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Research Output 1998 2019

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Article
2006
3 Citations (Scopus)
membrane structures
etching
quantum wells
silicon
membranes
11 Citations (Scopus)

Microfabrication in free-standing gallium nitride using UV laser micromachining

Gu, E., Howard, H., Conneely, A., O'Connor, G. M., Illy, E. K., Knowles, M. R. H., Edwards, P. R., Martin, R. W., Watson, I. M. & Dawson, M. D., 2006, In : Applied Surface Science. 252, 13, p. 4897-4901 5 p.

Research output: Contribution to journalArticle

Ultraviolet lasers
Gallium nitride
Microfabrication
Micromachining
Machining
20 Citations (Scopus)

Microstripe-array InGaN light-emitting diodes with individually addressable elements

Zhang, H. X., Gu, E., Jeon, C. W., Gong, Z., Dawson, M. D., Neil, M. A. A. & French, P. M. W., Aug 2006, In : IEEE Photonics Technology Letters. 18, 15, p. 1681-1683 2 p.

Research output: Contribution to journalArticle

Ultraviolet devices
Optical microscopy
Light emitting diodes
light emitting diodes
Lighting
1 Citation (Scopus)

Slow-light in a 1300nm GaInNAs vertical-cavity semiconductor optical amplifier

Laurand, N., Calvez, S., Dawson, M. D. & Kelly, A. E., 2006, In : IEEE Journal of Quantum Electronics. 14, 15, p. 6858-6863 5 p.

Research output: Contribution to journalArticle

Slow light
Group delay
Semiconductor optical amplifiers
light amplifiers
Demonstrations
20 Citations (Scopus)

Slow-light in a vertical-cavity semiconductor optical amplifier

Laurand, N., Calvez, S., Dawson, M. & Kelly, A., 24 Jul 2006, In : Optics Express. 14, 15, p. 6858-6863 5 p.

Research output: Contribution to journalArticle

light amplifiers
cavities
bandwidth
products
21 Citations (Scopus)

Spectral narrowing and locking of a vertical external cavity surface-emitting laser using an intracavity volume Bragg grating

Giet, S., Sun, H. D., Calvez, S., Dawson, M. D., Suomalainen, S., Guina, M., Okhotnikov, O. & Pessa, M., 2006, In : IEEE Photonics Technology Letters. 18, 6, p. 1786-1788 3 p.

Research output: Contribution to journalArticle

Diamond
Bragg gratings
Surface emitting lasers
surface emitting lasers
locking
20 Citations (Scopus)

Thermal lensing, thermal management and transverse mode control in microchip VECSELs

Kemp, A., MacLean, A. J., Hastie, J. E., Smith, S. A., Hopkins, J. M., Calvez, S., Valentine, G. J., Dawson, M. D. & Burns, D., 2006, In : Applied Physics B: Lasers and Optics. 83, p. 189-194 5 p.

Research output: Contribution to journalArticle

thermal lensing
sapphire
surface emitting lasers
diamonds
slopes
21 Citations (Scopus)

Thermal quenching mechanism of photoluminescence in 1.55 µm GaInNAsSb/Ga(N)As quantum-well structures

Sun, H. D., Calvez, S., Dawson, M. D., Gupta, J. A., Aers, G. C. & Sproule, G. I., 4 Sep 2006, In : Applied Physics Letters. 89, 10, 3 p., 101909.

Research output: Contribution to journalArticle

quenching
quantum wells
photoluminescence
conduction bands
valence
82 Citations (Scopus)

Tunable ultraviolet output from an intracavity frequency-doubled red vertical-external-cavity surface-emitting laser

Hastie, J. E., Morton, L. G., Kemp, A., Dawson, M. D., Krysa, A. B. & Roberts, J. S., 2006, In : Applied Physics Letters. 89, 6, p. 061114

Research output: Contribution to journalArticle

surface emitting lasers
birefringent filters
cavities
output
borates
24 Citations (Scopus)

Wavelength-tunable and white light emission from polymer-converted micropixellated InGaN ultraviolet light-emitting diodes

Heliotis, G., Gu, E., Griffin, C., Jeon, C. W., Stavrinou, P. N., Dawson, M. D. & Bradley, D. D. C., 2006, In : Journal of Optics A: Pure and Applied Optics. 8, 7, p. S445-S449

Research output: Contribution to journalArticle

ultraviolet radiation
light emission
light emitting diodes
polymer blends
polymers
2005

