发明名称 |
Low-twist chiral liquid crystal polarization gratings and related fabrication methods |
摘要 |
A polarization grating includes a substrate and a first polarization grating layer on the substrate. The first polarization grating layer includes a molecular structure that is twisted according to a first twist sense over a first thickness defined between opposing faces of the first polarization grating layer. Some embodiments may include a second polarization grating layer on the first polarization grating layer. The second polarization grating layer includes a molecular structure that is twisted according to a second twist sense that is opposite the first twist sense over a second thickness defined between opposing faces of the second polarization grating layer. Also, a switchable polarization grating includes a liquid crystal layer between first and second substrates. The liquid crystal layer includes liquid crystal molecules having respective relative orientations that are rotated over a thickness defined between opposing faces thereof by a twist angle that is different from a relative phase angle between respective first and second periodic alignment conditions of the first and second substrates. Related devices and fabrication methods are also discussed. |
申请公布号 |
US8339566(B2) |
申请公布日期 |
2012.12.25 |
申请号 |
US20080596189 |
申请日期 |
2008.04.16 |
申请人 |
ESCUTI MICHAEL JAMES;OH CHULWOO;KOMANDURI RAVI;NORTH CAROLINA STATE UNIVERSITY |
发明人 |
ESCUTI MICHAEL JAMES;OH CHULWOO;KOMANDURI RAVI |
分类号 |
G02F1/13;G02F1/1335 |
主分类号 |
G02F1/13 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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