Journal
OPTICS EXPRESS
Volume 18, Issue 12, Pages 12168-12175Publisher
OPTICAL SOC AMER
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. (C)2010 Optical Society of America
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