Articles in Refereed Journals
40 S. R. Johnson, D. Ding, J.-B. Wang, S.-Q. Yu, and Y.-H. Zhang, Excitation Dependent
Photoluminescence Measurements of the Nonradiative Lifetime and Quantum Efficiency
in GaAs, J. Vac. Sci. Technol. B (Submitted October 2006).
39 D. Ding, S. R. Johnson, J.-B. Wang, S.-Q. Yu, Y.-H. Zhang, Intrinsic irreversibility in
semiconductor light emission, Physica Status Solidi (C), (in Press).
38 J.-B. Wang, S. R. Johnson, D. Ding, S.-Q. Yu, Y.-H. Zhang, Influence of photon recycling
on cooling efficiency and cooling power in semiconductor luminescence refrigeration, J. of
Appl. Phys. 100, 043502 (2006).
37 N. Samal, S. R. Johnson, D. Ding, A. K. Samal, S.-Q. Yu, Y.-H. Zhang, High-Power
Single-Mode Vertical-Cavity Surface-Emitting Lasers, Appl. Phys. Lett. 87, 161108 (2005).
36 J.-B. Wang, S. R. Johnson, S. A. Chaparro, D. Ding, Y. Cao, Yu. G. Sadofyev, Y.-H.
Zhang, Band Edge Alignment of Pseudomorphic GaAs 1-ySby on GaAs, Phys. Rev. B 70,
195339 (2004).
35 S. R. Johnson, Yu. G. Sadofyev, D. Ding, Y. Cao, S. A. Chaparro, K. Franzreb, Y.-H.
Zhang, Sb-Mediated Growth of n and p Type AlGaAs by Molecular Beam Epitaxy, J. Vac.
Sci. Technol. B 22, 1436 (2004).
34 Yu. G. Sadofyev, S. R. Johnson, S. A. Chaparro, Y. Cao, D. Ding, J.-B. Wang, K.
Franzreb, Y.-H. Zhang, Sb-Mediated Growth of Si Doped AlGaAs by Molecular Beam
Epitaxy, Appl. Phys. Lett. 84, 3546 (2004).
33 S. R. Johnson, C.-Z. Guo, S. A. Chaparro, Yu. G. Sadofyev, J.-B. Wang, Y. Cao, N.
Samal, X. Jin, S.-Q. Yu, D. Ding, Y.-H. Zhang, GaAsSb/GaAs Band Alignment Evaluation
for Long-Wave Photonic Applications, J. Crystal Growth 251, 521 (2003).
32 Y. C. Zhang, C. J. Huang, X. L. Ye, B. Xu, D. Ding, J. Z. Wang, Y. F. Li, F. Q. Liu, Z. G.
Wang, Structure and photoluminescence of InGaAs quantum dots formed on an InAlAs
wetting layer, Chinese Phys. Lett. 18, 1411 (2001).
31 H. Y. Liu, B. Xu, Y. Q. Wei, D. Ding, J. J. Qian, Q. Han, J. B. Liang, Wang ZG, High-power
and long-lifetime InAs/GaAs quantum-dot laser at 1080 nmr, Appl. Phys. Lett. 79, 2868
(2001).
30 F. Q. Liu, Q. S. Zhang, Y. Z. Zhang, D. Ding, B. Xu, Z. G. Wang, Growth and
characterization of InGaAs/InAlAs quantum cascade lasers, Solid-State Electronics 45,
1831 (2001).
29 Y. C. Zhang, C. J. Huang, F. Q. Liu, B. Xu, J. Wu, Y. H. Chen, D. Ding, W. H. Jiang, X. L.
Ye, Z. G. Wang, Thermal redistribution of photocarriers between bimodal quantum dots, J.
of Appl. Phys. 90, 1973 (2001).
28 H. Y. Liu, B. Xu, J. J. Qian, X. L. Ye, Q. Han, D. Ding, J. B. Liang, X. R. Zhong, Z. G.
Wang, Effect of growth temperature on luminescence and structure of self-assembled
InAlAs/AlGaAs quantum dots, J. of Appl. Phys. 90, 2048 (2001).
27 Wei YQ, Liu HY, Chai CL, Xu B, Ding D, Wang ZG, Unusual temperature-dependent
optical properties of self-organized InAs/GaAs quantum dots at high excitation power,
Chinese Phys. Lett. 18, 982 (2001).
