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Cover Image for Interview with Anne Duncan View Article
Interview with Anne Duncan
Anne Duncan
Jan 01, 0001
In her January 7, 2014 interview with Cody Willis, Anne Duncan reminisces of her time at Winthrop from 1974-1978 as a Physical Education major. This interview was conducted for inclusion into the Louise Pettus Archives and...
Physical education drinking Traditions classes night Coeducation Oral History
Published by: Winthrop University
Cover Image for Waveguide integrated GaN distributed Bragg reflector cavity using low-cost nanolithography View Article
Waveguide integrated GaN distributed Bragg reflector cavity using low-cost nanolithography
Simeng Jia, Emmanuel D. Le Boulbar, Krishna C. Balram, Jon R. Pugh, Tao Wang, Duncan W.E. Allsopp, Philip A. Shields, Martin J. Cryan
Nov 20, 2019

This work presents the design, fabrication and measurement of gallium nitride (GaN) distributed Bragg reflector cavities integrated with input and output grating couplers. The devices are fabricated using a new, low-cost...

Cover Image for Waveguide integrated GaN distributed Bragg reflector cavity using low-cost nanolithography View Article
Waveguide integrated GaN distributed Bragg reflector cavity using low-cost nanolithography
Simeng Jia, Emmanuel D. Le Boulbar, Krishna C. Balram, Jon R. Pugh, Tao Wang, Duncan W.E. Allsopp, Philip A. Shields, Martin J. Cryan
Nov 20, 2019

This work presents the design, fabrication and measurement of gallium nitride (GaN) distributed Bragg reflector cavities integrated with input and output grating couplers. The devices are fabricated using a new, low-cost...

Cover Image for Strong-field terahertz optical sideband generation for wavelength conversion in asymmetric double quantum wells View Article
Strong-field terahertz optical sideband generation for wavelength conversion in asymmetric double quantum wells
J Z Zhang, Duncan Allsopp
Dec 07, 2009
Terahertz (THz) optical sideband generation in asymmetric double quantum wells in strong THz fields is studied theoretically. Both monotonic THz-power dependence and saturation of the first-order sideband intensity can occur...
Cover Image for Faculty Members' Documentary Details Spartanburg's Duncan Park Stadium View Article
Faculty Members' Documentary Details Spartanburg's Duncan Park Stadium
Winthrop University
Jan 01, 0001
"Duncan Park Stadium: 85 Years of Baseball Memories" will air Oct. 20 and Oct. 24 on ETV. Faculty members Mark Nortz and Albert Bolognese started working on the documentary in January 2010.
Published by: Winthrop University
Cover Image for Nanoimprint lithography resist profile inversion for lift-off applications View Article
Nanoimprint lithography resist profile inversion for lift-off applications
Philip A Shields, Duncan W E Allsopp
Sep 01, 2011
A method is described in which the tapered features that are inherent to nanoimprint lithography are inverted to allow successful lift-off. A mold of the relief is created by in-filling the imprinted resist with hydrogen...
Cover Image for Design of ultrahigh-<em>Q</em> 1-D photonic crystal microcavities View Article
Design of ultrahigh-<em>Q</em> 1-D photonic crystal microcavities
Qin Chen, M D Archbold, Duncan W E Allsopp
Mar 01, 2009
finite difference methods filters microresonators optical resonators Q-factor
Cover Image for Design of ultrahigh-<em>Q</em> 1-D photonic crystal microcavities View Article
Design of ultrahigh-<em>Q</em> 1-D photonic crystal microcavities
Qin Chen, M D Archbold, Duncan W E Allsopp
Mar 01, 2009
finite difference methods filters microresonators optical resonators Q-factor
Cover Image for Nanoimprint lithography resist profile inversion for lift-off applications View Article
Nanoimprint lithography resist profile inversion for lift-off applications
Philip A Shields, Duncan W E Allsopp
Sep 01, 2011
A method is described in which the tapered features that are inherent to nanoimprint lithography are inverted to allow successful lift-off. A mold of the relief is created by in-filling the imprinted resist with hydrogen...
Cover Image for Strong-field terahertz optical sideband generation for wavelength conversion in asymmetric double quantum wells View Article
Strong-field terahertz optical sideband generation for wavelength conversion in asymmetric double quantum wells
J Z Zhang, Duncan Allsopp
Dec 07, 2009
Terahertz (THz) optical sideband generation in asymmetric double quantum wells in strong THz fields is studied theoretically. Both monotonic THz-power dependence and saturation of the first-order sideband intensity can occur...
Cover Image for Fabrication of high-aspect ratio GaN nanostructures for advanced photonic devices View Article
Fabrication of high-aspect ratio GaN nanostructures for advanced photonic devices
Emmanuel Le Boulbar, Christopher Lewins, Duncan Allsopp, Christopher Bowen, Philip Shields
Mar 05, 2016
Cover Image for Enhanced light extraction by photonic quasi-crystals in GaN blue LEDs View Article
Enhanced light extraction by photonic quasi-crystals in GaN blue LEDs
Philip A. Shields, Martin D. B. Charlton, Tom Lee, Majd E. Zoorob, Duncan W. E. Allsopp, Wang Nang Wang
Jul 01, 2009
The far-field profile of photonic quasi-crystal patterned and unpatterned LEDs, fabricated from commercial epitaxial substrates by electron beam lithography, has been measured prior to lapping and dicing. Emission enhancements...
Finite difference time domain method light emission photonic crystals LIGHT electroluminescence electron beams
Cover Image for A calibrated UV-LED based light source for water purification and characterisation of photocatalysis View Article
A calibrated UV-LED based light source for water purification and characterisation of photocatalysis
A. Sergejevs, C. T. Clarke, D. W.E. Allsopp, Javier Marugan, A Jaroenworaluck, W. Singhapong, P. Manpetch, R. Timmers, C. Casado, C. R. Bowen
Nov 01, 2017

