Dataset: Optical Fabrication and Characterisation of SU-8 Disk Photonic Waveguide Heterostructure Cavities
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...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Dataset |
| Language: | English |
| Published: |
University of Oxford
2017
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| _version_ | 1797086139470839808 |
|---|---|
| author | Nuttall, L Lennon, S Brossard, F |
| author2 | Taylor, R |
| author_facet | Taylor, R Nuttall, L Lennon, S Brossard, F |
| author_sort | Nuttall, L |
| collection | OXFORD |
| description | 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.
=====================================================
.asc files contain micro-photoluminescence spectroscopy data for one or more positions on the sample.
The values on each line of the file are separated by tab characters. All values in the file are numeric.
Each line corresponds to a particular wavelength. The first value in each line gives the wavelength in nm. Subsequent values give the number of photons detected by the CCD at that wavelength.
If the filename contains "xmap(nx,sx)" and/or "ymap(ny,sy)", where nx, ny, sx and sy are arbitrary numbers, then the file contains a map over an area of the sample. The number of points in x and y are given by nx and ny respectively. The physical separation in micrometres between adjacent positions in x and y are given by sx and sy respectively.
For 1D maps (where exactly only one of xmap or ymap is present) there are nx (or ny) photon counts listed on each line, in addition to the wavelength. This corresponds to a map over a line of length (nx-1)*sx micrometres.
For 2D maps (where both xmap and ymap are present) there are nx*ny photon counts listed on each line. The first nx values correspond to y=1. The next nx values correspond to y=2. This pattern continues up to and including y=ny.
For example, a 2D map named "sample1_xmap(4,0.5)_ymap(3,0.5).asc" would contain the following data:
wavelength_1 x1y1 x2y1 x3y1 x4y1 x1y2 x2y2 x3y2 x4y2 x1y3 x2y3 x3y3 x4y3
wavelength_2 x1y1 x2y1 x3y1 x4y1 x1y2 x2y2 x3y2 x4y2 x1y3 x2y3 x3y3 x4y3
wavelength_3 x1y1 x2y1 x3y1 x4y1 x1y2 x2y2 x3y2 x4y2 x1y3 x2y3 x3y3 x4y3
wavelength_4 x1y1 x2y1 x3y1 x4y1 x1y2 x2y2 x3y2 x4y2 x1y3 x2y3 x3y3 x4y3
wavelength_5 x1y1 x2y1 x3y1 x4y1 x1y2 x2y2 x3y2 x4y2 x1y3 x2y3 x3y3 x4y3
...
where wavelength_# is a wavelength in nm and x#y# is a photon count. The map would cover an area of 1.5 by 1 micrometres. 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. |
| first_indexed | 2024-03-07T02:17:48Z |
| format | Dataset |
| id | oxford-uuid:a2de127d-e2d6-4da4-af9a-d8f3914abe73 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:17:48Z |
| publishDate | 2017 |
| publisher | University of Oxford |
| record_format | dspace |
| spelling | oxford-uuid:a2de127d-e2d6-4da4-af9a-d8f3914abe732022-03-27T02:22:56ZDataset: Optical Fabrication and Characterisation of SU-8 Disk Photonic Waveguide Heterostructure CavitiesDatasethttp://purl.org/coar/resource_type/c_ddb1uuid:a2de127d-e2d6-4da4-af9a-d8f3914abe73EnglishORA DepositUniversity of Oxford2017Nuttall, LLennon, SBrossard, FTaylor, RTaylor, RThese 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. ===================================================== .asc files contain micro-photoluminescence spectroscopy data for one or more positions on the sample. The values on each line of the file are separated by tab characters. All values in the file are numeric. Each line corresponds to a particular wavelength. The first value in each line gives the wavelength in nm. Subsequent values give the number of photons detected by the CCD at that wavelength. If the filename contains "xmap(nx,sx)" and/or "ymap(ny,sy)", where nx, ny, sx and sy are arbitrary numbers, then the file contains a map over an area of the sample. The number of points in x and y are given by nx and ny respectively. The physical separation in micrometres between adjacent positions in x and y are given by sx and sy respectively. For 1D maps (where exactly only one of xmap or ymap is present) there are nx (or ny) photon counts listed on each line, in addition to the wavelength. This corresponds to a map over a line of length (nx-1)*sx micrometres. For 2D maps (where both xmap and ymap are present) there are nx*ny photon counts listed on each line. The first nx values correspond to y=1. The next nx values correspond to y=2. This pattern continues up to and including y=ny. For example, a 2D map named "sample1_xmap(4,0.5)_ymap(3,0.5).asc" would contain the following data: wavelength_1 x1y1 x2y1 x3y1 x4y1 x1y2 x2y2 x3y2 x4y2 x1y3 x2y3 x3y3 x4y3 wavelength_2 x1y1 x2y1 x3y1 x4y1 x1y2 x2y2 x3y2 x4y2 x1y3 x2y3 x3y3 x4y3 wavelength_3 x1y1 x2y1 x3y1 x4y1 x1y2 x2y2 x3y2 x4y2 x1y3 x2y3 x3y3 x4y3 wavelength_4 x1y1 x2y1 x3y1 x4y1 x1y2 x2y2 x3y2 x4y2 x1y3 x2y3 x3y3 x4y3 wavelength_5 x1y1 x2y1 x3y1 x4y1 x1y2 x2y2 x3y2 x4y2 x1y3 x2y3 x3y3 x4y3 ... where wavelength_# is a wavelength in nm and x#y# is a photon count. The map would cover an area of 1.5 by 1 micrometres. 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. |
| spellingShingle | Nuttall, L Lennon, S Brossard, F Dataset: Optical Fabrication and Characterisation of SU-8 Disk Photonic Waveguide Heterostructure Cavities |
| title | Dataset: Optical Fabrication and Characterisation of SU-8 Disk Photonic Waveguide Heterostructure Cavities |
| title_full | Dataset: Optical Fabrication and Characterisation of SU-8 Disk Photonic Waveguide Heterostructure Cavities |
| title_fullStr | Dataset: Optical Fabrication and Characterisation of SU-8 Disk Photonic Waveguide Heterostructure Cavities |
| title_full_unstemmed | Dataset: Optical Fabrication and Characterisation of SU-8 Disk Photonic Waveguide Heterostructure Cavities |
| title_short | Dataset: Optical Fabrication and Characterisation of SU-8 Disk Photonic Waveguide Heterostructure Cavities |
| title_sort | dataset optical fabrication and characterisation of su 8 disk photonic waveguide heterostructure cavities |
| work_keys_str_mv | AT nuttalll datasetopticalfabricationandcharacterisationofsu8diskphotonicwaveguideheterostructurecavities AT lennons datasetopticalfabricationandcharacterisationofsu8diskphotonicwaveguideheterostructurecavities AT brossardf datasetopticalfabricationandcharacterisationofsu8diskphotonicwaveguideheterostructurecavities |