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Research Output 1998 2019

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Article
2004
83 Citations (Scopus)

High extraction efficiency InGaN micro-ring light emitting diodes

Choi, H. W., Dawson, M. D., Edwards, P. R. & Martin, R. W., 11 Mar 2004, In : Applied Physics Letters. 83, 22, p. 4483-4485 2 p.

Research output: Contribution to journalArticle

Open Access
File
light emitting diodes
rings
light emission
electron beams
output
46 Citations (Scopus)

High resolution 128x96 nitride microdisplay

Choi, H. W., Jeon, C. W. & Dawson, M. D., 4 May 2004, In : IEEE Electron Device Letters . 25, 5, p. 277-279 2 p.

Research output: Contribution to journalArticle

Nitrides
Luminance
Pixels
Display devices
Light emitting diodes
17 Citations (Scopus)

InGaN microring light-emitting diodes

Choi, H. W., Jeon, C. W. & Dawson, M. D., Jan 2004, In : IEEE Photonics Technology Letters. 16, 1, p. 33-35 2 p.

Research output: Contribution to journalArticle

Light emitting diodes
light emitting diodes
Fabrication
sinking
Geometry

Investigations of 1.55µm GaInNAs/GaAs heterostructures by optical spectroscopy

Sun, H. D., Clark, A. H., Calvez, S., Dawson, M. D., Liu, H. Y., Hopkinson, M., Navaretti, P., Ng, J. S., David, J. P. R., Gilet, P., Grenouillet, L. & Million, A., 2004, In : IEE Proceedings Optoelectronics. 151, 5, p. 331-334 4 p.

Research output: Contribution to journalArticle

Heterojunctions
spectroscopy
nitrides
molecular beam epitaxy
quantum dots
27 Citations (Scopus)

Long-wavelength monolithic GaInNAs vertical-cavity optical amplifiers

Clark, A. H., Calvez, S., Laurand, N., Macaluso, R., Sun, H. D., Dawson, M. D., Jouhti, T., Kontinnen, J. & Pessa, M., Jul 2004, In : IEEE Journal of Quantum Electronics. 40, 7, p. 878 -883

Research output: Contribution to journalArticle

Light amplifiers
Semiconductor optical amplifiers
light amplifiers
chips
Pumps
47 Citations (Scopus)

Micromachining and dicing of sapphire, gallium nitride and micro LED devices with UV copper vapour laser

Gu, E., Jeon, C. W., Choi, H. W., Rice, G. B., Dawson, M. D., Illy, E. K. & Knowles, M. R. H., 8 Mar 2004, In : Thin Solid Films. 453, 1, p. 462-466 4 p.

Research output: Contribution to journalArticle

Gallium nitride
Aluminum Oxide
gallium nitrides
Micromachining
micromachining
26 Citations (Scopus)

Optical characteristics of 1.55µm GaInNAs multiple quantum wells

Sun, H. D., Clark, A. H., Liu, H. Y., Hopkinson, M., Calvez, S. & Dawson, M. D., 1 Nov 2004, In : Applied Physics Letters. 85, 18, p. 4013-4015 2 p.

Research output: Contribution to journalArticle

quantum wells
spacers
light emission
photoluminescence
spectroscopy
56 Citations (Scopus)

Reflection/transmission confocal microscopy characterization of single-crystal diamond microlens arrays

Gu, E., Choi, H. W., Liu, C., Griffin, C., Girkin, J. M., Watson, I. M., Dawson, M. D., McConnell, G. & Gurney, A. M., 2004, In : Applied Physics Letters. 84, 15, p. 2754-2756 2 p.

Research output: Contribution to journalArticle

diamonds
microscopy
single crystals
profiles
photoresists
3 Citations (Scopus)

Sub-micron inGaN ring structures for high-efficiency LEDs

Choi, H. W., Edwards, P. R., Liu, C., Jeon, C. W., Martin, R. W., Watson, I. M., Dawson, M. D., Tripathy, P. & Chua, S. J., 2004, In : Physica Status Solidi C. 1, 2, p. 202-205 3 p.

