Imprinted quarter wave plate at terahertz frequency
Cross-sectional view of a quarter wave plate (two plates fixed back-to-back). The device is made of a vertical grating with alternate refractive index (HDPE) and (air). The grating vector is .
SEM images of (a) the 165 and (b) deep silicon master. Note the scale difference in SEM image.
Flow diagram for the imprinting process.
SEM images of (a) the 165 and (b) deep HDPE imprinted plate. Note the scale difference in SEM image.
Measurement setup in the FTIR chamber.
(Color online) Measured polarizing factor of the QWPs for three device configurations.
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