At the 2023 CS International Conference in Brussels, Belgium, Leah gave an invited talk on her work making heterogeneously integrated VCSELs on silicon. These VCSELs integrated via epitaxial transfer have improved thermal performances compared to non-integrated counterparts.
The group attended the “Celebrating the Life of Professor Emeritus Nick Holonyak Jr.” service in honor of Dr. Holonyak’s passing. Dr. John Dallesasse spoke as a past student of Holonyak, and Leah Espenhahn spoke as a current student of Dallesasse and thus a “research grandchild” of Holonyak.
After a number of speeches in honor of Dr. Holonyak, red LEDs in heart casings were past out to attendees in honor of Holonyak, who created the first visible LED. The group honors the passing of a great man, and give their best wishes to his widowed wife, Kay.
Robert Kaufman, Kevin Pikul, and Leah Espenhahn present a high-level view on the research conducted within the group at the 2023 Engineering Research Fair. Over the course of two hours, 74 undergraduate students show interest in the group and the research being performed.
Leah Espenhahn, Kevin Pikul, and Prof. Dallesasse are interviewed about their article published in Compound Semiconductor. They explore the topics of VCSELs and III-V/Si integration via epitaxial transfer.
Compound Semiconductor Article
Prof. John Dallesasse is interviewed for a CBC Radio article on the importance and prevalence of microchips in the modern age.
Prof. John Dallesasse shares his insights about the semiconductor shortage’s causes and future.
“VCSELs are a type of device that are seeing broad use in a growing number of applications,” said Dallesasse. “They are being looked at for use in self-driving cars that utilize LIDAR, and are already extensively used in the fiber optic networks of large data centers.”
“We’re specifically looking at ways of improving the optical beam that comes out of the VCSEL,” said Dallesasse. “When you have a device like a VCSEL, the optical modes can be thought of as the light patterns on the surface. In order for you to utilize patterns, it’s desirable to be able to control those light patterns.”
