Åsa Haglund
Åsa Haglund received the M.Sc. degree in physics from Göteborg University Göteborg, Sweden, in 2000, and the Ph.D. degree in electrical engineering from the Chalmers University of Technology, Göteborg, in 2005.
She was engaged in mode and polarization control in vertical-cavity surface-emitting lasers (VCSELs) using surface structures. She is currently Professor at the Photonics Laboratory, Chalmers University of Technology. Her current research interests include VCSELs and III-nitride-based light emitters.
Showing 158 publications
The quest for ultraviolet vertical-cavity surface-emitting lasers
Increased Light Extraction of Thin-Film Flip-Chip UVB LEDs by Surface Texturing
UVC photonic crystal surface-emitting lasers with low-divergent far-fields
Optically Pumped UVC Photonic Crystal Surface-Emitting Laser
Athermalization of the Lasing Wavelength in Vertical-Cavity Surface-Emitting Lasers
Thermal Transport in c-plane GaN Membranes Characterized by Raman Thermometry
Membrane-based VCSELs and LEDs by electrochemical etching
Electrochemical etching – a key enabler for thin-film VCSELs and LEDs?
Introduction to the JSTQE Special Issue on Semiconductor Lasers
Thin-film flip-chip UVB LEDs realized by electrochemical etching
Low-Threshold AlGaN-based UVB VCSELs enabled by post-growth cavity detuning
The past, the present and the future of III-nitride VCSELs
Electrochemical etching - a key enabler for III-nitride VCSELs and LEDs?
Thin-film UV VCSELs and LEDs by electrochemical etching
Blue and UV VCSELs: today and tomorrow
Single-mode lasing in optically pumped UVB VCSELs with circular relief structures
Advances in ultraviolet-emitting vertical-cavity surface-emitting lasers
A 310 nm Optically Pumped AlGaN Vertical-Cavity Surface-Emitting Laser
Out of the blue: ultraviolet vertical-cavity surface-emitting lasers
Impact of polarization fields on electrochemical lift-off of GaN membranes
Monolithic high-index contrast grating mirror for a GaN-based vertical-cavity surface-emitting laser
Impact of Stripe Shape on the Reflectivity of Monolithic High Contrast Gratings
Membrane-based VCSELs and LEDs from the blue to the ultraviolet wavelength regime
Smooth GaN membranes by polarization-assisted electrochemical etching
Prospects and challenges for UV LEDs and UV lasers with tunnel junctions
Recent progress for blue VCSELs and challenges to move to UV
Thin-film flip-chip UVB LEDs realized by electrochemical etching
A 310 nm optically pumped AlGaN VCSEL with two dielectric distributed Bragg reflectors
Are blue and ultraviolet VCSELs a reality or just a dream?
GaN-based vertical-cavity surface-emitting laser incorporating a TiO2 high-index-contrast grating
Optical microprism cavities based on dislocation-free GaN
Electrochemical etching of AlGaN for the realization of thin-film devices
UVB-emitting vertical-cavity surface-emitting laser
Blue and ultraviolet thin-film light emitters
Blue and ultraviolet vertical-cavity surface-emitting lasers
Growth of dislocation-free and atomically flat III-nitride micro-prisms
Pushing performance in blue and UV VCSELs by nanometer structuring
Vertical AlGaN-microcavity with two dielectric distributed Bragg reflectors emitting at 330 nm
Prospects and challenges for UV LEDs and UV lasers with tunnel junctions
Towards ultraviolet and blue microcavity lasers
Should we strive to follow Nature’s checklist on how to claim lasing?