1.3µm continuously-tunable fibre-coupled GaInNAs VCSEL

Laurand, N., Calvez, S., Dawson, M. D., Jouhti, T., Kontinnen, J. & Pessa, M., 22 May 2005, In : Conference on Lasers and Electro-Optics. CW15

Research output: Contribution to journalArticle

fibers
output
room temperature
32 Citations (Scopus)

Beam divergence measurements of InGaN/GaN micro-array light-emitting diodes using confocal microscopy

Griffin, C., Gu, E., Choi, H. W., Jeon, C. W., Girkin, J. M., Dawson, M. D. & McConnell, G., 24 Jan 2005, In : Applied Physics Letters. 86, 4

Research output: Contribution to journalArticle

Open Access
File
divergence
light emitting diodes
microscopy
micrometers
output
9 Citations (Scopus)

Effect of multilayer barriers on the optical properties of GaInNAs single quantum-well structures grown by metalorganic vapor phase epitaxy

Sun, H. D., Clark, A. H., Calvez, S., Dawson, M. D., Kim, K. S., Kim, T. & Park, Y. J., 2005, In : Applied Physics Letters. 87, p. 1-3 3 p., 021903.

Research output: Contribution to journalArticle

File
vapor phase epitaxy
quantum wells
optical properties
wavelengths
quantum efficiency

Enhanced areal efficiency from 370nm AlGaN micro-ring light emitting diodes

Choi, H. W. & Dawson, M. D., 2005, In : Physica Status Solidi C. 2, 7, p. 2854-2857 3 p.

Research output: Contribution to journalArticle

light emitting diodes
rings
light emission
high current
geometry
22 Citations (Scopus)

Fabrication and evaluation of GaN negative and bifocal microlenses

Choi, H. W., Gu, E., Liu, C., Girkin, J. M. & Dawson, M. D., 2005, In : Journal of Applied Physics. 97, 063101

Research output: Contribution to journalArticle

lenses
fabrication
evaluation
photoresists
sapphire
34 Citations (Scopus)

Fabrication of natural diamond microlenses by plasma etching

Choi, H. W., Gu, E., Liu, C., Griffin, C., Girkin, J. M., Watson, I. M. & Dawson, M. D., 2005, In : Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures. 23, 1, p. 130-132 2 p.

Research output: Contribution to journalArticle

Microlenses
Plasma etching
plasma etching
Diamonds
diamonds
7 Citations (Scopus)

Fiber-tunable dilute-nitride VCSEL

Laurand, N., Calvez, S., Dawson, M. D., Jouhti, T., Kontinnen, J. & Pessa, M., 2005, In : Physica Status Solidi C. 2, 11, p. 3895-3898 3 p.

Research output: Contribution to journalArticle

nitrides
communication
cavities
fibers
optical communication
120 Citations (Scopus)

High power CW red VECSEL with linearly polarized TEM00 output beam

Hastie, J. E., Calvez, S., Dawson, M. D., Leinonen, T., Laakso, A., Lyytikainen, J. & Pessa, M., 2005, In : Optics Express. 13, 1, p. 77-81 4 p.

Research output: Contribution to journalArticle

birefringent filters
cavities
output
laser outputs
surface emitting lasers
19 Citations (Scopus)

Impact of laser scribing for efficient device separation of LED components

Illy, E. K., Knowles, M. R. H., Gu, E. & Dawson, M. D., 2005, In : Applied Surface Science. 249, 1-4, p. 354-361 7 p.

Research output: Contribution to journalArticle

Light emitting diodes
Lasers
Aluminum Oxide
Sapphire
Substrates
14 Citations (Scopus)

Improved current spreading in 370nm AlGaN microring light emitting diodes

Choi, H. W. & Dawson, M. D., 2005, In : Applied Physics Letters. 86, 053504

Research output: Contribution to journalArticle

light emitting diodes
ring currents
geometry
microbalances
light emission
7 Citations (Scopus)

Index and gain dynamics of optically-pumped GaInNAs vertical-cavity semiconductor optical amplifiers

Laurand, N., Calvez, S., Dawson, M. D. & Kelly, A. E., 1 Dec 2005, In : Applied Physics Letters. 87, 231115, p. 231115-1-231115-3

Research output: Contribution to journalArticle

light amplifiers
amplifiers
cavities
pumps
depletion
7 Citations (Scopus)

Influence of composition diffusion on the band structures of InGaNAs/GaAs quantum wells investigated by the band-anticrossing model

Qiu, Y. N., Rorison, J. M., Sun, H. D., Calvez, S., Dawson, M. D. & Bryce, A. C., 5 Dec 2005, In : Applied Physics Letters. 87, 23, 3 p., 231112.

