Dr David Childs

  • Lecturer (Electronic and Nanoscale Engineering)

telephone: 0141 330 8604
email: David.Childs@glasgow.ac.uk

Research interests

Biography

David Childs received the B.Sc. degree in Physics, the. M.Sc. degree in Semiconductor Science and Technology from Imperial College, London in 1996 and 1997 respectively.  He continued at Imperial where he received his PhD in Properties and applications of 1.3um InAs/GaAs Quantum Dot Devices in 2002.  He was then with the R&D Department of Marconi Optical Components (latter Bookham, now Oclaro) at the Caswell semiconductor research and fabrication facility until 2006, where he was responsible for the development of a range of telecoms lasers.  During this time he also worked on several European projects developing Quantum Dot technology.  Following this he joined the department of Electronic and Electrical Engineering at the University of Sheffield.  There he was engaged in a number of projects developing semiconductor light sources from visible through to THz wavelengths.  He was also involved in developing systems to demonstrate the application of semiconductor devices to fields ranging from selective laser melting (3D printing), to mid-infrared hyper-spectral imaging (biomedical imaging).  Since 2015 he is a lecturer in the Electronic and Nanoscale Engineering group within the School of Engineering at the University of Glasgow. 

Research Interests

  • Optoelectronic device engineering
  • Semiconductor quantum dots
  • Telecommunications lasers
  • Superluminescent diodes
  • Surface emitting lasers
  • Biophotonics applications of semiconductor light sources

 

 

Selected publications

Teaching

Electronic Engineering 1Y

Microelectronic Systems 1

All publications

List by: Type | Date

Jump to: 2017 | 2016 | 2015 | 2005 | 2004 | 2001 | 2000 | 1999 | 1998
Number of items: 33.

2017

Zavala-Arredondo, M., Boone, N., Willmott, J., Childs, D. T.D., Ivanov, P., Groom, K. M., and Mumtaz, K. (2017) Laser diode area melting for high speed additive manufacturing of metallic components. Materials and Design, 117, pp. 305-315. (doi:10.1016/j.matdes.2016.12.095)

2016

Goldberg, G. R., Ivanov, P., Ozaki, N., Childs, D. T.D., Groom, K. M., Kennedy, K. L., and Hogg, R. A. (2016) Gallium Nitride Super-Luminescent Light Emitting Diodes for Optical Coherence Tomography Applications. In: 2016 International Semiconductor Laser Conference (ISLC), Kobe, Japan, 12-15 Sep 2016, ISBN 9784885523069

Peyvast, N., Zhou, K., Hogg, R. A., and Childs, D. T.D. (2016) Dominant Role of Many-Body Effects on the Carrier Distribution Function of Quantum Dot Lasers. In: 2016 International Semiconductor Laser Conference (ISLC), Kobe, Japan, 12-15 Sep 2016, ISBN 9784885523069

Roberts, T. S. et al. (2016) Strain Balancing of MOVPE InAs/GaAs Quantum Dots Using GaAs0.8P0.2. In: 2016 International Semiconductor Laser Conference (ISLC), Kobe, Japan, 12-15 Sep 2016, ISBN 9784885523069

Taylor, R.J.E., Li, G., Ivanov, P., Childs, D.T.D., Stevens, B.J., Harrison, B., Babazadeh, N., Ignatova, O., and Hogg, R.A. (2016) Mode Control in Photonic Crystal Surface Emitting Lasers Through In-Plane Feedback. In: 2016 International Semiconductor Laser Conference (ISLC), Kobe, Japan, 12-15 Sep 2016, ISBN 9784885523069

Lei, H., Stevens, B.J., Fry, P.W., Babazadeh, N., Ternent, G., Childs, D., and Groom, K.M. (2016) A GaAs-based self-aligned stripe distributed feedback laser. Semiconductor Science and Technology, 34(8), 085001. (doi:10.1088/0268-1242/31/8/085001)

Ghazal, O. M. S., Lei, D., Childs, D. T., Stevens, B. J., Babazadeh, N., Hogg, R.A., and Groom, K. M. (2016) GaAs-based Self-Aligned Stripe Superluminescent Diodes Processed Normal to the Cleaved Facet. In: Novel In-Plane Semiconductor Lasers XV, San Francisco, CA, USA, 15-18 Feb 2016, p. 976706. (doi:10.1117/12.2211062)

