Filip Hjort

Showing 43 publications

2023

The quest for ultraviolet vertical-cavity surface-emitting lasers

Åsa Haglund, Filip Hjort, Johannes Enslin et al
2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023
Paper in proceeding
2023

Increased Light Extraction of Thin-Film Flip-Chip UVB LEDs by Surface Texturing

Michael Alexander Bergmann, Johannes Enslin, Martin Guttmann et al
ACS Photonics. Vol. 10 (2), p. 368-373
Journal article
2023

Athermalization of the Lasing Wavelength in Vertical-Cavity Surface-Emitting Lasers

Lars Persson, Filip Hjort, G. Cardinali et al
Laser and Photonics Reviews. Vol. 17 (8)
Journal article
2022

Influence of detuning and surface roughness on the lasing threshold of optically pumped UVB VCSELs

Giulia Cardinali, Filip Hjort, Nando Prokop et al
Other conference contribution
2022

Out of the blue: UV VCSELs

Åsa Haglund, Filip Hjort, Johannes Enslin et al
Proceedings of SPIE - The International Society for Optical Engineering. Vol. PC12001
Paper in proceeding
2022

Electrochemical etching – a key enabler for thin-film VCSELs and LEDs?

Åsa Haglund, Filip Hjort, Johannes Enslin et al
GaN Marathon
Paper in proceeding
2022

Low-Threshold AlGaN-based UVB VCSELs enabled by post-growth cavity detuning

G. Cardinali, Filip Hjort, N. Prokop et al
Applied Physics Letters. Vol. 121 (10)
Journal article
2022

Thin-film UV VCSELs and LEDs by electrochemical etching

Åsa Haglund, Filip Hjort, Johannes Enslin et al
Proceedings of SPIE - The International Society for Optical Engineering. Vol. PC12022
Paper in proceeding
2022

Blue and UV VCSELs: today and tomorrow

Åsa Haglund, Giulia Cardinali, Lars Persson et al
Other conference contribution
2022

UV VCSELs – this is the way

Åsa Haglund, Giulia Cardinali, Lars Persson et al
9th Workshop on Physics and Technology of Semiconductor Lasers
Paper in proceeding
2022

Single-mode lasing in optically pumped UVB VCSELs with circular relief structures

Giulia Cardinali, Filip Hjort, Joachim Ciers et al
International Workshop on Nitride semiconductors (IWN)
Paper in proceeding
2021

Advances in ultraviolet-emitting vertical-cavity surface-emitting lasers

Filip Hjort, Johannes Enslin, Munise Cobet et al
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 11686
Paper in proceeding
2021

A 310 nm Optically Pumped AlGaN Vertical-Cavity Surface-Emitting Laser

Filip Hjort, Johannes Enslin, Munise Cobet et al
ACS Photonics. Vol. 8 (1), p. 135-141
Journal article
2021

Out of the blue: ultraviolet vertical-cavity surface-emitting lasers

Åsa Haglund, Filip Hjort, Johannes Enslin et al
Other conference contribution
2021

Impact of polarization fields on electrochemical lift-off of GaN membranes

Joachim Ciers, Michael Alexander Bergmann, Filip Hjort et al
Other conference contribution
2021

Monolithic high-index contrast grating mirror for a GaN-based vertical-cavity surface-emitting laser

Kuo Bin Hong, Tsu Chi Chang, Filip Hjort et al
Photonics Research. Vol. 9 (11), p. 2214-2221
Journal article
2021

Impact of Stripe Shape on the Reflectivity of Monolithic High Contrast Gratings

Magdalena Marciniak, Tsung Scheng Chang, Tien Chang Lu et al
ACS Photonics. Vol. 8 (11), p. 3173-3184
Journal article
2021

Smooth GaN membranes by polarization-assisted electrochemical etching

Joachim Ciers, Michael Alexander Bergmann, Filip Hjort et al
Applied Physics Letters. Vol. 118 (6)
Journal article
2020

Prospects and challenges for UV LEDs and UV lasers with tunnel junctions

Tim Wernicke, Luca Sulmoni, Martin Guttmann et al
SPIE Photonics West, OE107: Gallium nitride materials and devices XV
Other conference contribution
2020

Recent progress for blue VCSELs and challenges to move to UV

Åsa Haglund, Filip Hjort, Johannes Enslin et al
Other conference contribution
2020

Thin-film flip-chip UVB LEDs realized by electrochemical etching

Michael Alexander Bergmann, Johannes Enslin, Filip Hjort et al
Applied Physics Letters. Vol. 116 (12), p. 121101-
Journal article
2020

A 310 nm optically pumped AlGaN VCSEL with two dielectric distributed Bragg reflectors

Filip Hjort, Johannes Enslin, Munise Cobet et al
Other conference contribution
2020

Are blue and ultraviolet VCSELs a reality or just a dream?