Research output: Contribution to journalArticle

ring structures
light emitting diodes
Fresnel diffraction
cathodoluminescence
blue shift
1 Citation (Scopus)

Use of confocal and multiphoton microscopy for the evaluation of micro-optical components and emitters

Girkin, J. M., Gu, E., Griffin, C., Choi, H. W., Dawson, M. D. & McConnell, G., 2004, In : Microscopy Research and Technique. 64, 4, p. 293-296 3 p.

Research output: Contribution to journalArticle

Open Access
File
Optical Devices
Confocal microscopy
Confocal Microscopy
Light emitting diodes
Microscopic examination
2003
124 Citations (Scopus)

0.5-W single transverse-mode operation of an 850-nm diode-pumped surface-emitting semiconductor laser

Hastie, J. E., Hopkins, J. M., Calvez, S., Jeon, C. W., Burns, D., Abram, R. H., Riis, E., Ferguson, A. I. & Dawson, M. D., 2003, In : IEEE Photonics Technology Letters. 15, 7, p. 894-896 2 p.

Research output: Contribution to journalArticle

surface emitting lasers
Silicon carbide
Semiconductor lasers
Diodes
semiconductor lasers
35 Citations (Scopus)

1.3um GaInNAs optically-pumped vertical cavity semiconductor optical amplifier

Calvez, S., Clark, A. H., Hopkins, J. M., Macaluso, R., Merlin, P., Sun, H. D., Dawson, M. D., Jouhti, T. & Pessa, M., 2003, In : Electronics Letters. 39, 1, p. 100-102 2 p.

Research output: Contribution to journalArticle

Semiconductor optical amplifiers
Optical pumping
Optical fiber coupling
Amplification
Bandwidth
8 Citations (Scopus)

A novel fabrication method for a 64x64 matrix-addressable GaN-based micro-LED array

Jeon, C. W., Choi, H. W. & Dawson, M. D., 29 Sep 2003, In : Physica Status Solidi A. 200, 1, p. 79-82 3 p.

Research output: Contribution to journalArticle

Light emitting diodes
light emitting diodes
Fabrication
fabrication
Dry etching
23 Citations (Scopus)

Characterization of selective quantum well intermixing in 1.3um GaInNAs/GaAs structures

Sun, H. D., Macaluso, R., Dawson, M. D., Robert, F., Bryce, A. C., Marsh, J. H. & Riechert, H., Aug 2003, In : Journal of Applied Physics. 94, 3, p. 1550-1556 6 p.

Research output: Contribution to journalArticle

quantum wells
annealing
shift
caps
point defects
47 Citations (Scopus)

Fabrication and performance of parallel-addressed InGaN micro-LED arrays

Choi, H. W., Jeon, C. W., Dawson, M. D., Edwards, P. R. & Martin, R. W., Apr 2003, In : IEEE Photonics Technology Letters. 15, 4, p. 510-512 2 p.

Research output: Contribution to journalArticle

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

Fabrication of matrix-addressable InGaN-based microdisplays of high array density

Jeon, C. W., Choi, H. W. & Dawson, M. D., Nov 2003, In : IEEE Photonics Technology Letters. 15, 11, p. 1516-1518 2 p.

Research output: Contribution to journalArticle

Chemical mechanical polishing
Metallizing
Light emitting diodes
Diodes
Pixels
4 Citations (Scopus)

InGaN light-emitting diodes of micro-ring geometry

Choi, H. W., Jeon, C. W. & Dawson, M. D., Oct 2003, In : Physica Status Solidi C. 0, 7, p. 2185-2188 3 p.

Research output: Contribution to journalArticle

light emitting diodes
rings
geometry
sinking
high current
2 Citations (Scopus)

Low resistivity contacts to p-type GaN by plasma treatment

Choi, H. W., Jeon, C. W. & Dawson, M. D., Oct 2003, In : Physica Status Solidi C. 0, 7, p. 2210-2213 3 p.