Tooley, I.G., Childs, D.T.D., Stevens, B.J., Groom, K.M., and Hogg, R.A. (2016) Simulation of Broad Spectral Bandwidth Emitters at 1060 nm for Optical Coherence Tomography. In: Novel In-Plane Semiconductor Lasers XV, San Francisco, CA, USA, 15-18 Feb 2016, 97671W. (doi:10.1117/12.2211657)

Sobhani, S.A., Childs, D.T., Babazadeh, N., Stevens, B.J., Nishi, K., Sugawara, M., Takemasa, K., and Hogg, R.A. (2016) Study of electro-absorption effects in 1300nm In(Ga)As/GaAs quantum dot materials. In: Physics and Simulation of Optoelectronic Devices XXIV, San Francisco, California, USA, 15-18 Feb 2016, 97420S1. ISBN 9781628419771 (doi:10.1117/12.2213187)

Peyvast, N., Zhou, K., Hogg, R. A., and Childs, D. (2016) Dominant role of many-body effects on the carrier distribution function of quantum dot lasers. Applied Physics Express, 9(3), 032705. (doi:10.7567/APEX.9.032705)

Ozaki, N. et al. (2016) Superluminescent diode with a broadband gain based on self-assembled InAs quantum dots and segmented contacts for an optical coherence tomography light source. Journal of Applied Physics, 119(8), 083107. (doi:10.1063/1.4942640)

Ivanov, P., Taylor, R. J.E., Li, G., Childs, D. T.D., Khamas, S., Sarma, J., Erdelyi, R., and Hogg, R. A. (2016) Three-Dimensional Finite-Difference Time-Domain Modelling of Photonic Crystal Surface-Emitting Lasers. In: Novel In-Plane Semiconductor Lasers XV, San Francisco, CA, USA, 15-18 Feb 2016, p. 976721. (doi:10.1117/12.2213060)

Taylor, R.J.E., Li, G., Ivanov, P., Childs, D.D., Stevens, B.J., Babazadeh, N., Ignatova, O., Nakano, Y., Tanemura, T., and Hogg, R.A. (2016) Photonic Crystal Surface Emitting Lasers — Coherent Arrays and External Feedback. In: 2016 International Conference Laser Optics, St. Petersburg, Russia, 27 Jun - 01 Jul 2016, R3. ISBN 9781467397384 (doi:10.1109/LO.2016.7549733)

2015

Guan, G., Hirsch, M., Lu, Z. H., Childs, D. T.D., Matcher, S. J., Goodridge, R., Groom, K. M., and Clare, A. T. (2015) Evaluation of selective laser sintering processes by optical coherence tomography. Materials and Design, 88, pp. 837-846. (doi:10.1016/j.matdes.2015.09.084)

Childs, D. T. D., Hogg, R. A., Revin, D. G., Rehman, I. U., Cockburn, J. W., and Matcher, S. J. (2015) Sensitivity advantage of QCL tunable-laser mid-infrared spectroscopy over FTIR spectroscopy. Applied Spectroscopy Reviews, 50(10), pp. 822-839. (doi:10.1080/05704928.2015.1075208)

Chen, S. et al. (2015) GaAs-based superluminescent light-emitting diodes with 290-nm emission bandwidth by using hybrid quantum well/quantum dot structures. Nanoscale Research Letters, 10(1), 340. (doi:10.1186/s11671-015-1049-2) (PMID:26303141) (PMCID:PMC4547973)

2005

Liu, H.Y., Childs, D.T., Badcock, T.J., Groom, K.M., Sellers, I.R., Hopkinson, M., Hogg, R.A., Robbins, D.J., Mowbray, D.J., and Skolnick, M.S. (2005) High-performance three-layer 1.3-/spl mu/m InAs-GaAs quantum-dot lasers with very low continuous-wave room-temperature threshold currents. IEEE Photonics Technology Letters, 17(6), pp. 1139-1141. (doi:10.1109/LPT.2005.846948)

