Imprinted terahertz artificial dielectric quarter wave plates

Saha, S.C., Ma, Y., Grant, J.P. , Khalid, A. and Cumming, D.R.S. (2010) Imprinted terahertz artificial dielectric quarter wave plates. Optics Express, 18(12), pp. 12168-12175. (doi: 10.1364/OE.18.012168)

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We have developed low-loss polymer artificial dielectric quarter wave plates (QWP) operating at 2.6, 3.2 and 3.8 THz. The QWPs are imprinted on high density polyethylene (HDPE) using silicon masters. The grating period for the quarter wave plates is 60 mu m. 330 mu m, 280 mu m and 230 mu m deep gratings are used to obtain a pi/2 phase retardance between TE and TM polarization propagating through the QWPs. High frequency structure simulator (HFSS) was used to optimize the grating depth. Since the required grating depth is high, two plates, fixed in a back-to-back configuration were used for each QWP. A maximum aspect ratio (grating height/grating width) of 6.6 was used.

Item Type:Articles
Keywords:Devices, fabrication, gratings, submillimeter wavelengths
Glasgow Author(s) Enlighten ID:Saha, Dr Shimul and Ma, Mr Yong and Cumming, Professor David and Khalid, Dr Ata-Ul-Habib and Grant, Dr James
Authors: Saha, S.C., Ma, Y., Grant, J.P., Khalid, A., and Cumming, D.R.S.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Optics Express
Publisher:Optical Society of America
ISSN (Online):1094-4087

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