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Research Output 1998 2019

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Article
2004
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
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
35 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
2006
31 Citations (Scopus)

4W single transverse-mode VECSEL utilising intra-cavity diamond heat spreader

Harkonen, A., Suomalainen, S., Saarinen, E., Orsila, L., Koskinen, R., Okhotnikov, O., Calvez, S. & Dawson, M. D., 8 Jun 2006, In : Electronics Letters. 42, 12, p. 693-694 1 p.

Research output: Contribution to journalArticle

Spreaders
Diamonds
Beam quality
Lasers
Surface emitting lasers
14 Citations (Scopus)

C-band emission from GaInNAsSbVCSEL on GaAS

Laurand, N., Calvez, S., Sun, H. D., Dawson, M. D., Gupta, J. A. & Aers, G. C., 2006, In : Electronics Letters. 42, 1, p. 29-30 1 p.

Research output: Contribution to journalArticle

Mirrors
Surface emitting lasers
Molecular beam epitaxy
Annealing
Wavelength

Characterization of MOVPE-grown GaInNAs quantum well with multi-barriers by Z-contrast imaging and SIMS

Kim, K. S., Kim, T., Park, Y. J., Baek, S. I., Kim, Y. W., Sun, H. D. & Dawson, M. D., 2006, In : Journal of Crystal Growth. 287, 2, p. 620-624 4 p.

Research output: Contribution to journalArticle

Metallorganic vapor phase epitaxy
Secondary ion mass spectrometry
Semiconductor quantum wells
secondary ion mass spectrometry
quantum wells
35 Citations (Scopus)

Fabrication and characterization of diamond micro-optics

Lee, C. L., Choi, H. W., Gu, E., Dawson, M. D. & Murphy, H., 2006, In : Diamond and Related Materials. 15, 4-8, p. 725-728 3 p.

Research output: Contribution to journalArticle

Microoptics
Diamond
Diamonds
diamonds
optics
9 Citations (Scopus)

High-power vertical external-cavity surface-emitting lasers

Hopkins, J. M., Calvez, S., Kemp, A., Hastie, J. E., Smith, S. A., MacLean, A. J., Burns, D. & Dawson, M. D., 21 Feb 2006, In : Physica Status Solidi C. 3, 3, p. 380-385 5 p.

Research output: Contribution to journalArticle

surface emitting lasers
cavities
wavelengths
photographic developers
versatility
110 Citations (Scopus)

Hybrid inorganic/organic semiconductor heterostructures with efficient non-radiative energy transfer

Heliotis, G., Itskos, G., Murray, R., Dawson, M. D., Watson, I. M. & Bradley, D. D. C., 2006, In : Advanced Materials. 18, 3, p. 334-338 4 p.

Research output: Contribution to journalArticle

Semiconducting organic compounds
Polymer films
Energy transfer
Semiconductor quantum wells
Heterojunctions

InGaN multiple-quantum-well epifilms on GaN-silicon substrates for microcavities and surface-emitting lasers

Lee, J. K., Cho, H., Kim, B. H., Park, S. H., Gu, E., Watson, I. M. & Dawson, M. D., Jul 2006, In : New Physics: Korean Physical Society. 49, 1, p. 407-411 4 p.

Research output: Contribution to journalArticle

surface emitting lasers
quantum wells
membranes
silicon
etching
39 Citations (Scopus)

Intracavity diamond heatspreaders in lasers: the effects of birefringence

van Loon, F., Kemp, A. J., MacLean, A., Calvez, S., Hopkins, J-M., Hastie, J. E., Dawson, M. D. & Burns, D., 2 Oct 2006, In : Optics Express. 14, 20, p. 9250-9260 10 p.

Research output: Contribution to journalArticle

birefringence
diamonds
platelets
lasers
laser cavities
99 Citations (Scopus)

Lomeguatrib, a potent inhibitor of o-6-alkylguanine-DNA-alkyltrasnferase: phase i safety, pharmacodynamic, and pharmacokinetic trial and evaluation in combination with temozolomide in patients with advanced solid tumours

Ranson, M., Middleton, M. R., Bridgewater, J., Lee, S. M., Dawson, M., Jowle, D., Halbert, G. W., Waller, S., McGrath, H., Gumbrell, L., McElhinney, R. S., Donnelly, D., McMurry, T. B. H. & Margison, G. P., 2006, In : Clinical Cancer Research. 12, 5, p. 1577-1584 8 p.

Research output: Contribution to journalArticle

temozolomide
Pharmacokinetics
Safety
DNA
Alkyl and Aryl Transferases
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

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