Sellers, I. R. et al. (2005) Growth and Characterization of 1.3μm Multi-Layer Quantum Dots Lasers Incorporating High Growth Temperature Spacer Layers. 27th International Conference on the Physics of Semiconductors - ICPS-27, Flagstaff, AZ, USA, 26-30 Jul 2004. pp. 1547-1548. ISBN 0735402574 (doi:10.1063/1.1994706)

2004

Ward, A.J., Robbins, D.J., Reid, D.C.J., Whitbread, N.D., Busico, G., Williams, P.J., Duck, J.P., Childs, D., and Carter, A.C. (2004) Realization of phase grating comb reflectors and their application to widely tunable DBR lasers. IEEE Photonics Technology Letters, 16(11), pp. 2427-2429. (doi:10.1109/LPT.2004.834887)

Sellers, I.R., Liu, H.Y., Groom, K.M., Childs, D.T., Robbins, D., Badcock, T.J., Hopkinson, M., Mowbray, D.J., and Skolnick, M.S. (2004) 1.3 µm InAs∕GaAs multilayer quantum-dot laser with extremely low room-temperature threshold current density. Electronics Letters, 40(22), p. 1412. (doi:10.1049/el:20046692)

2001

Joyce, P.B., Krzyzewski, T..J., Bell, G.R., Jones, T.S., Malik, S., Childs, D., and Murray, R. (2001) Growth rate effects on the size, composition and optical properties of InAs/GaAs quantum dots grown by molecular beam epitaxy. Journal of Crystal Growth, 227-22, pp. 1000-1004. (doi:10.1016/S0022-0248(01)00967-8)

Malik, S., Le Ru, E.C., Childs, D., and Murray, R. (2001) Time-resolved studies of annealed InAs/GaAs self-assembled quantum dots. Physical Review B, 63, 155313. (doi:10.1103/PhysRevB.63.155313)

Childs, D., Malik, S., Le Ru, E.C., Tjerlund, L., and Murray, R. (2001) Tuning InAs/GaAs self-assembled quantum dots to investigate relaxation processes. MRS Proceedings, 642, J3.36.1.

Le Ru, E.C., Malik, S., Childs, D., and Murray, R. (2001) Prediction of the properties of annealed InAs/GaAs quantum dot samples assuming conservation of Indium atoms. MRS Proceedings, 642, J3.27.1.

Malik, S., Le Ru, E.C., Childs, D., and Murray, R. (2001) Radiative decay and carrier relaxation in annealed InAs/GaAs self-assembled quantum dots. MRS Proceedings, 642, J5.8.1.

2000

Joyce, P. B., Krzyzewski, T. J., Bell, G. R., Jones, T. S., Malik, S., Childs, D., and Murray, R. (2000) Effect of growth rate on the size, composition, and optical properties of InAs/GaAs quantum dots grown by molecular-beam epitaxy. Physical Review B, 62(16), pp. 10891-10895. (doi:10.1103/PhysRevB.62.10891)

1999

Gray, J.W., Childs, D., Malik, S., Siverns, P., Roberts, C., Stavrinou, P.N., Whitehead, M., Murray, R., and Parry, G. (1999) Quantum dot resonant cavity light emitting diode operating near 1300 nm. Electronics Letters, 35(3), pp. 242-243. (doi:10.1049/el:19990114)

Murray, R., Childs, D., Malik, S., Siverns, P., Roberts, C., Hartmann, J.-M., and Stavrinou, P. (1999) 1.3 µm room temperature emission from InAs/GaAs self-assembled quantum dots. Japanese Journal of Applied Physics, 38(1B), pp. 528-530. (doi:10.1143/JJAP.38.528)

Murray, R., Malik, S., Siverns, P., Childs, D., Roberts, C., Joyce, B., and Davock, H. (1999) Scanning transmission electron microscopy (STEM) study of InAs/GaAs quantum dots. Japanese Journal of Applied Physics, 38(1B), pp. 496-499. (doi:10.1143/JJAP.38.496)

Childs, D., Malik, S., Siverns, P., Roberts, C., and Murray, R. (1999) 1.3 μm InAs/GaAs quantum dot led. MRS Proceedings, 571, (doi:10.1557/PROC-571-267)