Research output: Contribution to journalArticle

quantum wells
optical transition
mass spectroscopy
photoluminescence
electronics
33 Citations (Scopus)

InGaN nano-ring structures for high-efficiency light emitting diodes

Choi, H. W., Jeon, C. W., Liu, C., Watson, I. M., Dawson, M. D., Edwards, P. R., Martin, R. W., Tripathy, S. & Chua, S. J., 2005, In : Applied Physics Letters. 86, 2, 3 p., 021101.

Research output: Contribution to journalArticle

Open Access
File
ring structures
light emitting diodes
Fresnel diffraction
cathodoluminescence
screening
8 Citations (Scopus)

Investigation of phase-separated electronic states in 1.5µm GaInNAs/GaAs heterostructures by optical spectroscopy

Sun, H. D., Clark, A. H., Calvez, S. & Dawson, M. D., Jan 2005, In : Journal of Applied Physics. 97, p. 1-5 5 p., 033517.

Research output: Contribution to journalArticle

File
quantum wells
electronics
wavelengths
spectroscopy
excitation
12 Citations (Scopus)

Low-loss GaInNAs saturable Bragg reflector for mode-locking of a femtosecond Cr/sup 4+/:forsterite-laser

McWilliam, A., Lagatsky, A. A., Leburn, C. G., Fischer, P., Brown, C. T. A., Sibbett, W., Valentine, G. J., Kemp, A., Calvez, S., Burns, D., Dawson, M. D. & Pessa, M., 2005, In : IEEE Photonics Technology Letters. 17, 11, p. 2292-2294 2 p.

Research output: Contribution to journalArticle

Bragg reflectors
Saturable absorbers
Laser mode locking
forsterite
Solid state lasers
37 Citations (Scopus)
ultraviolet radiation
light emitting diodes
masks
photomasks
matrices
5 Citations (Scopus)

Nitride micro-display with integrated micro-lenses

Choi, H. W., Gu, E., Girkin, J. M. & Dawson, M. D., 2005, In : Physica Status Solidi C. 2, p. 2903-2906 3 p.

Research output: Contribution to journalArticle

nitrides
lenses
matrices
sapphire
light emitting diodes
8 Citations (Scopus)

Performance comparison of GaInNAs vertical cavity semiconductor amplifiers

Laurand, N., Calvez, S., Dawson, M. D., Bryce, A. C., Jouhti, T., Kontinnen, J. & Pessa, M., May 2005, In : IEEE Journal of Quantum Electronics. 41, 5, p. 642-649 7 p.

Research output: Contribution to journalArticle

Semiconductor quantum wells
Semiconductor optical amplifiers
amplifiers
light amplifiers
quantum wells

Photoluminescence characteristics of 1.5um Ga(1-x)InxNyAs(1-y) / GaAs structures grown by molecular beam epitaxy

Sun, H. D., Calvez, S., Dawson, M. D., Gilet, P., Grenouillet, L. & Million, A., Jan 2005, In : Applied Physics A: Materials Science and Processing. 80, 1, p. 9-12 3 p.

Research output: Contribution to journalArticle

Molecular beam epitaxy
Semiconductor quantum wells
Photoluminescence
molecular beam epitaxy
quantum wells

Photoluminescence characterization of mid-infrared inNxAs1-x/In0.53Ga0.47/InP multiquantum wells with various n contents

Sun, H. D., Clark, A. H., Calvez, S., Dawson, M. D., Shih, D. K. & Lin, H. H., 2005, In : Applied Physics Letters. 87, p. 081908

Research output: Contribution to journalArticle

16 Citations (Scopus)

Polymer microlens arrays applicable to AllnGaN ultraviolet micro-light-emitting diodes

Jeon, C. W., Gu, E., Liu, C., Girkin, J. M. & Dawson, M. D., 2005, In : IEEE Photonics Technology Letters. 17, 9, p. 1887-1889 2 p.

