Achromatic half-wave plate for submillimeter instruments in cosmic microwave background astronomy: modeling and simulation.
Achromatic half-wave plate for submillimeter instruments in cosmic microwave background astronomy: modeling and simulation.
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DOI：
10.1364/ao.45.008907
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发表时间：
2006-12
期刊：
影响因子：
1.9
通讯作者：
G. Savini;G. Pisano;P. Ade
中科院分区：
文献类型：
--
作者：
G. Savini;G. Pisano;P. Ade
我们采用了现有的形式主义和修改它来模拟，具有高精度，传输，反射和吸收的多板双折射器件作为频率的函数。为了验证该模型，我们用它来比较一个消色差的五板设备的宽带镀膜的预期来自材料的光学常数和它的几何配置的测量特性。观察到这里提出的半波片在毫米波长处在Δ v/v约为1的带宽上从理想的180度相移变化< 2度的情况下表现良好。这种形式主义代表了一个强大的双折射偏振调制器的设计工具，并使其光学特性被指定具有高精度。
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 Deltav/v approximately 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.