26 H. Y. Liu, B. Xu, D. Ding, Y. H. Chen, J. F. Zhang, J. Wu, Z. G. Wang, Size and shape
evolution of self-assembled coherent InAs/GaAs quantum dots influenced by seed layer,
J. of Crystal Growth 227, 1005 (2001).
25 Y. C. Zhang, C. J. Huang, B. Xu, X. L. Ye, D. Ding, J. Z. Wang, Y. F. Li, F. Liu, Z. G.
Wang, Optical properties of InGaAs quantum dots formed on InAlAs wetting layer, J. of
Crystal Growth 224, 41 (2001).
24 Y. F. Li, F. Lin, B. Xu, F. Q. Liu, W. L. Ye, D. Ding, Z. G. Wang, Influence of growth
conditions on self-assembled InAs nanostructures grown on (001)InP substrate by
molecular beam epitaxy, J. of Crystal Growth 223, 518 (2001).
23 Y. F. Li, J. Z. Wang, X. L. Ye, B. Xu B, F. Q. Liu, D. Ding, J. F. Zhang, Z. G. Wang, InAs
self-assembled quantum dots grown on an InP (311)B substrate by molecular beam
epitaxy, J. of Appl. Lett. 89, 4186 (2001).
22 W. H. Jiang, H. Z. Xu, B. Xu, W. Zhou, Q. Gong, D. Ding, J. B. Liang, Z. G. Wang,
Substrate dependence of InGaAs quantum dots grown by molecular beam epitaxy, J. Vac.
Sci. Technol. B 19, 197 (2001).
21 F. Q. Liu, D. Ding, B. Xu, Y. Z. Zhang, Q. S. Zhang, Z. G. Wang, D. S. Jiang, B. Q. Sun,
Strain-compensated quantum cascade lasers operating at room temperature, J. of Crystal
Growth 220, 439(2000).
20 H. Y. Liu, X. D. Wang, Y. Q. Wei, B. Xu, D. Ding, Z. G. Wang, Effects of interdiffusion on
the luminescence of InAs/GaAs quantum dots covered by InGaAs overgrowth layer, J. of
Crystal Growth 220, 216 (2000).
19 Y. C. Zhang, C. J. Huang, F. Q. Liu, B. Xu, D. Ding, W. H. Jiang, Y. F. Li, X. L. Ye, J. Wu,
Y. H. Chen, Z. G. Wang, Temperature dependence of electron redistribution in
modulation-doped InAs/GaAs quantum dots, J. of Crystal Growth 219, 199 (2000).
18 H. Y. Liu, B. Xu, Y. H. Chen, D. Ding, Wang ZG, Effects of seed layer on the realization of
larger self-assembled coherent InAs/GaAs quantum dots, J. of Appl. Lett. 88, 5433 (2000).
17 Z. Z. Sun, J. Wu, Y. H. Chen, F. Q. Liu, D. Ding, Y. F. Li, B. Xu, Z. G. Wang, The effect of
substrate orientation on the morphology of InAs nanostructures on (001) and
(11n)A/B(n=1-5) InP substrates, J. of Crystal Growth 218, 203 (2000).
16 Y. F. Li, X. L. Ye, B. Xu, F. Q. Liu, D. Ding, W. H. Jiang, Z. Z. Sun, Y. C. Zhang, H. Y. Liu,
Z. G. Wang, Room temperature 1.55 mu m emission from InAs quantum dots grown on
(001)InP substrate by molecular beam epitaxy, J. of Crystal Growth 218, 451 (2000).
15 Y. F. Li, F. Q. Liu, B. Xu, X. L. Ye, D. Ding, Z. Z. Sun, W. H. Jiang, H. Y. Liu, Y. C. Zhang,
Z. G. Wang, Two-dimensional ordering of self-assembled InAs quantum dots grown on
(311)B InP substrate, J. of Crystal Growth 219, 17 (2000).
14 Y. F. Li, X. L. Ye, F. Q. Liu, B. Xu, D. Ding, W. H. Jiang, Z. Z. Sun, Y. C. Zhang, H. Y. Liu,
Z. G. Wang, Structural and optical characterization of InAs nanostructures grown on (001)
and high index InP substrates, Applied Surface Science 167, 191 (2000).
