David A. Horsley (Advisor)

Research Advised by Professor David A. Horsley

Magnetic Field Sensing Using Micromechanical Oscillators

Soner Sonmezoglu
David A. Horsley
Rajeevan Amirtharajah
Xiaoguang “Leo” Liu
Lorentz force magnetic sensors based on micro-electromechanical system (MEMS) resonators, measuring the vector components of the magnetic field, have recently attracted substantial commercial interest in inertial navigation systems (INSs) and compasses for smartphones. Over the last decade, substantial research effort has focused on improving the magnetic field sensitivity and resolution of Lorentz force magnetic sensors relying on either amplitude modulation...

Lorentz Force Magnetic Sensors

Mo Li
David A. Horsley
Stephen O’Driscoll
Rajeevan Amirtharajah
This dissertation describes micromechanical Lorentz force magnetic sensors for electronic compass applications. Recent development in commercially available MEMS accelerometers and gyroscopes has been focused on the reduction of size, power consumption and cost, which has led to the integration of a 3axis accelerometer and 3axis gyroscope on the same chip, known as the 6axis combo sensor. The growing market of...

Design and Analysis of High Quality Factor Chemical Vapor Deposition (CVD) Diamond Micromechanical Resonators

Mohammad Hadi Motieian Najar
David A. Horsley
M. Saif Islam
Rajeevan Amirtharajah
Diamond is an excellent material for Microelectromechanical Systems (MEMS) due to its superlative material properties compared to commonly used materials such as silicon. In its single crystalline form, diamond offers properties such as very high Young’s modulus, low thermal coefficient of expansion, and very high thermal conductivity as well as being chemically inert. Specifically, diamond’s high thermal conductivity offers the potential for ...

BPN397: Electrothermally-Actuated Free-Space Board-To-Board Optical Interconnect With Zero Power Hold

Jeffrey B. Chou
K. Yu

Free-space optical interconnect using arrays of vertical-cavity surface-emitting lasers (VCSELs) and photoreceivers can significantly increase the board-to-board interconnect bandwidth, relieving the bottleneck of traditional backplane systems in computer servers. However, critical alignment errors, due to insertion variation, have prevented the deployment of such a technology. We present an adaptive free-space optical interconnect using electrothermal MEMS rotational lens scanners with zero power hold to circumvent such difficulties. Previous groups have attempted to adaptively...