• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Conference on Photonic Crystal Materials and Devices Jan 28-30, 2003 San Jose, California, USA >Two-dimensional photonic crystal infiltrated by liquid crystal: response to applied electric field
【24h】

Two-dimensional photonic crystal infiltrated by liquid crystal: response to applied electric field

机译：液晶渗透的二维光子晶体：对施加电场的响应

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We have calculated the photonic band structure of a 2D photonic crystal whose empty cylinders are infiltrated by a liquid crystal; a D.C. electric field is applied in the direction parallel to the cylinders. The local dielectric constant within the cylinders is obtained by minimizing the free energy, which has elastic and electrostatic contributions. We have assumed strong anchoring of the molecules of the nematic liquid crystal at the cylinder boundaries and have averaged over the cross-sectional area of the cylinder. The resulting dielectric tensor is diagonal and depends on the applied field. Moreover, it has the same symmetry as a uniaxial material, so that the optical response of the H-modes and E-modes is given by different dielectric constants ("ordinary" and "extraordinary"). The photonic band structures exhibit a notable dependence on the applied field with shifts up to 6% of the bands. For the E-modes, with a careful choice of the filling fraction it is possible to design a complete photonic gap for a certain range of electric fields, and close the gap for other values of the field. Such behaviour could be applied to optical tuning, switching, and polarizing of light.
机译：我们已经计算出了一个二维光子晶体的光子能带结构，该晶体的空圆柱体被液晶渗透。在平行于圆柱的方向上施加直流电场。通过最小化具有弹性和静电作用的自由能来获得圆柱体内的局部介电常数。我们假设向列液晶分子在圆柱体边界处牢固地锚定，并且在圆柱体的整个横截面上取平均值。所得的介电张量是对角线，并取决于所施加的场。此外，它具有与单轴材料相同的对称性，因此H模式和E模式的光学响应由不同的介电常数（“常规”和“非常规”）给出。光子能带结构对所施加的场表现出显着的依赖性，其位移最多为能带的6％。对于E模式，通过仔细选择填充率，可以为一定范围的电场设计一个完整的光子间隙，并为其他电场值缩小间隙。这样的行为可以应用于光的光学调谐，切换和偏振。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号