Achromatic half-wave plate for submillimeter instruments in cosmic microwave background astronomy: modeling and simulation

作者：Savini Giorgio^*; Pisano Giampaolo; Ade Peter A R

来源：Applied Optics, 2006, 45(35): 8907-8915.

DOI：10.1364/AO.45.008907

We adopted an existing formalism and modified it to simulate, with high precision, the transmission, reflection, and absorption of multiple-plate birefringent devices as a function of frequency. To validate the model, we use it to compare the measured properties of an achromatic five-plate device with a broadband antireflection coating to expectations derived from the material optical constants and its geometric configuration. The half-wave plate presented here is observed to perform well with a phase shift variation of < 2 degrees from the ideal 180 degrees over a bandwidth of Delta v/v similar to 1 at millimeter wavelengths. This formalism represents a powerful design tool for birefringent polarization modulators and enables its optical properties to be specified with high accuracy.

• 出版日期2006-12-10