Dataset: Deterministic optical polarisation in nitride quantum dots at thermoelectrically cooled temperatures
University of Oxford (2017)
Abstract:
These data were created in order to assess the high temperature polarisation properties of a-plane InGaN quantum dots, in micro-photoluminescence experiments and kp band simulations, from 2015 to 2017. OriginPro has been used to analyse the data.Dataset: Optical fabrication and characterisation of SU-8 disk photonic waveguide heterostructure cavities - version 2
University of Oxford (2017)
Abstract:
These data all relate to GaAs photonic crystal waveguides with SU-8 photoresist disks patterened on top them to create cavities. The waveguides contain high-density embedded InGaAs quantum dots which couple to the cavity modes.The folder fig2 contains data from an FDTD simulation measuring cavity Q factor and mode volume against disk diameter.
The folder fig3 contains micro-photoluminescence (uPL) spectra of the waveguides taken before and after cavity fabrication. See fig3/readme.txt for more information.
The folder fig4 contains the Q factor, disk thickness, and disk diameter data for all the devices studied.
The folder fig5 contains a scanning electron microscope image and associated 2D uPL map of one of the cavities.
More information and details of file formats is contained in the following files:
readme.txt
asc_file_format.txt
fig2/readme.txt
fig3/readme.txt
Note that those .txt files use unix-style line endings (LF), not Windows-style ones (CRLF). They may not display correctly in Notepad. The difficulty of achieving reliable spectral and spatial overlap is a serious problem when fabricating photonic crystal (PhC) cavities around self-assembled quantum dots. We present a method for using photoresist to optically fabricate heterostructure cavities in a PhC waveguide with a combined photolithography and micro-photoluminescence spectroscopy system. We confirm the creation of cavity modes with high quality factors (mean = 3.8*10^3, maximum = 7.4(2)*10^3). This method offers a promising route towards bright, on-chip single photon sources for quantum information applications.
Dataset: Polarisation-controlled single photon emission at high temperatures from InGaN quantum dots
University of Oxford (2017)
Abstract:
The data was taken with temperature-dependent time-integrated, time-resolved, and polarisation-resolved microphotoluminescence, and Hanbury Brown and Twiss experiments from 5 to 250 K. The purpose is to investigate whether non-polar a-plane quantum dots can act as high temperature single photon sources with optical polarisation control beyond the 200 K Peltier cooling threshold. All data were taken during April-May 2016.Direct generation of linearly polarized single photons with a deterministic axis in quantum dots: Dataset
University of Oxford (2017)
Abstract:
The data were created from k.p simulation, polarization-resolved microphotoluminescence, and Hanbury Brown and Twiss experiments, from 2015 to 2016. The data were created to demonstrate the rigorous generation of polarised single photons with a deterministic axis, and to explain the origin of high polarisation degree and fixed axis, in a-plane InGaN quantum dots. All data were hence used in Figures 2-5 in the publication “Direct generation of linearly polarized single photons with a deterministic axis in quantum dots”Source data for "Highly polarized electrically driven single-photon emission from a non-polar InGaN quantum dot"
University of Oxford (2017)