Optical Science and Engineering ETDs
Publication Date
Spring 4-15-2025
Abstract
In this study, we explore photonic crystal surface emitting laser (PCSEL) for vertical emission with high beam quality, high room temperature continuous wave output power, compactness, and electrical injection, with less fabrication complexity. The fabrication process involves epitaxial regrowth, where photonic crystals are patterned via electron beam lithography and etched using inductively coupled plasma. We employ dot-in-well (DWELL) active regions, known for superior thermal stability, to mitigate quantum dot (QD) degradation during high-temperature regrowth. Both molecular beam epitaxy (MBE) and metal organic chemical vapor deposition (MOCVD) are explored as a regrowth phase. MOCVD regrowth yielded better crystal quality than MBE. We successfully demonstrate an optically pumped epitaxially regrown DWELL PCSEL with an emission wavelength of 1230 nm operating at room temperature. Furthermore, the DWELL active region shows excellent emission wavelength stability and intensity despite the high temperature regrowth process.
Degree Name
Optical Science and Engineering
Level of Degree
Doctoral
Department Name
Optical Science and Engineering
First Committee Member (Chair)
Prof. Ganesh Balakrishnan
Second Committee Member
Prof. Daniel Feezell
Third Committee Member
Prof. Nathan Jackson
Fourth Committee Member
Prof. Thomas J. Rotter
Fifth Committee Member
Dr. Sadhvikas Addamane
Keywords
PCSELs, DWELL, Quantum Dot, Epitaxial Regrowth, High Power Laser
Document Type
Dissertation
Language
English
Recommended Citation
Seth, Subhashree. "Photonic Crystal Surface Emitting Lasers (PCSELs) based on Dot in Well (DWELL) Active Region by Epitaxial Regrowth Method." (2025). https://digitalrepository.unm.edu/ose_etds/109