1. CHIPS, UCLA, Los Angeles, USA and GINTI,Dept. Mechanical Systems Eng., Tohoku Univ.,Miyagi,Japan
2. Center for Heterogeneous Integration and Performance Scaling (CHIPS),ECE Dept. UCLA,Los Angeles,USA
3. Tohoku Univ.,Department of Mechanical Systems Engineering,Miyagi,Japan
4. Center for Heterogeneous Integration and Performance Scaling (CHIPS),ECE and MSE Dept. UCLA,USA