PMID- 20588340 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20101112 LR - 20181023 IS - 1094-4087 (Electronic) IS - 1094-4087 (Linking) VI - 18 IP - 12 DP - 2010 Jun 7 TI - Imprinted terahertz artificial dielectric quarter wave plates. PG - 12168-75 LID - 10.1364/OE.18.012168 [doi] AB - 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 microm. 330 microm, 280 microm and 230 microm 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. FAU - Saha, Shimul C AU - Saha SC AD - Department of Electronics and Electrical Engineering, University of Glasgow, Glasgow G12 8LT, UK. FAU - Ma, Yong AU - Ma Y FAU - Grant, James P AU - Grant JP FAU - Khalid, A AU - Khalid A FAU - Cumming, David R S AU - Cumming DR LA - eng PT - Journal Article PL - United States TA - Opt Express JT - Optics express JID - 101137103 EDAT- 2010/07/01 06:00 MHDA- 2010/07/01 06:01 CRDT- 2010/07/01 06:00 PHST- 2010/07/01 06:00 [entrez] PHST- 2010/07/01 06:00 [pubmed] PHST- 2010/07/01 06:01 [medline] AID - 199726 [pii] AID - 10.1364/OE.18.012168 [doi] PST - ppublish SO - Opt Express. 2010 Jun 7;18(12):12168-75. doi: 10.1364/OE.18.012168.