Colloquium: Hao Xin

    Thursday, October 29, 2015 - 3:30pm - 5:00pm
    Meinel 307

    "Investigation of Thermoacoustic Effect and Its Applications"


    Thermoacoutsic effect describes the generation of acoustic waves from incident electromagnetic energy due to differential heat generation and absorption in an object. Thermoacoustic imaging (TAI) is a promising candidate for many biomedical applications including breast cancer detection. The elegant marriage between microwave and ultrasound, whose advantages and drawbacks in biomedical imaging are in many ways complementary, endows TAI with the unique merit of high contrast inherited from microwave and excellent spatial resolution inherited from ultrasound. TAI is also non-ionizing and noninvasive compared with other existing breast cancer imaging modalities. A potential clinical feasible TAI system is more cost-efficient and compact than mammography and MRI. TAI has also been applied as a promising hybrid modality for standoff detection of embedded explosives in which the novelty lies in remote detection of acoustic signals by state-of-the-art millimeter wave and infrared interferometer.In addition, we explore another novel potential application based on thermoacoustic effect for wireless communications, which is referred to as thermoacoustic communications (TAC). It is proposed as a potential complementary method to mitigate the challenge in conventional wireless communication from air to water, in which the electromagnetic wave cannot penetrate deep in water.In this talk, I will present our theoretical and experimental studies on thermoacoustic effect and its applications in biomedical imaging, non-destructive inspection, as well as wireless communication.

    Speaker Bio(s): 

    Dr. Hao Xin - Professor of Electrical and Computer Engineering (and Physics) at the University of Arizona. He is named an Arizona Engineering fellow in Aug. 2013. He joined University of Arizona since August 2005 as an assistant professor. He was promoted to tenured associate professor in 2009 and to full professor in 2012. He received his Ph.D in Physics from Massachusetts Institute of Technology in February 2001. From 2000 to 2003, he was a research scientist with the Rockwell Scientific Company. He was a Sr. Principal Multidisciplinary Engineer with Raytheon Company from 2003 to 2005. His primary research interests are in the area of microwave / millimeter wave / THz antennas, devices, circuits and their applications in wireless communication and sensing systems. His recent research activities have covered a broad range of high frequency technologies, including applications of new materials and techniques in microwave to THz antennas and circuits such as thermoacoustic imaging, electromagnetic band gap crystals, active meta-materials, carbon nano-tubes / graphene devices, biological inspired ideas, and 3D printing. He has authored over 230 referred publications and 14 patents (13 issued and 1 pending).