GaN vertical-cavity surface-emitting laser with a high-contrast grating reflector
Lasing Action in GaN-Based VCSELs with top High-Contrast Grating Reflectors
Thin-film UVB LEDs enabled by electrochemical etching of AlGaN
Multi-wavelength VCSEL arrays using high-contrast gratings
Nanoscale structuring to improve laser performance
Wavelength Control of VCSELs using High-Contrast Gratings
Progress and challenges in electrically pumped GaN-based VCSELs
Demonstration of post-growth wavelength setting of VCSELs using high-contrast gratings
GaAs High-Contrast Gratings with InGaP Sacrificial Layer for Multi-Wavelength VCSEL Arrays
Air-suspended TiO2-based HCG reflectors for visible spectral range
Demonstration of post-growth wavelength control of VCSELs using high-contrast gratings
Integration of GaAs-based VCSEL array on SiN platform with HCG reflectors for WDM applications
Triggering of guiding and antiguiding effects in GaN-based VCSELs
High-contrast gratings for WDM VCSEL arrays
Quasi-single mode VCSELs for longer-reach multimode fiber optical interconnects
High speed 850nm VCSELs for >40Gb/s transmission
Metal-Free Graphene as Transparent Electrode for GaN-Based Light-Emitters
High-speed, high-temperature VCSELs for optical interconnects
850 nm datacom VCSELs for higher-speed and longer-reach transmission
High-speed lasers for optical interconnects
Polarization investigation of a tunable high-speed short-wavelength bulk-micromachined MEMS-VCSEL
Graphene as transparent electrode for GaN-based VCSELs
Reducing the spectral width of high speed oxide confined VCSELs using an integrated mode filter
25 Gbit/s transmission over 500 m multimode fibre using 850 nm VCSEL with integrated mode filter
High speed VCSELs for optical interconnects
Integrated MEMS-Tunable VCSELs Using a Self-Aligned Reflow Process
4-PAM for high-speed short-range optical communications
Mode-filtered semiconductor lasers enable longer-reach optical interconnects
High-speed tunable and fixed-wavelength VCSELs for short-reach optical links and interconnects
Integrated MEMS-tunable VCSELs for reconfigurable optical interconnects
Engineering the transverse optical guiding in GaN-based VCSELs to avoid detrimental optical loss
Impact of photon lifetime on thermal rollover in 850-nm high-speed VCSELs
Impact of device parameters on thermal performance of high speed oxide confined 850 nm VCSELs
High speed VCSELs for short reach communication
Growth of dilute nitrides and 1.3 μm edge emitting lasers on GaAs by MBE
High speed VCSELs for short reach communication
30 Gbps 4-PAM transmission over 200m of MMF using an 850 nm VCSEL
Singlemode tunable VCSELs with integrated MEMS technology
Assessment of VCSEL thermal rollover mechanisms from measurements and empirical modeling
Higher speed VCSELs by photon lifetime reduction
30 Gbps 4-PAM transmission over 200m of MMF using an 850 nm VCSEL
Orthogonal multipulse modulation for next-generation datacommunication links
Tuneable VCSEL aiming for the application in interconnects and short haul systems
32 Gb/s multilevel modulation of an 850 nm VCSEL for next-generation datacommunication standards
Impact of Photon Lifetime on High-Speed VCSEL Performance
Low Spectral Width High-Speed VCSELs
Integrated MEMS-tunable VCSELs with high modulation bandwidth
Advances in VCSELs for Communication and Sensing
Active Region Design for High-Speed 850-nm VCSELs
Integrated Tunable VCSELs With Simple MEMS Technology
40 Gbit/s error-free operation of oxide-confined 850 nm VCSEL
850 nm VCSEL Operating Error-Free at 40 Gbit/s
Mg-doped Al0.85Ga0.15N layers grown by hot-wall MOCVD with low resistivity at room temperature
High speed low current density 850 nm VCSELs
High-speed 850-nm VCSELs for 40 Gb/s transmission
Speed enhancement of VCSELs by photon lifetime reduction
Short-wavelength tunable VCSELs
High speed large aperture 850 nm VCSELs
High speed VCSELs for broadband interconnects
Widely tuneable micromachined VCSELs – new results
A 1.31 μm GaInNAs Triple Quantum Well Laser with 13 GHz Small Signal Modulation Bandwidth
32 Gb/s transmission experiments using high speed 850 nm VCSELs
Impedance characteristics and parasitic speed limitations of high speed 850 nm VCSELs
13 GHz Bandwidth of 1.31 μm GaInNAs Triple Quantum Well Lasers
32 Gbit/s multimode fibre transmission using high-speed, low current density 850 nm VCSEL
Optimized active region design for high speed 850 nm VCSELs
High speed, low current density 850 nm VCSELs
VCSELs for broadband access and interconnects
A high-speed laser for future data-communication links
Large aperture 850 nm VCSELs operating at bit rates up to 25 Gbit/s
Large aperture 850 nm VCSEL operating at 28 Gbit/s
Mode and polarization control in VCSELs using shallow surface structures
Spatio-temporal turn-on dynamics of grating relief VCSELs
VCSELs for microwave fiber optic links
WCDMA radio-over-fibre transmission experiment using singlemode VCSEL and multimode fibre
High power single mode VCSELs for emerging applications
High Frequency Modulation and Bandwidth Limitations of GaInNAs Double Quantum Well Lasers
High-power single-mode and polarization stabilized VCSELs using a sub-wavelength surface grating
Dynamic mode stability analysis of single-mode VCSELs using a shallow surface relief
High Frequency Modulation and Bandwidth Limitations of GaInNAs Double Quantum Well Lasers
Dynamic mode stability analysis of surface relief VCSELs under strong RF modulation
Dynamic behavior of fundamental-mode stabilized VCSELs using a shallow surface relief
Broadband direct modulation of VCSELs and applications in fiber optic RF links
Single fundamental mode output power exceeding 6 mW from VCSELs with a shallow surface relief
Direct high-frequency modulation of VCSELs and applications to fibre optic RF and microwave links
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Showing 6 research projects
Microcavity laser breakthrough for ultraviolet light (UV-LASE)
Ultravioletta och blå mikrokavitetslasrar
Växt av avancerade III-nitrid halvledarstrukturer med molekylstråleepitaxi
UV-blue-green resonant light-emitters