Åsa Haglund, Filip Hjort, Johannes Enslin et al
Other conference contribution
2020

Optical microprism cavities based on dislocation-free GaN

Filip Hjort, Maryam Khalilian, Jörgen Bengtsson et al
Applied Physics Letters. Vol. 117 (23)
Journal article
2019

UVB-emitting vertical-cavity surface-emitting lasers

Filip Hjort, Johannes Enslin, Michael Alexander Bergmann et al
Other conference contribution
2019

Electrochemical etching of AlGaN for the realization of thin-film devices

Michael Alexander Bergmann, Johannes Enslin, Rinat Yapparov et al
Applied Physics Letters. Vol. 115 (18), p. 182103-
Journal article
2019

UVB-emitting vertical-cavity surface-emitting laser

Åsa Haglund, Filip Hjort, Michael Alexander Bergmann et al
Other conference contribution
2019

Blue and ultraviolet thin-film light emitters

Åsa Haglund, Michael Alexander Bergmann, Filip Hjort et al
Other conference contribution
2019

Blue and ultraviolet vertical-cavity surface-emitting lasers

Åsa Haglund, Michael Alexander Bergmann, Filip Hjort et al
Optics InfoBase Conference Papers. Vol. Part F129-CLEO_SI 2019
Paper in proceeding
2019

Growth of dislocation-free and atomically flat III-nitride micro-prisms

Maryam Khalilian, Filip Hjort, Filip Lenrick et al
Other conference contribution
2019

Pushing performance in blue and UV VCSELs by nanometer structuring

Åsa Haglund, Filip Hjort, Michael Alexander Bergmann et al
Other conference contribution
2019

Quality factors of vertical cavities based on dislocation-free and atomically flat III-nitride hexagonal micro-prisms

Filip Hjort, Maryam Khalilian, Filip Lenrick et al
Other conference contribution
2019

Vertical AlGaN-microcavity with two dielectric distributed Bragg reflectors emitting at 330 nm

Filip Hjort, Johannes Enslin, Michael Alexander Bergmann et al
Other conference contribution
2019

Vertical microcavity based on an AlGaN membrane with two dielectric distributed Bragg reflectors emitting at 330 nm

Filip Hjort, Johannes Enslin, Michael Alexander Bergmann et al
Other conference contribution
2019

Prospects and challenges for UV LEDs and UV lasers with tunnel junctions

Tim Wernicke, Luca Sulmoni, Martin Guttmann et al
Other conference contribution
2018

Vertical Electrical Conductivity of ZnO/GaN Multilayers for Application in Distributed Bragg Reflectors

Filip Hjort, Seyed Ehsan Hashemi, David Adolph et al
IEEE Journal of Quantum Electronics. Vol. 54 (4)
Journal article
2018

Towards ultraviolet and blue microcavity lasers

Michael Alexander Bergmann, Filip Hjort, Seyed Ehsan Hashemi et al
Northen Optics and Photonics conference. Vol. 2018
Paper in proceeding
2018

Thin-film UVB LEDs enabled by electrochemical etching of AlGaN

Michael Alexander Bergmann, Johannes Enslin, Filip Hjort et al
Other conference contribution
2017

Effect of compositional interlayers on the vertical electrical conductivity of Si-doped AlN/GaN distributed Bragg reflectors grown on SiC''

Seyed Ehsan Hashemi, Filip Hjort, Martin Stattin et al
Applied Physics Express. Vol. 10 (5), p. 055501-
Journal article
2017

Electrically conductive ZnO/GaN distributed Bragg reflectors grown by hybrid plasma-assisted molecular beam epitaxy

Filip Hjort, Seyed Ehsan Hashemi, David Adolph et al
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 10104, p. 1010413-1
Paper in proceeding
2017

Nanoscale structuring to improve laser performance

Åsa Haglund, Seyed Ehsan Hashemi, Filip Hjort et al
Proceedings of the Stanford Chalmers Workshop on Advancing Materials Innovatively. Vol. 2017
Paper in proceeding

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