13 H. Y. Liu, X. D. Wang, J. Wu, B. Xu, Y. Q. Wei, W. H. Jiang, D. Ding, X. L. Ye, F. Lin, J. F.
Zhang, J. B. Liang, Z. G. Wang, Structural and optical properties of self-assembled
InAs/GaAs quantum dots covered by InxGa1-xAs (0 <= x <= 0.3), J. of Appl. Phys. 88,
3392 (2000).
12 W. H. Jiang, X. L. Ye, B. Xu, H. Z. Xu, D. Ding, J. B. Liang, Z. G. Wang, Anomalous
temperature dependence of photoluminescence from InAs quantum dots, J. of Appl. Phys.
88, 2529 (2000).
11 W. H. Jiang, H. Z. Xu, B. Xu, X. L. Ye, W. Zhou, D. Ding, J. B. Liang, Z. G. Wang,
Influence of substrate orientation on In0.5Ga0.5As/GaAs quantum dots grown by
molecular beam epitaxy, Physica E 8, 134 (2000).
10 Z. Z. Sun, F. Q. Liu, J. Wu, X. L. Ye, D. Ding, B. Xu, J. B. Liang, Z. G. Wang, Optical
properties of self-assembled ternary In(GA/Al)As quantum dots on (100) and (N 1 1)B InP
substrates, Physica E 8, 164 (2000).
09 H. Y. Liu, W. Zhou, D. Ding, W. H. Jiang, B. Xu, J. B. Liang, Z. G. Wang, Self-organized
type-II In0.55Al0.45As/Al0.50Ga0.50As quantum dots realized on GaAs(311)A, Appl.
Phys. Lett. 76, 3741 (2000).
08 H. Y. Liu, X. D. Wang, B. Xu, D. Ding, W. H. Jiang, J. Wu, Z. G. Wang, Effect of
In-mole-fraction in InGaAs overgrowth layer on self-assembled InAs/GaAs quantum dots,
J. of Crystal Growth 213, 193 (2000).
07 W. H. Jiang, H. Z. Xu, B. Xu, X. L. Ye, J. Wu, D. Ding, J. B. Liang, Z. G. Wang, Annealing
effect on the surface morphology and photoluminescence of InGaAs/GaAs quantum dots
grown by molecular beam epitaxy, J. of Crystal Growth 212, 356 (2000).
06 H. Y. Liu, B. Xu, Q. Gong, D. Ding, F. Q. Liu, Y. H. Chen, W. H. Jiang, X. L. Ye, Y. F. Li, Z.
Z. Sun, J. F. Zhang, J. B. Liang, Z. G. Wang, Temperature and excitation power
dependence of the optical properties of InAs self-assembled quantum dots grown between
two Al0.5Ga0.5As confining layers, J. of Crystal Growth 210, 451 (2000).
05 W. Zhou, B. Xu, H. Z. Xu, W. H. Jiang, F. Q. Liu, Q. Gong, D. Ding, J. B. Liang, Z. G.
Wang, Z. M. Zhu, G. H. Li, Photoluminescence study of InAlAs quantum dots grown on
differently oriented surfaces, J. Vac. Sci. Technol. B 18, 21 (2000).
04 Z. Z. Sun, D. Ding, Q. Gong, W. Zhou, B. Xu, Z. G. Wang, Quantum-dot superluminescent
diode: A proposal for an ultra-wide output spectrum, Optical and Quantum Electronics 31,
1235 (1999).
03 W. H. Jiang, H. Z. Xu, B. Xu, W. Zhou, Q. Gong, D. Ding, J. B. Liang, Z. G. Wang, Indium
composition dependence of the size uniformity of InGaAs quantum dots on (311)B GaAs
grown by molecular beam epitaxy, J. of Materials Science & Technology 15, 523 (1999).
02 Z. Z. Sun, F. Q. Liu, D. Ding, B. Xu, Z. G. Wang, Self-assembled InAs and In0.9Al0.1As
quantum dots on (001)InP substrates grown by molecular beam epitaxy (MBE), J. of
Crystal Growth 204, 24 (1999).
