183 citations · 454 across the 7 of their papers we have counts for
7 papers
Experimental observation of ballistic to diffusive transition in AlN thin films
Md Shafkat Bin Hoque, Michael E. Liao, Saman Zare +10
Bulk AlN possesses high thermal conductivity due to long phonon mean-free-paths, high group velocity, and long lifetimes. However, the thermal transport scenario becomes very diffe…
Thin-Film Lithium Niobate Acoustic Resonator with High Q of 237 and k2 of 5.1% at 50.74 GHz
Jack Kramer, Vakhtang Chulukhadze, Kenny Huynh +6
This work reports a 50.74 GHz lithium niobate (LiNbO3) acoustic resonator with a high quality factor (Q) of 237 and an electromechanical coupling (k2) of 5.17% resulting in a figur…
Defects Evolution and Mg Segregation in Mg-implanted GaN with Ultra-High-Pressure Annealing
Y. Wang, K. Huynh, M. E. Liao +9
Annealing Mg-implanted homoepitaxial GaN at temperatures at or above 1400 °C eliminates the formation of inversion domains and leads to improved dopant activation efficiency. Exten…
Experimental Observation of Localized Interfacial Phonon Modes
Zhe Cheng, Ruiyang Li, Xingxu Yan +12
Interfaces impede heat flow in micro/nanostructured systems. Conventional theories for interfacial thermal transport were derived based on bulk phonon properties of the materials m…
A Refined Model for Epitaxial Tilt of Epilayers Grown on Miscut Substrates
Michael E. Liao, Mark S. Goorsky
A refined model of the origin of epitaxial tilt on miscut (or vicinal) substrates is explained by employing crystal modeling and reciprocal space analysis. The Nagai tilt model (H.…
Experimental Observation of High Intrinsic Thermal Conductivity of AlN
Zhe Cheng, Yee Rui Koh, Abdullah Mamun +17
AlN is an ultra-wide bandgap semiconductor which has been developed for applications including power electronics and optoelectronics. Thermal management of these applications is th…
Thermal Conductance Across Harmonic-matched Epitaxial Al-sapphire Heterointerfaces
Zhe Cheng, Yee Rui Koh, Habib Ahmad +17
A unified understanding of interfacial thermal transport is missing due to the complicated nature of interfaces which involves complex factors such as interfacial bonding, interfac…