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  • Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference
  • Technical Digest (Optica Publishing Group, 2003),
  • paper CMV5

Optical Sensing of High Power GaN/AlGaN Microwave FETs and Coherent GHz Phonon Generation

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Abstract

We use ultrafast optical techniques to demonstrate the generation of GHz coherent phonons by free carrier screening of giant piezofields at GaN/AlGaN strained heterointerfaces and show by direct optical probing that such phonon generation occurs emphatically in the operation of microwave GaN FETs.

© 2003 Optical Society of America

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