Research output: Contribution to journalArticle

electric contacts
electrical resistivity
shift
electric potential
contact resistance
73 Citations (Scopus)

Mechanism of enhanced light output in InGaN-based microlight emitting diodes

Choi, H. W., Jeon, C. W., Dawson, M. D., Edwards, P. R., Tripathy, S. & Martin, R. W., May 2003, In : Journal of Applied Physics. 93, 10, p. 5978-5982 4 p.

Research output: Contribution to journalArticle

Open Access
File
diodes
whispering gallery modes
output
cavity resonators
acceleration (physics)
52 Citations (Scopus)

Microchip vertical external cavity surface emitting lasers

Hastie, J. E., Hopkins, J. M., Jeon, C. W., Calvez, S., Burns, D., Dawson, M. D., Abram, R. H., Riis, E., Ferguson, A. I., Alford, W. J., Raymond, T. D. & Allerman, A. A., 2003, In : Electronics Letters. 39, 18, p. 1324-1326 2 p.

Research output: Contribution to journalArticle

Surface emitting lasers
Laser modes

Microchip vertical external cavity surface-emitting lasers

Hastie, J. E., Hopkins, J. M., Jeon, C. W., Calvez, S., Burns, D., Dawson, M. D., Abram, R. H., Riis, E., IEEE & IEEE, 27 Oct 2003, In : IEEE Lasers and Electro-Optics Society Annual Meeting. 2, p. 507-508 1 p.

Research output: Contribution to journalArticle

Surface emitting lasers
Mirrors
Spreaders
Light sources
Pumps
5 Citations (Scopus)

Micromachining of gallium nitride, sapphire and silicon carbide using ultra-short pulses

Rice, G. B., Jones, D. R., Kim, K. S., Girkin, J. M., Jarozynski, D. & Dawson, M. D., 2003, In : Proceedings of SPIE the International Society for Optical Engineering. 5147, p. 299-307 9 p.

Research output: Contribution to journalArticle

Ultrashort Pulse
Gallium nitride
Micromachining
Nitrides
Aluminum Oxide
1 Citation (Scopus)

Microreflectivity studies of wavelength control in oxidised AlGaAs microcavities

Macaluso, R., Robert, F., Bryce, A. C., Calvez, S. & Dawson, M. D., 8 Feb 2003, In : Materials Science and Engineering B. 102, 1, p. 317-322 5 p.

Research output: Contribution to journalArticle

Microcavities
aluminum gallium arsenides
Wavelength
Oxidation
oxidation
31 Citations (Scopus)

Optical transitions in GaInNAs/GaAs multi-quantum wells with varying N content investigated by photoluminescence excitation spectroscopy

Sun, H. D., Dawson, M. D., Othman, M., Yong, J. C. L., Rorison, J. M., Gilet, P., Grenouillet, L. & Million, A., Jan 2003, In : Applied Physics Letters. 82, 3, p. 376-378 2 p.

Research output: Contribution to journalArticle

optical transition
quantum wells
photoluminescence
nitrogen
spectroscopy
20 Citations (Scopus)

Quantum well intermixing in GaInNAs/GaAs structures

Sun, H. D., Macaluso, R., Calvez, S., Dawson, M. D., Robert, F., Bryce, A. C., Marsh, J. H., Gilet, P., Grenouillet, L., Million, A., Nam, K. B., Lin, J. Y. & Jiang, H. X., Dec 2003, In : Journal of Applied Physics. 94, 12, p. 7581-7585 4 p.

Research output: Contribution to journalArticle

quantum wells
caps
sputtering
disorders
saturation

Resonant wavelength control of a 1.3um microcavity by intracavity steam oxidation

Macaluso, R., Robert, F., Bryce, A. C., Calvez, S. & Dawson, M. D., Feb 2003, In : Semiconductor Science and Technology. 18, 2, p. L12-L15

Research output: Contribution to journalArticle

Microcavities
Steam
steam
Wavelength
Oxidation
10 Citations (Scopus)

Selective modification of band gap in GaInNAs/GaAs structures by quantum-well intermixing

Macaluso, R., Sun, H. D., Dawson, M. D., Robert, F., Bryce, A. C., Marsh, J. H. & Riechert, H., 16 Jun 2003, In : Applied Physics Letters. 82, 24, p. 4259-4261 3 p.