01 Q. Gong, J. B. Liang, B. Xu, D. Ding, H. X. Li, C. Jiang, W. Zhou, F. Q. Liu, Z. G. Wang, X.
H. Qiu, G. Y. Shang, C. L. Bai, Analysis of atomic force microscopic results of InAs islands
formed by molecular beam epitaxy, J. of Crystal Growth 192, 376 (1998).
Articles and Abstracts in Conference Proceedings
28 S. R. Johnson, D. Ding, S.-Q. Yu, J.-B. Wang, Y.-H. Zhang, Optimal bandgap energy for
optical refrigeration in semiconductors, Accepted for SPIE Photonics West (2007).
27 J.-B. Wang, D. Ding, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Experimental determination of
internal quantum efficiency for semiconductor luminescence refrigeration, Accepted for
SPIE Photonics West (2007).
26 N. Rider, S.-Q. Yu, J.-B. Wang, D. Ding, S. R. Johnson, Y.-H. Zhang, Highly Reflective
Non-Alloyed Ohmic Contacts on n-type GaAs, Accepted for SPIE Photonics West (2007).
25 S.-Q. Yu, N. Rider, J.-B. Wang, D. Ding, S. R. Johnson, Y.-H. Zhang, High extraction
efficiency light emitting diodes for electroluminescence refrigeration, Accepted for SPIE
Photonics West (2007).
24 S. R. Johnson, J.-B. Wang, D. Ding, S.-Q. Yu and Y.-H. Zhang, Temperature Dependent
Measurements of the Nonradiative Coefficients in MBE Grown GaAs/AlGaAs
Heterostructures using Excitation Dependent Photoluminescence, 24th North American
Conference on Molecular Beam Epitaxy (2006).
23 S. R. Johnson, D. Ding, J.-B. Wang, S.-Q. Yu and Y.-H. Zhang, Influence of Bandgap and
Quantum Efficiency on Optical Refrigeration, International symposium of compound
semiconductor, 2006-ISCS, Vancouver, CA.
22 D. Ding, S. R. Johnson, J.-B. Wang, S.-Q. Yu, and Y.-H. Zhang, Intrinsic Irreversibility in
Light Emission Processes in Semiconductors, International symposium of compound
semiconductor, 2006-ISCS, Vancouver, CA.
21 S.-Q. Yu, J.-B. Wang, D. Ding, N. Samal, S. R. Johnson, Y.-H. Zhang, Gain-Peak
Cavity-Mode Tuning in 1.3 μm GaAsSb VCSELs, International symposium of compound
semiconductor, 2006-ISCS, Vancouver, CA.
20 S.-Q. Yu, D. Ding, J.-B. Wang, S. R. Johnson, Y.-H. Zhang, Electroluminescence
Refrigeration in Semiconductors, Conference on Lasers and Electro-Optics,
2006-CLEO/IQEC.
19. Y.-H. Zhang, J.-B. Wang, D. Ding, S.-Q. Yu, S. R. Johnson, Theoretical Limits of
Electro-luminescence Refrigeration in Semiconductors, SPIE Photonics West (2006).
18 S.-Q. Yu, D. Ding, R. Gupta, X. Jin, Shane Johnson, J. Gu, Y.-H. Zhang, VCSEL structure
embedded in metal heat sink for optimal thermal management, SPIE Photonics West
(2006).
17 J.-B. Wang, D. Ding, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Photoluminescence
refrigeration in semiconductors, SPIE Photonics West (2006).
16 S.-Q. Yu, D. Ding, J.-B. Wang, S. R. Johnson, D. Vasileska, Y.-H. Zhang,
Electroluminescence refrigeration in semiconductor light emission diodes, SPIE Photonics
West (2006).
15 S.-Q. Yu, J.-B. Wang, D. Ding, S. R. Johnson, Y.-H. Zhang, Interplay of thermoelectric
Cooling and Electroluminescence Refrigeration in LEDs, Proceedings of the 24th
International Conference on Thermoelectrics, ITC 2005 (2005).
14 D. Ding, J.-B. Wang, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Optimal Bandgap Energy for
Optical Refrigeration in Semiconductors, SPIE 50th Annual Meeting/Optics & Photonics
(2005).
13 D. Ding, J.-B. Wang, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Thermodynamic Analysis of
Optical Refrigeration in Semiconductors, Conference on Lasers and Electro-Optics,
2005-CLEO/IQEC Technical Digest (2005).