Malik, S., Siverns, P., Childs, D., Roberts, C., Hartmann, J.-M., and Murray, R. (1999) Controlling growth of InAs/GaAs self-assembled quantum dots to give 1.3 μm room temperature emission. MRS Proceedings, 571, (doi:10.1557/PROC-571-273)

1998

Rowland, G.L., Hosea, T.J.C., Malik, S., Childs, D., and Murray, R. (1998) A photomodulated reflectance study of InAs/GaAs self-assembled quantum dots. Applied Physics Letters, 73(22), 3268. (doi:10.1063/1.122740)

Siverns, P.D., Malik, S., McPherson, G., Childs, D., Roberts, C., Murray, R., Joyce, B. A., and Davock, H. (1998) Scanning transmission-electron microscopy study of InAs/GaAs quantum dots. Physical Review B, 58(16), R10127-R10130. (doi:10.1103/PhysRevB.58.R10127)

This list was generated on Tue Mar 28 20:41:52 2017 BST.
Number of items: 33.

Articles

Zavala-Arredondo, M., Boone, N., Willmott, J., Childs, D. T.D., Ivanov, P., Groom, K. M., and Mumtaz, K. (2017) Laser diode area melting for high speed additive manufacturing of metallic components. Materials and Design, 117, pp. 305-315. (doi:10.1016/j.matdes.2016.12.095)

Lei, H., Stevens, B.J., Fry, P.W., Babazadeh, N., Ternent, G., Childs, D., and Groom, K.M. (2016) A GaAs-based self-aligned stripe distributed feedback laser. Semiconductor Science and Technology, 34(8), 085001. (doi:10.1088/0268-1242/31/8/085001)

Peyvast, N., Zhou, K., Hogg, R. A., and Childs, D. (2016) Dominant role of many-body effects on the carrier distribution function of quantum dot lasers. Applied Physics Express, 9(3), 032705. (doi:10.7567/APEX.9.032705)

Ozaki, N. et al. (2016) Superluminescent diode with a broadband gain based on self-assembled InAs quantum dots and segmented contacts for an optical coherence tomography light source. Journal of Applied Physics, 119(8), 083107. (doi:10.1063/1.4942640)

Guan, G., Hirsch, M., Lu, Z. H., Childs, D. T.D., Matcher, S. J., Goodridge, R., Groom, K. M., and Clare, A. T. (2015) Evaluation of selective laser sintering processes by optical coherence tomography. Materials and Design, 88, pp. 837-846. (doi:10.1016/j.matdes.2015.09.084)

Childs, D. T. D., Hogg, R. A., Revin, D. G., Rehman, I. U., Cockburn, J. W., and Matcher, S. J. (2015) Sensitivity advantage of QCL tunable-laser mid-infrared spectroscopy over FTIR spectroscopy. Applied Spectroscopy Reviews, 50(10), pp. 822-839. (doi:10.1080/05704928.2015.1075208)

Chen, S. et al. (2015) GaAs-based superluminescent light-emitting diodes with 290-nm emission bandwidth by using hybrid quantum well/quantum dot structures. Nanoscale Research Letters, 10(1), 340. (doi:10.1186/s11671-015-1049-2) (PMID:26303141) (PMCID:PMC4547973)

Liu, H.Y., Childs, D.T., Badcock, T.J., Groom, K.M., Sellers, I.R., Hopkinson, M., Hogg, R.A., Robbins, D.J., Mowbray, D.J., and Skolnick, M.S. (2005) High-performance three-layer 1.3-/spl mu/m InAs-GaAs quantum-dot lasers with very low continuous-wave room-temperature threshold currents. IEEE Photonics Technology Letters, 17(6), pp. 1139-1141. (doi:10.1109/LPT.2005.846948)

Ward, A.J., Robbins, D.J., Reid, D.C.J., Whitbread, N.D., Busico, G., Williams, P.J., Duck, J.P., Childs, D., and Carter, A.C. (2004) Realization of phase grating comb reflectors and their application to widely tunable DBR lasers. IEEE Photonics Technology Letters, 16(11), pp. 2427-2429. (doi:10.1109/LPT.2004.834887)

