Open AccessImprinted terahertz artificial dielectric quarter wave plates
Author(s) -
Subhajit Saha,
Yong Ma,
James P. Grant,
A. Khalid,
David R. S. Cumming
Publication year - 2010
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.012168
Subject(s) - grating , optics , materials science , terahertz radiation , dielectric , hfss , polarization (electrochemistry) , optoelectronics , physics , telecommunications , chemistry , microstrip antenna , computer science , antenna (radio)
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.