Data · dataset · 2026
Engineering laser modes in VCSELs with structured cavity
Listed in ZivaHub and Deakin Research Online and DMU Figshare — shown once because both records carry DOI 10.17034/32638920.v1
Thanks to their small footprint and relative low fabrication and integration costs, vertical cavity surface emitting lasers (VCSELs) are popular laser devices for large volume datacom and consumer applications.
Description
The properties of a laser beam such as spectrum, polarization and beam divergence are associated with the laser modes which resonate inside the laser optical cavity. While the longitudinal mode in VCSELs is well controlled by the distance between the bottom and top distributed Bragg reflectors (DBRs), VCSELs typically operate on multiple transverse modes due to their wide aperture (several μm).
Difficulties in controlling VCSEL transverse modes remains a barrier for potential applications. The work presented in this thesis proposes to control the laser mode properties of 940 nm VCSELs by adjusting the cavity geometry. To do so, the epitaxial structure of the VCSEL is grown in two subsequent growths with a processing step in between to structure layers inside the cavity.
Read the rest (2 more)
In combination with an oxide aperture, the definition of a grating inside the cavity allows the control of the emission wavelength. Additionally, the anisotropy of the intra-cavity grating sets the linear polarization direction. Forming a buried tunnel junction lithographic aperture allows simultaneous confinement of light and current, eliminating the need for a mesa and an oxide aperture.
The high resolution of the lithographic aperture guarantees the reproducibility of small emitters with a narrow emitter-to-emitter pitch and enables the manufacture of coupled emitter arrays.<br><br><i>Thesis is embargoed until 31 July 2027</i>.
Links
Where it is published
- DOI doi.org/10.17034/32638920.v1 ↗
DOI / persistent id · from zivahub uct ac za
Catalogue records · 1
- OAI-PMH record api.figshare.com/v2/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai%3Af… ↗
metadata API · from zivahub uct ac za
Topics
- From keywords
- Earth & Environmental Science · Earth & Environmental Science · Earth & Environmental Science
- Inferred from text
- Longitudinal study 65%
Provenance · 3 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| ZivaHub | oai:figshare.com:article/32638920 | 11 d ago | JSON v1 |
| Deakin Research Online | oai:figshare.com:article/32638920 | 11 d ago | JSON v1 |
| DMU Figshare | oai:figshare.com:article/32638920 | 11 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · figshare dmu ac uk | connector:figshare_dmu_ac_uk@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · dro deakin edu au | connector:dro_deakin_edu_au@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | |
| concepts[method].local:method:longitudinal-study | enrichment · zivahub uct ac za | keyword-concept-rules@1.0.0 | title+description (65%) |
| description | source · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | /metadata/dc/description |
| license_text | source · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | |
| publication_date | source · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | |
| title | source · zivahub uct ac za | connector:zivahub_uct_ac_za@1.0.0 | /metadata/dc/title |