Wide bandgap optoelectronics

We develop ultraviolet and visible light emitters with a focus on microcavity lasers and thin-film flip-chip LEDs.

Group members:

Professor
Åsa Haglund

Associate Prof.
Jörgen Bengtsson
Johan Gustavsson​

Post-docs
Joachim Ciers​  

PhD students
Michael Bergmann
Filip Hjort

Master students
Mahdi Mohajeri​​
Lars Persson


Alumni:

PhD

Ehsan Hashemi, “Optical Guiding and Feedback in Gallium Nitride Based Vertical Cavity Surface Emitting Lasers”, PhD 2016. Present affiliation: Tobii​
Martin Stattin, “Elements of AlGaN-Based Light Emitters” PhD 2013. Present affiliation: II-VI​

Master students
Giulia Cardinali , ” Thermal management of ultraviolet LEDs and VCSELs: computer-aided multiphysics optimization”, 2019
Saeed Taheri, “Probing optical properties of nano-structured materials by measuring micro-reflectivity spectrum”, 2018
Marcus Bengths, “Design of nanowire-based vertical-cavity surface-emitting lasers”​, 2018
Filip Hjort, “Electrical Conductivity of n-doped GaN-based Distributed Bragg Reflectors”, 2016
Wei Wang, “Direct integration of CVD graphene on p-GaN as transparent conductive films for light-emitting diodes”, 2016
Rickard Andersson, “Investigation of electrical contacts on n-type 4H-SiC”, 2015
Salwa Salam Cynthia, “TiO2/SiO2 Distributed Bragg Reflectors by Sputtering for GaAs based VCSELs”, 2014 
Marcus Johansson, “HfO2/SiO2 Distributed Bragg Reflectors for GaN-based VCSELs”, 2013
Stefan Carlsson, “Towards High Contrast Gratings in the GaN/ZnO Materials System”, 2013
César Javier Lockhart de la Rosa, “Graphene as Transparent Conductive Film for GaN-Based Vertical Cavity Surface Emitting Lasers”​, 2012                

Guests
Giulia Cardinali, Politecnico di Torino (Italy), 2019
Johannes Enslin, TUB (Germany)​​, 2019
TsuChi Chang, NCTU (Taiwan), 2018


Highlights in media:

MC2 researcher gets major grant from The European Research Council, 10 Dec., 2019
https://www.chalmers.se/en/departments/mc2/news/Pages/MC2-researcher-gets-major-grant-from-The-European-Research-Council.aspx​

Semiconductor Today, 28 Nov., 2019 
"E
lectrochemical membrane release for aluminium gallium nitride devices”
http://www.semiconductor-today.com/news_items/2019/nov/chalmers-281119.shtml​

Elektroniktidningen, 12 June 2019 
”Chalmers lyfter UV-lysdioden ifrån substratet”
http://www.etn.se/index.php/65903

Framtidens forskning, 26 June, 2018
http://framtidensforskning.se/presentation/ny-laserteknik-oppnar-en-helt-ny-varld-av-mojligheter/

Elektroniktidningen, 8 Feb., 2017
“On the way towards blue surface emitting laser”
http://etn.se/index.php/reportage/63496-visar-vaegen-mot-bla-ytemitterande-laser-2
“Mot blå ytemitterande laser”
http://etn.se/index.php/nyheter/63170-visar-vaegen-mot-bla-ytemitterande-laser​, Anna Wennberg

Youtube video by the Foundation for Strategic Research, 2017.
”Blue lasers might become the future lighting”, https://www.youtube.com/watch?v=YEe30yg-nuA
“Blå lasrar kan bli framtidens belysning”, https://www.youtube.com/watch?v=7-a299Vtr4w&t=19s​​​





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Carl Tryggers stiftelse​
 

Published: Thu 09 Jan 2020.