Sellers, I.R., Liu, H.Y., Groom, K.M., Childs, D.T., Robbins, D., Badcock, T.J., Hopkinson, M., Mowbray, D.J., and Skolnick, M.S. (2004) 1.3 µm InAs∕GaAs multilayer quantum-dot laser with extremely low room-temperature threshold current density. Electronics Letters, 40(22), p. 1412. (doi:10.1049/el:20046692)

Joyce, P.B., Krzyzewski, T..J., Bell, G.R., Jones, T.S., Malik, S., Childs, D., and Murray, R. (2001) Growth rate effects on the size, composition and optical properties of InAs/GaAs quantum dots grown by molecular beam epitaxy. Journal of Crystal Growth, 227-22, pp. 1000-1004. (doi:10.1016/S0022-0248(01)00967-8)

Malik, S., Le Ru, E.C., Childs, D., and Murray, R. (2001) Time-resolved studies of annealed InAs/GaAs self-assembled quantum dots. Physical Review B, 63, 155313. (doi:10.1103/PhysRevB.63.155313)

Childs, D., Malik, S., Le Ru, E.C., Tjerlund, L., and Murray, R. (2001) Tuning InAs/GaAs self-assembled quantum dots to investigate relaxation processes. MRS Proceedings, 642, J3.36.1.

Le Ru, E.C., Malik, S., Childs, D., and Murray, R. (2001) Prediction of the properties of annealed InAs/GaAs quantum dot samples assuming conservation of Indium atoms. MRS Proceedings, 642, J3.27.1.

Malik, S., Le Ru, E.C., Childs, D., and Murray, R. (2001) Radiative decay and carrier relaxation in annealed InAs/GaAs self-assembled quantum dots. MRS Proceedings, 642, J5.8.1.

Joyce, P. B., Krzyzewski, T. J., Bell, G. R., Jones, T. S., Malik, S., Childs, D., and Murray, R. (2000) Effect of growth rate on the size, composition, and optical properties of InAs/GaAs quantum dots grown by molecular-beam epitaxy. Physical Review B, 62(16), pp. 10891-10895. (doi:10.1103/PhysRevB.62.10891)

Gray, J.W., Childs, D., Malik, S., Siverns, P., Roberts, C., Stavrinou, P.N., Whitehead, M., Murray, R., and Parry, G. (1999) Quantum dot resonant cavity light emitting diode operating near 1300 nm. Electronics Letters, 35(3), pp. 242-243. (doi:10.1049/el:19990114)

Murray, R., Childs, D., Malik, S., Siverns, P., Roberts, C., Hartmann, J.-M., and Stavrinou, P. (1999) 1.3 µm room temperature emission from InAs/GaAs self-assembled quantum dots. Japanese Journal of Applied Physics, 38(1B), pp. 528-530. (doi:10.1143/JJAP.38.528)

Murray, R., Malik, S., Siverns, P., Childs, D., Roberts, C., Joyce, B., and Davock, H. (1999) Scanning transmission electron microscopy (STEM) study of InAs/GaAs quantum dots. Japanese Journal of Applied Physics, 38(1B), pp. 496-499. (doi:10.1143/JJAP.38.496)

Childs, D., Malik, S., Siverns, P., Roberts, C., and Murray, R. (1999) 1.3 μm InAs/GaAs quantum dot led. MRS Proceedings, 571, (doi:10.1557/PROC-571-267)

Malik, S., Siverns, P., Childs, D., Roberts, C., Hartmann, J.-M., and Murray, R. (1999) Controlling growth of InAs/GaAs self-assembled quantum dots to give 1.3 μm room temperature emission. MRS Proceedings, 571, (doi:10.1557/PROC-571-273)

Rowland, G.L., Hosea, T.J.C., Malik, S., Childs, D., and Murray, R. (1998) A photomodulated reflectance study of InAs/GaAs self-assembled quantum dots. Applied Physics Letters, 73(22), 3268. (doi:10.1063/1.122740)

Siverns, P.D., Malik, S., McPherson, G., Childs, D., Roberts, C., Murray, R., Joyce, B. A., and Davock, H. (1998) Scanning transmission-electron microscopy study of InAs/GaAs quantum dots. Physical Review B, 58(16), R10127-R10130. (doi:10.1103/PhysRevB.58.R10127)