Research output: Contribution to journalArticle

quantum wells
photoluminescence
shift
caps
secondary ion mass spectrometry
15 Citations (Scopus)

Simulation of gain and modulation bandwidths of 1300nm RWG InGaAsN lasers

Yong, J. C. L., Rorison, J. M., Othman, M., Sun, H. D., Dawson, M. D. & Williams, K. A., Feb 2003, In : IEE Proceedings Optoelectronics. 150, 1, p. 80-82 2 p.

Research output: Contribution to journalArticle

Ridge waveguides
Quantum well lasers
waveguide lasers
Semiconductor quantum wells
Gages
2002
26 Citations (Scopus)

Fabrication of two-dimensional InGaN-based micro-LED arrays

Jeon, C. W., Kim, K. S. & Dawson, M. D., Jul 2002, In : Physica Status Solidi A. 192, 2, p. 325-328 3 p.

Research output: Contribution to journalArticle

Chemical mechanical polishing
Electroluminescence
Plasma enhanced chemical vapor deposition
Light emitting diodes
Diodes
8 Citations (Scopus)

GaN microcavities formed by laser lift-off and plasma etching

Martin, R., Kim, H. S., Cho, Y., Edwards, P. R., Watson, I. M., Sands, T., Cheung, N. W. & Dawson, M. D., 30 May 2002, In : Materials Science and Engineering B. 93, 1-3, p. 98-101 3 p.

Research output: Contribution to journalArticle

Microcavities
Plasma etching
plasma etching
Aluminum Oxide
etching

Introduction to the issue on optoelectronic materials and processing

Choquette, K. D., Dawson, M. D. & Koyama, F., Jul 2002, In : IEEE Journal of Selected Topics in Quantum Electronics. 8, 4, p. 737-738 1 p.

Research output: Contribution to journalArticle

70 Citations (Scopus)

Low-loss 1.3um GaInNAs saturable bragg reflector for high-power picosecond neodymium lasers

Sun, H. D., Valentine, G. J., Macaluso, R., Calvez, S., Burns, D., Dawson, M. D., Jouhti, T. & Pessa, M., 2002, In : Optics Letters. 27, 23, p. 2124-2126 2 p.

Research output: Contribution to journalArticle

neodymium lasers
Bragg reflectors
locking
pulse duration
diodes
41 Citations (Scopus)

Optical investigations of GaInNAs/GaAs multi-quantum wells with low nitrogen content

Sun, H. D., Hetterich, M., Dawson, M. D., Egorov, A. Y., Bernklau, D. & Riechert, H., Aug 2002, In : Journal of Applied Physics. 92, 3, p. 1380-1385 5 p.

Research output: Contribution to journalArticle

quantum wells
photoluminescence
nitrogen
excitation
temperature dependence
30 Citations (Scopus)

Optimization of an optically pumped 1.3um GaInNAs vertical-cavity surface-emitting laser

Calvez, S., Burns, D. & Dawson, M. D., 2002, In : IEEE Photonics Technology Letters. 14, 2, p. 131-133 2 p.

Research output: Contribution to journalArticle

Surface emitting lasers
surface emitting lasers
Numerical models
Mirrors
pumping
14 Citations (Scopus)

Surface properties of GaN fabricated by laser lift-off and ICP etching

Kim, H-S., Dawson, M. D. & Yeom, G-Y., Apr 2002, In : New Physics: Korean Physical Society. 40, 4, p. 567-571 4 p.

Research output: Contribution to journalArticle

surface properties
etching
plasma etching
lasers
surface roughness
2001
5 Citations (Scopus)

Buried dielectric mirrors for the lateral overgrowth of GaN-based microcavities

Martin, R. W., Edwards, P. R., Pecharroman-Gallego, R., Trager-Cowan, C., Kim, T., Kim, H. S., Kim, K. S., Watson, I. M. & Dawson, M. D., Jan 2001, In : Physica Status Solidi A. 183, 1, p. 145-149 4 p.

