Dependence of Submillimeter-wave Optical Performance of Pitch Uniformity, International Journal of Infrared and Millimeter Waves, Vol. 11, No. 8, (1990).

DOI: 10.1007/bf01008639

[14] G. M. Smith, A. Harvey, W. Webb, M. Leeson, J. C. G. Lesurf, Quasi-optical techniques for MM-wave heterodyne systems, Oct. 2, (1992).

[15] Information on http: /www. abmillimetre. com/Introduction. htm.