Event
Ph.D. Research Proposal Exam: Aziz Karasahin
Thursday, July 16, 2020
2:00 p.m.
Virtual Meeting // https://umd.zoom.us/j/9321266680
Maria Hoo
301 405 3681
mch@umd.edu
ANNOUNCEMENT: Ph.D. Research Proposal Exam
Name: Aziz Karasahin
Committee:
Professor Edo Waks (Chair)
Professor Mohammad Hafezi
Professor Cheng Gong
Date/time: Thursday, July 16, 2020 at 2:00 PM
Location: Virtual Meeting // https://umd.zoom.us/j/9321266680
Title: Donor Bound Excitons in Cl doped ZnSe Quantum Wells
Abstract:
Solid-state spin qubits are important building blocks for scalable quantum information processing. To be able to perform a large number of operations, spin qubits must exhibit long spin coherence times. Moreover, spin memories must be strongly interacting with photons, which are carriers of information for both on-chip or long scale distances. To enable these interactions, key requirements are bright and uniform photon generation, optically accessible spin states with long coherence times, ability to interface spin states with photons by enhancing the interactions using nanophotonic cavities.
In this Ph.D. research, we aim to study Cl bound excitons in ZnSe quantum wells as potential solid-state qubit candidates. Firstly, we will investigate the emission properties of donor bound excitons. We will use optical spectroscopy techniques to understand the spectrum, lifetime, polarization, and stability of excitonic emission from bound donor electrons. We will perform resonant photoluminescence to understand the origin of short lifetimes. By using spatial filtering techniques and low-density doping, we will show single-photon emission from these impurities. Then, we will investigate Zeeman levels under magnetic fields. These measurements will give us a better understanding of g factors, as well as emission selection rules. Then, coherent spin pumping techniques will be performed to characterize spin coherence properties. Lastly, we will discuss the nanofabrication of nanophotonic structures and show cavity-emitter coupling, which is the basis for strong spin-light interaction