12 J.-B. Wang, D. Ding, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Electroluminescence Cooling
in Semiconductors, Conference on Lasers and Electro-Optics, 2005-CLEO/IQEC
Technical Digest (2005).
11 N. Samal, S. R. Johnson, D. Ding, A. K. Samal, Y.-H. Zhang, Novel VCSEL Design with
Tailored Spatial Current Injection for High-Power Single-Mode Operation, SPIE Photonics
West (2005).
10 S. R. Johnson, Y. Cao, Yu. G. Sadofyev, D. Ding, J.-B. Wang, Y.-H. Zhang,
Surfactant-Mediated Molecular-Beam-Epitaxy Growth for Device Applications, 22nd North
American Conference on Molecular Beam Epitaxy (2004).
09 J.-B. Wang, S. R. Johnson, S. A. Chaparro, J. A. Gupta, Yu. G. Sadofyev, D. Ding, Y.-H.
Zhang, Temperature dependent bandgap energy and conduction band offset of GaAsSb
on GaAs, Proceedings of the 27th International Conference on the Physics of
Semiconductors (2004).
08 S.-Q. Yu, X. Jin, Y. Cao, D. Ding, J.-B. Wang, S. R. Johnson, Y.-H. Zhang, P. Dowd, M.
Adamcyk, S. A. Chaparro, Above Room Temperature CW Edge-Emitting Lasers with
GaAsP/GaAs/GaAsSb Active Regions, Optical Society of America, Conference on Lasers
and Electro-Optics, 2004-CLEO/IQEC Technical Digest (2004).
07 X. Jin, S.-Q. Yu, Y. Cao, D. Ding, J.-B. Wang, N. Samal, Yu. G. Sadofyev, S. R. Johnson,
Y.-H. Zhang, 1.3 µm GaAsSb Resonant-Cavity Light-Emitting Diodes Grown on GaAs
Substrate, Proceedings of the IEEE Lasers and Electro-Optics Society 16th Annual
Meeting, 69 (2003).
06 S. R. Johnson, Yu. G. Sadofyev, K. Franzreb, Y. Cao, D. Ding, N. Samal, S. A. Chaparro,
J.-B. Wang, X. Jin, S.-Q. Yu, Y.-H. Zhang, Sb-Mediated Growth of Si and Be Doped
AlGaAs by Molecular Beam Epitaxy, 21st North American Conference on Molecular Beam
Epitaxy (2003).
05 J.-B. Wang, S. R. Johnson, C. Z. Guo, S. A. Chaparro, J. A. Gupta, Yu. G. Sadofyev, Y.
Cao, N. Samal, X. Jin, S.-Q. Yu, D. Ding, Y.-H. Zhang, Determination of GaAs/GaAsSb
Heterojunction Conduction Band Offset, Proceedings of the 2003 International
Symposium on Compound Semiconductors, IEEE Catalog Number: 03TH8675, 217
(2003).
04 N. Samal, Y. Cao, D. Ding, J.-B. Wang, S.-Q. Yu, X. Jin, S. A. Chaparro, Yu. G. Sadofyev,
S. R. Johnson, Y.-H. Zhang, Room Temperature CW Operation of Long Wavelength
GaAsSb/GaAs VCSELs Grown on GaAs, SPIE Photonics West (2003).
03 S. R. Johnson, C.-Z. Guo, S. A. Chaparro, Yu. G. Sadofyev, J.-B. Wang, Y. Cao, N.
Samal, C. Navarro, X. Jin, S.-Q. Yu, D. Ding, Y.-H. Zhang, Band Alignment Determination
of MBE Grown GaAsSb on GaAs with 1300 nm Emission, 12th International Conference on
Molecular Beam Epitaxy, MBE XII (2002).
02 Y.-H. Zhang, S. R. Johnson, C.-Z. Guo, N. Samal, J.-B. Wang, S.-Q. Yu, Y. Cao, D. Ding,
S. Chaparro, Yu. G. Sadofyev, X. Jin, C. Navarro, D. J. Smith, Room Temperature CW
Operation of 1.3 µm Strain-Compensated GaAsP/GaAs/GaAsSb MQW VCSELs Grown
on GaAs, Asia-Pacific Optical and Wireless Communications Conference, APOC-2002
Proceedings (2002).