Research output: Contribution to journalArticle

Microlenses
Light emitting diodes
Polymers
light emitting diodes
polymers
1 Citation (Scopus)

Properties of natural diamond microlenses fabricated by plasma etching

Choi, H. W., Gu, E., Liu, C., Griffin, C., Girkin, J. M., Watson, I. M. & Dawson, M. D., 2005, In : Industrial Diamond Review. 2005, 2, p. 29-32 3 p.

Research output: Contribution to journalArticle

Microlenses
Diamond
Plasma etching
Diamonds
Optical properties
19 Citations (Scopus)

Red microchip VECSEL array

Hastie, J. E., Morton, L. G., Calvez, S., Dawson, M. D., Leinonen, T., Pessa, M., Gibson, G. & Padgett, M. J., 2005, In : Optics Express. 13, 18, p. 7209-7214 5 p.

Research output: Contribution to journalArticle

dynamic control
output
optical pumping
light modulators
surface emitting lasers
15 Citations (Scopus)

Role of Sb in the growth and optical properties of 1.55um GaInN(Sb)As/GaNAs quantum-well structures grown by molecular beam epitaxy

Sun, H. D., Calvez, S., Dawson, M. D., Gupta, J. A., Sproule, G. I., Wasilewski, Z. R. & Wu, X., 31 Oct 2005, In : Applied Physics Letters. 87, 18, 3 p., 181908.

Research output: Contribution to journalArticle

molecular beam epitaxy
quantum wells
photoluminescence
optical properties
atoms
15 Citations (Scopus)

Roles for aluminium indium nitride insertion layers in fabrication of GaN-based microcavities

Bejtka, K., Rizzi, F., Edwards, P. R., Martin, R. W., Gu, E., Dawson, M. D., Watson, I. M., Sellers, I. R. & Semond, F., 4 Nov 2005, In : Physica Status Solidi A: Applications and Materials Science. 202, 14, p. 2648-2652 4 p.

Research output: Contribution to journalArticle

Microcavities
Aluminum
Nitrides
Indium
nitrides
67 Citations (Scopus)

Spectral conversion of InGaN ultraviolet microarray light-emitting diodes using fluorene-based red-, green-, blue-, and white-light emitting polymer overlayer films

Heliotis, G., Stavrinou, P. N., Bradley, D. D. C., Gu, E., Griffin, C., Jeon, C. W. & Dawson, M. D., 2005, In : Applied Physics Letters. 87, 103505

Research output: Contribution to journalArticle

ultraviolet radiation
light emitting diodes
polymers
fabrication
visible spectrum
3 Citations (Scopus)

Spectroscopic characterization of 1.3µm GaInNAs quantum-well structures grown by metal-organic vapor phase epitaxy

Sun, H. D., Clark, A. H., Calvez, S., Dawson, M. D., Qiu, Y. N., Rorison, J. M., Kim, K. S., Kim, T. & Park, Y. J., 2005, In : Applied Physics Letters. 86, p. 1-3 3 p., 092106.

Research output: Contribution to journalArticle

File
vapor phase epitaxy
quantum wells
metals
luminescence
photoluminescence
14 Citations (Scopus)
Dry etching
Etching
etching
Fabrication
fabrication
119 Citations (Scopus)

Thermal management in vertical-external-cavity surface-emitting lasers: Finite-element analysis of a heatspreader approach

Kemp, A., Valentine, G. J., Hopkins, J. M., Hastie, J. E., Smith, S. A., Calvez, S., Dawson, M. D. & Burns, D., 2005, In : IEEE Journal of Quantum Electronics. 41, 2, p. 148-155 7 p.

Research output: Contribution to journalArticle

Surface emitting lasers
surface emitting lasers
Temperature control
Thermal effects
Diamonds
35 Citations (Scopus)
Open Access
File
cavity resonators
insertion
ternary alloys
spacers
laminates
2004
141 Citations (Scopus)

0.6WCWGaInNAs vertical external-cavity surface emitting laser operating at 1.32um

Hopkins, J. M., Smith, S. A., Jeon, C. W., Sun, H. D., Burns, D., Calvez, S., Dawson, M. D., Jouhti, T. & Pessa, M., 2004, In : Electronics Letters. 40, 1, p. 30-31 1 p.

Research output: Contribution to journalArticle

Surface emitting lasers
Diamonds
Diodes
Single crystals
3 Citations (Scopus)

1.3-μm GaInNAs surface-normal devices

Calvez, S., Laurand, N., Smith, S. A., Clark, A. H., Hopkins, J. M., Sun, H. D., Dawson, M. D., Jouhti, T., Kontinnen, J. & Pessa, M., 27 Oct 2004, In : IEE Proceedings Optoelectronics. 151, 5, p. 442-446 5 p.

