Author: Katherine Tharp

The Dynamic Microsystems Lab (DML) celebrates Ankesh Todi, a recent doctoral graduate, for successfully defending his dissertation and walking the stage for his PhD this past Spring 2025.

Ankesh pursued his Ph.D. in Electrical Engineering, specializing in MEMS Design & Semiconductor Processing, at the University of Central Florida. His research focus was on designing and demonstrating a functional, high-frequency (~25 MHz) resonant MEMS accelerometer, as well as improving the performance of resonators through geometrical optimization. Adapting to many changes and often setbacks in fabrication, we are all proud to see him reach this milestone and eager to see what is in store for him next.

His dissertation entitled “High-Frequency Z-Axis Piezoelectric Resonant Micro-Accelerometers Based On Piezoelectric Stiffening Effect” was successfully defended on April 4th, 2025. In the photo below, Ankesh can be seen demonstrating his device during his Ph.D. defense.

Ankesh’s 7 years of dedication to his craft, along with his passion and resilience is evidenced in the below photo that we’ve called “A man and his machine”.

DML wishes Dr. Todi all the best in his future endeavors and looks forward to his continued growth and next visit!

The Dynamic Microsystems Lab (DML) celebrates Parvin Akhkandi, a recent doctoral graduate, for successfully defending her dissertation and walking the stage for her Ph.D., this past Spring 2025.

Parvin pursued her Ph.D. in Electrical Engineering at the University of Central Florida with a focus on the use of MEMS-based oscillators to improve the diagnosis and management of sleep disorders. She has since accepted a full-time position with Apple in California as a Hardware Engineer.

Her dissertation entitled “MEMS-Based Airflow Sensor for Apnea Detection Using Time-of-Flight Technique” was successfully defended on March 17th, 2025.

To read more about Dr. Akhandi’s innovative research, see below.

DML wishes Dr. Akhkandi all the best in her future endeavors and looks forward to her continued growth and next visit!

The Dynamic Microsystems Lab (DML) celebrates Yasaman Majd, a recent doctoral graduate, for successfully defending her dissertation this past summer semester and walking the stage for her PhD in Fall 2024.

Yasaman pursued her Ph.D. in Electrical Engineering at the University of Central Florida with MEMS resonators as her research focus. She has recently accepted a full-time position with Apple in Texas as a Touch Sensing Engineer.

Her dissertation entitled “Design and Optimization of Temperature-Stable MEMS Resonators for Timing Applications Based on Thin-Film Lithium Tantalate” was successfully defended on June 17th, 2024.

Dissertation Summary:

In her research, she investigates the development of a silicon-based MEMS device that achieves low-frequency variation across wide temperature ranges, high-quality factors, and low insertion loss, meeting the demands of modern communication systems. She explores the thermal behavior of S0 Lamb wave X-cut Lithium Tantalate (LT) resonators, demonstrating a zero-temperature coefficient of frequency (turnover temperature) both numerically and experimentally. These resonators are optimized for high electromechanical coupling (~5%), high turnover temperatures (>80°C), and a quality factor of ~2000 at 200 MHz. Additionally, she proposes a novel passive temperature compensation method using a heterostructure of doped silicon and rotated X-cut LT resonators to cancel both first and second-order temperature coefficients. This innovative design achieves a frequency drift of just 70 ppm across a temperature range of 20°C to 100°C at 313 MHz, significantly outperforming conventional silicon-based resonators.

DML wishes Dr. Majd all the best in her future endeavors and looks forward to her continued growth and next visit!

The Dynamic Microsystems Lab is proud to announce our very own, Justin Phelps, as a recent doctoral graduate who successfully defended his dissertation and walked the stage for his Ph.D. this past semester.

Justin pursued his Ph.D. in Electrical Engineering at the University of Central Florida with MEMS and Power Electronics as his research focuses. We are happy to also announce that he has recently accepted a position to continue here at UCF’s DML, as a Post Doctorate Researcher.

His dissertation entitled “Lithium Niobate Piezoelectric Transformers for Compact Electronics and Atmospheric Plasma Generation” was successfully defended on October 31st, 2024.

Dr. Phelps will also continue his impact at the undergraduate level, as he mentors the DML undergraduates and instructs Linear Circuits 1 and 2 sections for the upcoming Spring 2025 semester at UCF.

DML wishes him all the best in his future endeavors and we look forward to what he’ll do next!