01 S. R. Johnson, S. Wu, Yu. G. Sadofyev, Y. Cao, S. A. Chaparro, J.-B. Wang, N. Samal,
S.-Q. Yu, C. Navarro, X. Jin, Z.-B. Chen, D. Ding, N. Newman, Y.-H. Zhang, Nitrogen
Plasma Ion and Neutral Energy Spectra and Dilute Nitride Growth, 20th North American
Conference on Molecular Beam Epitaxy (2001).
Patents
02 S.-Q. Yu, Y.-H. Zhang, D. Ding, Longer Life-time Integrated Solar Cells and
Thermoelectric Power Generator for Space Applications, ASU invention disclosure, case
number M5-018.
01 Y.-H. Zhang, D. Ding, S. R. Johnson, J.-B. Wang, Semiconductor Photoluminescence and
Electroluminescence Upconversion Refrigeration, US provisional filed April 2004.
Invited Talks
04 Y.-H. Zhang, J.-B. Wang, D. Ding, S.-Q. Yu, S. R. Johnson, Theoretical Limits of
Electro-luminescence Refrigeration in Semiconductors, SPIE Photonics West, San Jose
CA, January 2006.
03 S. R. Johnson, P. Dowd, S. A. Chaparro, S. A. Feld, M. Adamcyk, N. Samal, X. Jin, M. P.
Horning, J.-B. Wang, S. Q. Yu, D. Ding, Y. Cao, Yu. G. Sadofyev, Y.-H. Zhang, Long
Wavelength 1.3 µm GaAsSb/GaAs VCSELs on GaAs Substrates, 21st North American
Conference on Molecular Beam Epitaxy: Workshop, Keystone CO, September 2003.
02 Y.-H. Zhang, S. R. Johnson, C.-Z. Guo, N. Samal, J.-B. Wang, S.-Q. Yu, Y. Cao, D. Ding,
S. A. Chaparro, Yu. G. Sadofyev, X. Jin, C. Navarro, D. J. Smith, Room Temperature CW
Operation of 1.3 µm Strain-Compensated GaAsP/GaAs/GaAsSb MQW VCSELs Grown
on GaAs, Asia-Pacific Optical and Wireless Communications Conference (APOC-2002),
Shanghai China, October 2002.
01 S. R. Johnson, Y.-H. Zhang, C.-Z. Guo, S. A. Chaparro, Yu. G. Sadofyev, Y. Cao, D. Ding,
J.-B. Wang, N. Samal, P. Dowd, C. Navarro, J. Xu, S.-Q. Yu, D. J. Smith,
GaAsP/GaAs/GaAsSb Long Wavelength VCSELs Grown by MBE, Fourteenth American
Conference on Crystal Growth & Epitaxy, Seattle WA, August 2002.
Conference Presentations
38 S. R. Johnson, J.-B. Wang, D. Ding, S.-Q. Yu and Y.-H. Zhang, Temperature Dependent
Measurements of the Nonradiative Coefficients in MBE Grown GaAs/AlGaAs
Heterostructures using Excitation Dependent Photoluminescence, 24th North American
Conference on Molecular Beam Epitaxy (2006).
37 Y.-H. Zhang, S.-Q. Yu, S. R. Johnson, J.-B. Wang, D. Ding, Latest Progresses in the
Study of Electroluminescence Refrigeration, 5th Annual Workshop on Laser Cooling of
Solids, Albuquerque NM, June 2006.
36 S. R. Johnson, J.-B. Wang, D. Ding, S.-Q. Yu, Y.-H. Zhang, Performance of
semiconductor optical refrigerators in terms of bandgap energy and conversion efficiency,
5th Annual Workshop on Laser Cooling of Solids, Albuquerque NM, June 2006.
35 J.-B. Wang, D. Ding, S. R. Johnson, S.-Q. Yu, Y.-H. Zhang, Determination of internal
quantum efficiency in semiconductors suitable for luminescence refrigeration, 5th Annual
Workshop on Laser Cooling of Solids, Albuquerque NM, June 2006.
34 S.-Q. Yu, N. Rider, D. Ding, J.-B. Wang, S. R. Johnson, Y.-H. Zhang, A general device
platform for semiconductor optical refrigeration, 5th Annual Workshop on Laser Cooling of
Solids, Albuquerque NM, June 2006.
