Demonstrated low radiative loss of a quadrupole ultrashort electrical pulse propagated on a three strip coplanar transmission line
Demonstrated low radiative loss of a quadrupole ultrashort electrical pulse propagated on a three strip coplanar transmission line
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展示了在三带共面传输线上传播的四极超短电脉冲的低辐射损耗
DOI：
10.1063/1.120150
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发表时间：
1997
影响因子：
4
通讯作者：
J. Misewich
中科院分区：
文献类型：
--
作者：
R. Mcgowan;D. Grischkowsky;J. Misewich
我们提出了一种方法，用于减少由于切伦科夫辐射的共面传输线的吸收和色散，这不需要减少之间的基板和覆盖层的光电芯片的介电常数失配。仅激发三条共面传输线的奇模，产生四极超短电脉冲，并且在长距离（>5 mm）上以非常低的辐射损耗传播。四极杆的测得的频率相关的吸收和色散，进行了比较，在同一传输线上的偶模（偶极）脉冲测量。四极脉冲的辐射损耗小于偶极脉冲的1/10，而对于相同的横向尺寸，它小于两条传输线和两条缝隙共面波导的1/10。
We present an approach for reducing the absorption and dispersion due to Cherenkov radiation on coplanar transmission lines, which does not require the reduction of the permittivity mismatch between the substrate and the superstrate of the optoelectronic chip. Exciting only the odd mode of a three strip coplanar transmission line, a quadrupole ultrashort electrical pulse is generated and propagates with very low radiative loss over long distances (>5 mm). The quadrupole’s measured frequency dependent absorption and dispersion, are compared to those measured for the even mode (dipole) pulse on the same transmission line. The radiative loss for the quadrupole pulse is shown to be <1/10 that of the dipole pulse, and for equal transverse dimensions it is <1/10 the radiative loss of the two strip transmission line and of the two slot coplanar waveguide.