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Scalable Methods for Deterministic Integration of Quantum Emitters in Photonic Crystal Cavities


Homyk, Andrew P. (2015) Scalable Methods for Deterministic Integration of Quantum Emitters in Photonic Crystal Cavities. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/Z9D50JXC.


We investigated four unique methods for achieving scalable, deterministic integration of quantum emitters into ultra-high Q{V photonic crystal cavities, including selective area heteroepitaxy, engineered photoemission from silicon nanostructures, wafer bonding and dimensional reduction of III-V quantum wells, and cavity-enhanced optical trapping. In these areas, we were able to demonstrate site-selective heteroepitaxy, size-tunable photoluminescence from silicon nanostructures, Purcell modification of QW emission spectra, and limits of cavity-enhanced optical trapping designs which exceed any reports in the literature and suggest the feasibility of capturing- and detecting nanostructures with dimensions below 10 nm. In addition to process scalability and the requirement for achieving accurate spectral- and spatial overlap between the emitter and cavity, these techniques paid specific attention to the ability to separate the cavity and emitter material systems in order to allow optimal selection of these independently, and eventually enable monolithic integration with other photonic and electronic circuitry.

We also developed an analytic photonic crystal design process yielding optimized cavity tapers with minimal computational effort, and reported on a general cavity modification which exhibits improved fabrication tolerance by relying exclusively on positional- rather than dimensional tapering. We compared several experimental coupling techniques for device characterization. Significant efforts were devoted to optimizing cavity fabrication, including the use of atomic layer deposition to improve surface quality, exploration into factors affecting the design fracturing, and automated analysis of SEM images. Using optimized fabrication procedures, we experimentally demonstrated 1D photonic crystal nanobeam cavities exhibiting the highest Q/V reported on substrate. Finally, we analyzed the bistable behavior of the devices to quantify the nonlinear optical response of our cavities.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:photonic crystal, optical cavity, quantum emitter, quantum dot, nanowire, Purcell factor, quality factor, mode volume optical tweezing, heteroepitaxy, photoluminescence, nanofabrication, nanophotonics, nanolaser, cavity quantum electrodynamics
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Electrical Engineering
Minor Option:Applied Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Scherer, Axel
Thesis Committee:
  • Scherer, Axel (chair)
  • Yariv, Amnon
  • Yang, Changhuei
  • Choo, Hyuck
  • Walavalkar, Sameer S.
Defense Date:4 June 2015
Record Number:CaltechTHESIS:06022015-141742970
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8970
Deposited By: Andrew Homyk
Deposited On:29 Jun 2015 22:21
Last Modified:04 Oct 2019 00:08

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