33 S. R. Johnson, D. Ding, J.-B. Wang, S.-Q. Yu, and Y.-H. Zhang, Influence of Bandgap and
Quantum Efficiency on Optical Refrigeration, International symposium of compound
semiconductor, 2006-ISCS, Vancouver, CA.
32 D. Ding, S. R. Johnson, J.-B. Wang, S.-Q. Yu, and Y.-H. Zhang, Intrinsic Irreversibility in
Light Emission Processes in Semiconductors, International symposium of compound
semiconductor, 2006-ISCS, Vancouver, CA.
31 S.-Q. Yu, J.-B. Wang, D. Ding, N. Samal, S. R. Johnson, Y.-H. Zhang, Gain-Peak
Cavity-Mode Tuning in 1.3 μm GaAsSb VCSELs, International symposium of compound
semiconductor, 2006-ISCS, Vancouver, CA.
30 S.-Q. Yu, D. Ding, J.-B. Wang, S. R. Johnson, Y.-H. Zhang, Electroluminescence
Refrigeration in Semiconductors, Conference on Lasers and Electro-Optics,
2006-CLEO/IQEC.
29 S.-Q. Yu, J.-B. Wang, D. Ding, S. R. Johnson, Y.-H. Zhang, Device fabrication and
characterization challenges for electroluminescence refrigeration in semiconductors,
WOCSEMMAD, Scottsdale, AZ, February, 2006.
28 J.-B. Wang, D. Ding, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Photon recycling in
luminescence refrigeration, WOCSEMMAD, Scottsdale, AZ, February, 2006.
27 S.-Q. Yu, D. Ding, R. Gupta, X. Jin, Shane Johnson, J. Gu, Y.-H. Zhang, VCSEL structure
embedded in metal heat sink for optimal thermal management, SPIE Photonics West, San
Jose CA, January 2006.
26 J.-B. Wang, D. Ding, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Photoluminescence
refrigeration in semiconductors, SPIE Photonics West, San Jose CA, January 2006.
25 S.-Q. Yu, D. Ding, J.-B. Wang, S. R. Johnson, D. Vasileska, Y.-H. Zhang,
Electroluminescence refrigeration in semiconductor light emission diodes, SPIE Photonics
West, San Jose CA, January 2006.
24 D. Ding, J.-B. Wang, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Optimal Bandgap Energy for
Optical Refrigeration in Semiconductors, SPIE 50th Annual Meeting/Optics & Photonics
2005, San Diego CA, August 2005.
23 S.-Q. Yu, J.-B. Wang, D. Ding, S. R. Johnson, Y.-H. Zhang, Interplay of thermoelectric
Cooling and Electroluminescence Refrigeration in LEDs, 24th International Conference on
Thermoelectrics, ITC 2005, Clemson SC, June 2005.
22 S. R. Johnson, D. Ding, J.-B. Wang, S.-Q. Yu, Y.-H. Zhang, Optical Refrigeration Window
in Terms of Bandgap Energy and Optical Thickness, 4th Annual Workshop on Laser
Cooling of Solids, Albuquerque NM, June 2005.
21 D. Ding, S. R. Johnson, J.-B. Wang, S.-Q. Yu, Y.-H. Zhang, Thermodynamics of Optical
Refrigeration in Semiconductors, 4th Annual Workshop on Laser Cooling of Solids,
Albuquerque NM, June 2005.
20 J.-B. Wang, D. Ding, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Cooling Efficiency and
Cooling Power of Semiconductor Electroluminescence Refrigeration, 4th Annual Workshop
on Laser Cooling of Solids, Albuquerque NM, June 2005.
19 J.-B. Wang, D. Ding, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Impact of Photon Recycling
on Photoluminescence Refrigeration in Semiconductors, 4th Annual Workshop on Laser
Cooling of Solids, Albuquerque NM, June 2005.
18 S.-Q. Yu, D. Ding, J.-B. Wang, S. R. Johnson, Y.-H. Zhang, Interplay of Thermoelectric
Cooling and Electric Luminescence Cooling in LEDs, 4th Annual Workshop on Laser
Cooling of Solids, Albuquerque NM, June 2005.
17 D. Ding, S. R. Johnson, J.-B. