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Novel structure of GaAs-based interdigital-gated HEMT plasma devices for solid-state THz wave amplifier |
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| Authors: | Abdul Manaf Hashim Seiya Kasai Kouichi Iizuka Tamotsu Hashizume Hideki Hasegawa |
| Affiliation: | aFaculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia bResearch Center for Integrated Quantum Electronics, Hokkaido University, North 13 West 8, Sapporo 060-8628, Japan cKanto Polytechnic College, Yokokura Mitake 612-1, Oyama 323-0813, Japan |
| Abstract: | Theoretical analysis of potential distribution in the interdigital-gated high electron mobility transistor (HEMT) plasma wave device was carried out. The dc I–V characteristics of capacitively coupled interdigital structure showed that uniformity of electric field under the interdigital gates was improved compared to the dc-connected interdigital gate structure. Admittance measurements of capacitively coupled interdigital gate structure in the microwave region of 10–40 GHz showed the conductance modulation by drain–source voltage. These results indicate the existence of plasma wave interactions. |
| Keywords: | Plasma wave Interdigital Negative conductance HEMT Terahertz |
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