Storing light in active optical waveguides with single-negative materials
Storing light in active optical waveguides with single-negative materials
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DOI：
10.1063/1.3431574
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发表时间：
2010-05-24
影响因子：
4
通讯作者：
Sridhar, S.
中科院分区：
文献类型：
--
作者：
Lu, W. T.;Huang, Y. J.;Sridhar, S.
我们证明，由包层单负材料的传统电介质组成的非谐振平面波导支持简并传播模式，如果介质是无损的，则群速度和总能量流可以为零。吸收损耗将破坏真实的频率/复波矢量模式的零群速度条件。我们发现，通过将增益G纳入核心介质中，存在一个临界增益值G（c），在该值下，我们可以恢复零群速度的条件，从而可以停止和存储光脉冲。这种结构比双负超材料更容易实现，占地面积小，并且可以集成到超紧凑的片上光电子器件中。(C)2010年美国物理学会。[doi：10.1063/1.3431574]
We show that a nonresonant planar waveguide consisting of conventional dielectric cladded with single-negative materials supports degenerate propagating modes for which the group velocity and total energy flow can be zero if the media are lossless. Absorptive losses will destroy the zero-group velocity condition for real frequency/complex wave vector modes. We show that by incorporating gain G into the core dielectric, there exists a critical gain value G(c) at which we can recover the condition of zero group velocity, so that light pulses can be stopped and stored. This structure is simpler to achieve than double-negative metamaterials, has small footprint, and can be incorporated into ultracompact on-chip optoelectronics. (C) 2010 American Institute of Physics. [doi:10.1063/1.3431574]