Adarsh Ravi

I interned with the Advanced Technologies group in InvenSense Inc., CA during the summer of 2014. I was involved in the characterization of MEMS based piezoelectric ultrasonic transducers; where, I performed Q-factor and other sensor parameter tests using Laser Doppler Vibrometer (LDV), impedance measurement and hydrophone test benches. I was also involved in the setting up of test stations to carry out electrical and acoustic characterization of these MEMS sensors.

 

Before joining the Master's program at ASU, I worked as a Project Assistant under Prof. Navakanta Bhat at the Center for NanoScience and Engineering, Indian Institute of Science - Bangalore. Here, I was involved in the Brain-Machine Interface project; during which I designed and fabricated bio-compatible 64 electrode and 120 electrode planar microelectrode arrays. I mainly worked on improving the electrical impedance and signal-to-noise ratio of the pMEAs by employing Lead-less Platinum black electroplating, Titanium Nitride and Platinum thin-film sputter deposition and photolithographic technologies.

 

During my undergrad, I interned at the NDE Laboratory in John F. Welch Technology Center (GE Global Research Center - Bangalore) and at Optics Lab, Indian Institute of Technology - Madras (IIT-M), Chennai. At GE GRC, I devised a mathematical model to study the effects of transducer geometries and excitation patterns on the acoustic pressure profiles for ultrasonic NDE applications using MATLAB. I modeled and validated pressure profiles of a circular transducer for both continuous wave and pulsed wave excitations. Further, I developed an algorithm for ray tracing inside smooth and complex rectangular geometries. At IIT-M, I worked on mathematical modelling of Thulium doped fiber ring LASER operating at around 2um wavelengths.