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    • 3. 发明授权
    • BINARY BEAM STEERING DEVICE
    • 二进制射束转向装置
    • EP1779191B8
    • 2008-10-08
    • EP05774889.9
    • 2005-07-26
    • ENERGY CONVERSION DEVICES, INC.
    • TSU, David, V.
    • G02F1/31
    • G02F1/31G02F1/0126G02F1/0147G02F1/11G02F1/292G02F2202/09G02F2203/18G02F2203/24
    • An element for steering electromagnetic beams. The element includes a phase change material in combination with dielectric and other layers in a multilayer optical stack. The phase change material that is reversibly transformable between two or more structural states, where different structural states differ with respect to refractive index and/or extinction coefficient. The structural state of the phase change material establishes a phase angle state for the element that dictates the direction of propagation of an output beam produced from an incident electromagnetic beam. Depending on the structural state, the element adopts one of two principal phase angle states and a binary beam steering capability is achieved in which an incident electromagnetic beam can be redirected in either of two directions. In a preferred embodiment, the output beam is a reflected beam and the element includes a phase change material sandwiched between two dielectric materials and supported by a metal layer.
    • 用于转向电磁波的元件。 元件包括与多层光学堆叠中的电介质和其他层相结合的相变材料。 在两种或更多种结构状态之间可逆地转变的相变材料,其中不同的结构状态在折射率和/或消光系数方面不同。 相变材料的结构状态为指定由入射电磁束产生的输出光束的传播方向的元件建立相位角状态。 取决于结构状态,元件采用两个主要相位角状态中的一个,并且实现二进制波束转向能力,其中入射电磁束可以在两个方向中的任一方向上重新定向。 在优选实施例中,输出光束是反射光束,并且元件包括夹在两种介电材料之间并由金属层支撑的相变材料。