Photocatalysis has a potential to become a cost effective industrial process for water cleaning. One of the most studied photocatalysts is titanium dioxide which, as a wide band gap semiconductor, requires ultraviolet (UV)...

Cover Image for A calibrated UV-LED based light source for water purification and characterisation of photocatalysis View Article
A calibrated UV-LED based light source for water purification and characterisation of photocatalysis
A. Sergejevs, C. T. Clarke, D. W.E. Allsopp, Javier Marugan, A Jaroenworaluck, W. Singhapong, P. Manpetch, R. Timmers, C. Casado, C. R. Bowen
Nov 01, 2017

Photocatalysis has a potential to become a cost effective industrial process for water cleaning. One of the most studied photocatalysts is titanium dioxide which, as a wide band gap semiconductor, requires ultraviolet (UV)...

Cover Image for Factors influencing surface morphology of anodized TiO 2 nanotubes View Article
Factors influencing surface morphology of anodized TiO 2 nanotubes
Domenico Regonini, A Satka, A Jaroenworaluck, Duncan W E Allsopp, Christopher R Bowen, R Stevens
Jan 01, 0001
This paper investigates the formation mechanism of ribs on the outer wall of anodized TiO 2 nanotubes (NTs) prepared in a NaF/Glycerol electrolyte containing 2 wt% of water. The effect of potential and time on the morphology of...
Cover Image for Fabrication of high-aspect ratio GaN nanostructures for advanced photonic devices View Article
Fabrication of high-aspect ratio GaN nanostructures for advanced photonic devices
Emmanuel Le Boulbar, Christopher Lewins, Duncan Allsopp, Christopher Bowen, Philip Shields
Mar 05, 2016
Cover Image for Quantum well engineering in InGaN/GaN core-shell nanorod structures View Article
Quantum well engineering in InGaN/GaN core-shell nanorod structures
C. G. Bryce, E. D. Le Boulbar, P. M. Coulon, P R Edwards, I. Gîrgel, D. W.E. Allsopp, P. A. Shields, R. W. Martin
Sep 27, 2017

We report the ability to control relative InN incorporation in InGaN/GaN quantum wells (QWs) grown on the semi-polar and non-polar facets of a core-shell nanorod LED structure by varying the growth conditions. A study of the...

cathodoluminescence GAN InGaN LED nanorod Nanostructure
Cover Image for Quantum well engineering in InGaN/GaN core-shell nanorod structures View Article
Quantum well engineering in InGaN/GaN core-shell nanorod structures
C. G. Bryce, E. D. Le Boulbar, P. M. Coulon, P R Edwards, I. Gîrgel, D. W.E. Allsopp, P. A. Shields, R. W. Martin
Sep 27, 2017

