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arXiv 0811.2513physics.optics
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纳米光子电路中光学天线的阻抗匹配和发射特性

Impedance matching and emission properties of optical antennas in a nanophotonic circuit

Jer-Shing Huang, Thorsten Feichtner, Paolo Biagioni, Bert Hecht

摘要:

一个实验上可实现的原型nanophotonic电路由一个接收和发射纳米天线连接的两线光传输线使用有限差分时域和频域模拟研究。为了优化纳米光子电路元件之间的耦合,我们将阻抗匹配概念类比地应用于射频技术。我们表明,阻抗匹配的程度,特别是发射纳米天线的阻抗,可以推断从实验上可访问的传输线上的驻波图案。我们证明了通过现代微加工技术实现的天线长度和宽度的变化匹配的纳米天线阻抗的传输线的特性阻抗的可能性。发射天线的辐射效率也取决于其几何形状,但与阻抗匹配的程度无关。我们的纳米光子学系统方法为实现一般纳米光子电路和各种衍生的新型器件提供了基础。

英文摘要:

An experimentally realizable prototype nanophotonic circuit consisting of a receiving and an emitting nano antenna connected by a two-wire optical transmission line is studied using finite-difference time- and frequency-domain simulations. To optimize the coupling between nanophotonic circuit elements we apply impedance matching concepts in analogy to radio frequency technology. We show that the degree of impedance matching, and in particular the impedance of the transmitting nano antenna, can be inferred from the experimentally accessible standing wave pattern on the transmission line. We demonstrate the possibility of matching the nano antenna impedance to the transmission line characteristic impedance by variations of the antenna length and width realizable by modern microfabrication techniques. The radiation efficiency of the transmitting antenna also depends on its geometry but is independent of the degree of impedance matching. Our systems approach to nanophotonics provides the basis for realizing general nanophotonic circuits and a large variety of derived novel devices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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