Research output: Contribution to journalArticle

Surface emitting lasers
Mirrors
cavities
surface emitting lasers
Semiconductor optical amplifiers
141 Citations (Scopus)

A 0.6W cW GaInNAs vertical external cavity surface-emitting laser at 1.32µm

Hopkins, J. M., Smith, S. A., Jeon, C-W., Sun, H. D., Burns, D., Calvez, S., Dawson, M. D., Jouhti, T. & Pessa, M., Jan 2004, In : Electronics Letters. 40, 1, p. 30-31 2 p.

Research output: Contribution to journalArticle

Surface emitting lasers
Diamonds
Diodes
Single crystals
41 Citations (Scopus)

Cathodoluminescence spectral mapping of III-nitride structures

Martin, R. W., Edwards, P. R., O'Donnell, K. P., Dawson, M. D., Jeon, C. W., Liu, C., Rice, G. R. & Watson, I. M., Mar 2004, In : Physica Status Solidi A - Applications and Materials Science. 201, 4, p. 665-672 8 p.

Research output: Contribution to journalArticle

Cathodoluminescence
cathodoluminescence
Nitrides
nitrides
Luminescence
40 Citations (Scopus)

Diamond-microchip GaInNAs vertical external-cavity surface-emitting laser operating CW at 1315nm

Smith, S. A., Hopkins, J. M., Hastie, J. E., Burns, D., Calvez, S., Dawson, M. D., Jouhti, T., Kontinnen, J., Pessa, M. & Institution of Engineering and Technology, 22 Jul 2004, In : Electronics Letters. 40, 15, p. 935-937 2 p.

Research output: Contribution to journalArticle

Surface emitting lasers
Diamonds
Diodes
Mirrors
Single crystals
4 Citations (Scopus)

Effects of rapid thermal annealing on the optical properties of low-loss 1.3um GaInNAs/GaAs saturable bragg reflectors

Sun, H. D., Macaluso, R., Calvez, S., Valentine, G. J., Burns, D., Dawson, M. D., Gundogdu, K., Hall, K. C., Boggess, T. F., Jouhti, T. & Pessa, M., 1 Aug 2004, In : Journal of Applied Physics. 96, 3, p. 1418-1424 6 p.

Research output: Contribution to journalArticle

Bragg reflectors
photoluminescence
optical properties
annealing
laser mode locking
14 Citations (Scopus)

Fabrication of matrix-addressable micro-LED arrays based on a novel etch technique

Choi, H. W., Jeon, C. W. & Dawson, M. D., 4 Jun 2004, In : Journal of Crystal Growth. 268, 3-4, p. 527-530 3 p.

Research output: Contribution to journalArticle

Light emitting diodes
Etching
light emitting diodes
Fabrication
fabrication
31 Citations (Scopus)

GaInNAs/GaAs Bragg-mirror-based structures for novel 1.3um device applications

Calvez, S., Hopkins, J. M., Smith, S. A., Clark, A. H., Macaluso, R., Sun, H. D., Dawson, M. D., Jouhti, T., Pessa, M., Gundogdu, K., Hall, K. C. & Boggess, T. F., 1 Aug 2004, In : Journal of Crystal Growth. 268, 3-4, p. 457-465 9 p.

Research output: Contribution to journalArticle

Surface emitting lasers
optical pumping
Bragg reflectors
solid state lasers
Mirrors
104 Citations (Scopus)

GaN micro-light-emitting diode arrays with monolithically integrated sapphire microlenses

Choi, H. W., Liu, C., Gu, E., McConnell, G., Girkin, J. M., Watson, I. M. & Dawson, M. D., 2004, In : Applied Physics Letters. 84, 13, p. 2253-2255 2 p.

Research output: Contribution to journalArticle

sapphire
light emitting diodes
emitters
plasma etching
cones
53 Citations (Scopus)

High density matrix-addressable AllnGaN-based 368-nm microarray light-emitting diodes

Jeon, C. W., Choi, H. W., Gu, E. & Dawson, M. D., 18 Oct 2004, In : IEEE Photonics Technology Letters. 16, 11, p. 2421-2423 2 p.

Research output: Contribution to journalArticle

Microarrays
Light emitting diodes
light emitting diodes
Fabrication
ultraviolet radiation