GENERATION OF SUBPICOSECOND ELECTRICAL PULSES BY NONUNIFORM ILLUMINATION OF GAAS TRANSMISSION-LINE GAPS

被引：25

作者：

ALEXANDROU, S ^{[1
]}

WANG, CC ^{[1
]}

SOBOLEWSKI, R ^{[1
]}

HSIANG, TY ^{[1
]}

机构：

[1] UNIV ROCHESTER,DEPT ELECT ENGN,ROCHESTER,NY 14623

来源：

IEEE JOURNAL OF QUANTUM ELECTRONICS | 1994年 / 30卷 / 05期

关键词：

D O I：

10.1109/3.303699

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We present a detailed study of subpicosecond pulse generation by nonuniform illumination of transmission-line gaps on semiinsulating GaAs. The dependence of such pulses on bias voltage, light intensity, and wavelength was examined in detail with the aid of a subpicosecond electrooptic sampling system. A complete spatial mapping of the excitation area indicates that the pulse generation is due to the depletion of the electrical field in the illuminated section of the gap. A comparison of uniform and nonuniform gap excitation schemes pinpointed the physical differences between the two processes of electrical-transient generation. Picosecond pulses were also generated by nonuniform illumination of a photoconductive gap placed in series with a coplanar waveguide for the first time and were found to contain balanced, odd modes only.

引用

页码：1332 / 1338

页数：7

共 17 条

[11] NUMERICAL STUDY OF CURRENTS AND FIELDS IN A PHOTOCONDUCTIVE DETECTOR [J].