Research output: Contribution to journalArticle

Microcavities
Multilayers
mirrors
reflectance
Cathodoluminescence
8 Citations (Scopus)

Characterisation of optical properties in micro-patterned InGaN quantum wells

Kim, K. S., Edwards, P. R., Kim, H. S., Martin, R. W., Watson, I. M. & Dawson, M. D., Nov 2001, In : Physica Status Solidi B. 228, 1, p. 169-172 3 p.

Research output: Contribution to journalArticle

Semiconductor quantum wells
Optical properties
quantum wells
Whispering gallery modes
optical properties
9 Citations (Scopus)

Etch end-point detection of GaN-based devices using optical emission spectroscopy

Kim, H. S., Sung, Y. J., Kim, D. W., Kim, T., Dawson, M. D. & Yeom, G. Y., 22 May 2001, In : Materials Science and Engineering B. 82, 1-3, p. 159-162 4 p.

Research output: Contribution to journalArticle

Optical emission spectroscopy
optical emission spectroscopy
Etching
etching
products
32 Citations (Scopus)

Femtosecond laser machining of gallium nitride

Kim, T., Kim, H. S., Hetterich, M., Jones, D., Girkin, J. M., Bente, E. & Dawson, M. D., 22 May 2001, In : Materials Science and Engineering B. 82, 1-3, p. 262-264 3 p.

Research output: Contribution to journalArticle

Gallium nitride
laser machining
gallium nitrides
Ultrashort pulses
Machining
3 Citations (Scopus)

InGaN/GaN quantum well microcavities formed by laser lift-off and plasma etching

Edwards, P. R., Martin, R. W., Kim, H. S., Kim, K. S., Chen, Y., Watson, I. M., Sands, T., Cheung, N. W. & Dawson, M. D., Nov 2001, In : Physica Status Solidi B. 228, 1, p. 91-94 3 p.

Research output: Contribution to journalArticle

Microcavities
Plasma etching
plasma etching
Semiconductor quantum wells
Photoluminescence
11 Citations (Scopus)

In situ and ex situ evaluation of mechanisms of lateral epitaxial overgrowth

Watson, I. M., Liu, C., Kim, K. S., Kim, H. S., Deatcher, C. J., Girkin, J. M., Dawson, M. D., Edwards, P. R., Trager-Cowan, C. & Martin, R. W., Nov 2001, In : Physica Status Solidi A. 188, 2, p. 743-746 3 p.

Research output: Contribution to journalArticle

Coalescence
Masks
flat surfaces
Organic Chemicals
coalescing
29 Citations (Scopus)

Optical spectroscopy of GaN microcavities with thicknesses controlled using a plasma etch-back

Martin, R. W., Edwards, P. R., Kim, H. S., Kim, K. S., Kim, T., Watson, I. M., Dawson, M. D., Cho, Y., Sands, T. & Cheung, N. W., 5 Nov 2001, In : Applied Physics Letters. 79, 19, 3 p., 3029.

Research output: Contribution to journalArticle

Open Access
File
cavities
spectroscopy
photoluminescence
Bragg reflectors
sapphire
9 Citations (Scopus)

Patterned dielectric mirrors for lateral overgrowth of GaN-based lasers

Kim, T., Martin, R. W., Watson, I. M., Dawson, M. D., Krauss, T. F., Marsh, J. H. & De La Rue, R. M., 22 May 2001, In : Materials Science and Engineering B. 82, 1-3, p. 245-247 2 p.

Research output: Contribution to journalArticle

Multilayers
mirrors
Lasers
lasers
Aluminum Oxide
1999
9 Citations (Scopus)

Synchronously pumped optical parametric oscillation in periodically poled lithium niobate with 1-W average output power

Graf, T., McConnell, G., Ferguson, A. I., Bente, E., Burns, D. & Dawson, M. D., May 1999, In : Applied Optics. 38, 15, p. 3324-3328 4 p.

Research output: Contribution to journalArticle

lithium niobates
mathematical models
polynomials
diffraction patterns
oscillations