Ezcitation of Hypersound Due to Coupling with Space Charge Waves in GaN Films

摘要：

The excitation of hypersonic waves (f=30-200 GHz) due to coupling with amplified space charge waves in GaN films is investigated theoretically. An amplification of space charge waves due to the negative differential conductivity in GaN films placed onto a semiinfinite substrate is considered and possible spatial increments are calculated. The amplified space charge waves can excite hypersonic waves at the same frequency due to piezoeffect and deformation potential mechanisms. It is demonstrated that the piezoeffect seems very effective for resonant excitation of hypersonic waves in the case of a full mechanic contact of GaN film and a non-piezoeffectic substrate.

作者: V. V. Grimalsky S. V. Koshevaya L. M. Gaggero-S. F. Diaz-A.

作者单位: Faculty of Sciences, Autonomous University of Morelos, Cuernavaca, ZP 62210, Mor., Mexico Autonomous University of Morelos, CIICAp, Cuernavaca, ZP 62210, Mor., Mexico

会议类型: 国际会议

会议名称: Progress in Electromagnetics Research Symposium 2007(2007年电磁学研究新进展学术研讨会)(PIERS 2007)

会议地点: 北京

会议语种:英文

页码: 244-247

在线出版日期: 2007-03-26（万方平台首次上网日期，不代表论文的发表时间）