Title :
Specular reflection of THz coherent acoustic phonons at solid-liquid interfaces
Author :
Wen, Yu-Chieh ; Huang, Yu-Ru ; Chen, Hung-Ping ; Gusev, Vitalyi ; Sun, Chi-Kuang
Author_Institution :
Dept. of Electr. Eng. & Inst. of Photonics & Optoelectron., Nat. Taiwan Univ., Taipei
Abstract :
We experimentally demonstrate significant reductions and spectral oscillations in THz coherent-phonon reflectivity at GaN-water interfaces. Our results indicated that the nanoscaled interfacial structures and water molecular resonances are responsible for the observed specular coupling characteristics.
Keywords :
III-V semiconductors; acousto-optical effects; gallium compounds; indium compounds; interface phonons; interface structure; nanostructured materials; oscillations; resonant states; submillimetre wave spectra; water; GaN-InGaN; GaN-water interfaces; THz coherent acoustic phonons; nanoscaled interfacial structures; solid-liquid interfaces; spectral oscillations; specular coupling characteristics; specular reflection; water molecular resonances; Acoustic measurements; Acoustic reflection; Couplings; Frequency measurement; Gallium nitride; Nanostructures; Phonons; Reflectivity; Resonance; Ultrafast optics; (000.2190) Experimental physics; (000.6850) Thermodynamics; (300.6430) Spectroscopy;
Conference_Titel :
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-859-9