We report the ability to control relative InN incorporation in InGaN/GaN quantum wells (QWs) grown on the semi-polar and non-polar facets of a core-shell nanorod LED structure by varying the growth conditions. A study of the...

cathodoluminescence GAN InGaN LED nanorod Nanostructure
Cover Image for Factors influencing surface morphology of anodized TiO 2 nanotubes View Article
Factors influencing surface morphology of anodized TiO 2 nanotubes
Domenico Regonini, A Satka, A Jaroenworaluck, Duncan W E Allsopp, Christopher R Bowen, R Stevens
Jan 01, 0001
This paper investigates the formation mechanism of ribs on the outer wall of anodized TiO 2 nanotubes (NTs) prepared in a NaF/Glycerol electrolyte containing 2 wt% of water. The effect of potential and time on the morphology of...
Cover Image for Investigation of InGaN facet-dependent non-polar growth rates and composition for core-shell LEDs View Article
Investigation of InGaN facet-dependent non-polar growth rates and composition for core-shell LEDs
Ionut Girgel, Paul R. Edwards, Emmanuel Le Boulbar, Pierre-marie Coulon, Suman-Lata Sahonta, Duncan Allsopp, Robert W. Martin, Colin Humphreys, Philip Shields
Mar 06, 2016
Cover Image for Investigation of InGaN facet-dependent non-polar growth rates and composition for core-shell LEDs View Article
Investigation of InGaN facet-dependent non-polar growth rates and composition for core-shell LEDs
Ionut Girgel, Paul R. Edwards, Emmanuel Le Boulbar, Pierre-marie Coulon, Suman-Lata Sahonta, Duncan Allsopp, Robert W. Martin, Colin Humphreys, Philip Shields
Mar 06, 2016
Cover Image for Progressive Recruitment of the Frontoparietal Multiple-demand System with Increased Task Complexity, Time Pressure, and Reward. View Article
Progressive Recruitment of the Frontoparietal Multiple-demand System with Increased Task Complexity, Time Pressure, and Reward.
Sneha Shashidhara, Daniel J Mitchell, Yaara Erez, John Duncan
Sep 05, 2019
A distributed, frontoparietal "multiple-demand" (MD) network is involved in tasks of many different kinds. Integrated activity across this network may be needed to bind together the multiple features of a mental control program...
Adolescent Adult Brain Mapping Female Frontal Lobe Humans Magnetic Resonance Imaging Male Neural Pathways Parietal Lobe Psychomotor Performance Reaction Time Reward Spatial Processing Time Factors Young Adult
Cover Image for Enhanced light extraction by photonic quasi-crystals in GaN blue LEDs View Article
Enhanced light extraction by photonic quasi-crystals in GaN blue LEDs
Philip A. Shields, Martin D. B. Charlton, Tom Lee, Majd E. Zoorob, Duncan W. E. Allsopp, Wang Nang Wang
Jul 01, 2009
The far-field profile of photonic quasi-crystal patterned and unpatterned LEDs, fabricated from commercial epitaxial substrates by electron beam lithography, has been measured prior to lapping and dicing. Emission enhancements...
Finite difference time domain method light emission photonic crystals LIGHT electroluminescence electron beams
Cover Image for Design and fabrication of enhanced lateral growth for dislocation reduction in GaN using nanodashes View Article
Design and fabrication of enhanced lateral growth for dislocation reduction in GaN using nanodashes
Philip Shields, Emmanuel Le Boulbar, J. Priesol, M. Nouf-Allehiani, G. Naresh-Kumar, Sophia Fox, C. Trager-Cowan, A. Šatka, Duncan Allsopp
May 15, 2017
The semiconductor gallium nitride is the material at the centre of energy-efficient solid-state lighting and is becoming increasingly important in high-power and high-frequency electronics. Reducing the dislocation density of...
Cover Image for Design and fabrication of enhanced lateral growth for dislocation reduction in GaN using nanodashes View Article
Design and fabrication of enhanced lateral growth for dislocation reduction in GaN using nanodashes
Philip Shields, Emmanuel Le Boulbar, J. Priesol, M. Nouf-Allehiani, G. Naresh-Kumar, Sophia Fox, C. Trager-Cowan, A. Šatka, Duncan Allsopp
May 15, 2017
The semiconductor gallium nitride is the material at the centre of energy-efficient solid-state lighting and is becoming increasingly important in high-power and high-frequency electronics. Reducing the dislocation density of...

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