Conference or Workshop Item

Sellers, I. R. et al. (2005) Growth and Characterization of 1.3μm Multi-Layer Quantum Dots Lasers Incorporating High Growth Temperature Spacer Layers. 27th International Conference on the Physics of Semiconductors - ICPS-27, Flagstaff, AZ, USA, 26-30 Jul 2004. pp. 1547-1548. ISBN 0735402574 (doi:10.1063/1.1994706)

Conference Proceedings

Goldberg, G. R., Ivanov, P., Ozaki, N., Childs, D. T.D., Groom, K. M., Kennedy, K. L., and Hogg, R. A. (2016) Gallium Nitride Super-Luminescent Light Emitting Diodes for Optical Coherence Tomography Applications. In: 2016 International Semiconductor Laser Conference (ISLC), Kobe, Japan, 12-15 Sep 2016, ISBN 9784885523069

Peyvast, N., Zhou, K., Hogg, R. A., and Childs, D. T.D. (2016) Dominant Role of Many-Body Effects on the Carrier Distribution Function of Quantum Dot Lasers. In: 2016 International Semiconductor Laser Conference (ISLC), Kobe, Japan, 12-15 Sep 2016, ISBN 9784885523069

Roberts, T. S. et al. (2016) Strain Balancing of MOVPE InAs/GaAs Quantum Dots Using GaAs0.8P0.2. In: 2016 International Semiconductor Laser Conference (ISLC), Kobe, Japan, 12-15 Sep 2016, ISBN 9784885523069

Taylor, R.J.E., Li, G., Ivanov, P., Childs, D.T.D., Stevens, B.J., Harrison, B., Babazadeh, N., Ignatova, O., and Hogg, R.A. (2016) Mode Control in Photonic Crystal Surface Emitting Lasers Through In-Plane Feedback. In: 2016 International Semiconductor Laser Conference (ISLC), Kobe, Japan, 12-15 Sep 2016, ISBN 9784885523069

Ghazal, O. M. S., Lei, D., Childs, D. T., Stevens, B. J., Babazadeh, N., Hogg, R.A., and Groom, K. M. (2016) GaAs-based Self-Aligned Stripe Superluminescent Diodes Processed Normal to the Cleaved Facet. In: Novel In-Plane Semiconductor Lasers XV, San Francisco, CA, USA, 15-18 Feb 2016, p. 976706. (doi:10.1117/12.2211062)

Tooley, I.G., Childs, D.T.D., Stevens, B.J., Groom, K.M., and Hogg, R.A. (2016) Simulation of Broad Spectral Bandwidth Emitters at 1060 nm for Optical Coherence Tomography. In: Novel In-Plane Semiconductor Lasers XV, San Francisco, CA, USA, 15-18 Feb 2016, 97671W. (doi:10.1117/12.2211657)

Sobhani, S.A., Childs, D.T., Babazadeh, N., Stevens, B.J., Nishi, K., Sugawara, M., Takemasa, K., and Hogg, R.A. (2016) Study of electro-absorption effects in 1300nm In(Ga)As/GaAs quantum dot materials. In: Physics and Simulation of Optoelectronic Devices XXIV, San Francisco, California, USA, 15-18 Feb 2016, 97420S1. ISBN 9781628419771 (doi:10.1117/12.2213187)

Ivanov, P., Taylor, R. J.E., Li, G., Childs, D. T.D., Khamas, S., Sarma, J., Erdelyi, R., and Hogg, R. A. (2016) Three-Dimensional Finite-Difference Time-Domain Modelling of Photonic Crystal Surface-Emitting Lasers. In: Novel In-Plane Semiconductor Lasers XV, San Francisco, CA, USA, 15-18 Feb 2016, p. 976721. (doi:10.1117/12.2213060)

Taylor, R.J.E., Li, G., Ivanov, P., Childs, D.D., Stevens, B.J., Babazadeh, N., Ignatova, O., Nakano, Y., Tanemura, T., and Hogg, R.A. (2016) Photonic Crystal Surface Emitting Lasers — Coherent Arrays and External Feedback. In: 2016 International Conference Laser Optics, St. Petersburg, Russia, 27 Jun - 01 Jul 2016, R3. ISBN 9781467397384 (doi:10.1109/LO.2016.7549733)

This list was generated on Tue Mar 28 20:41:52 2017 BST.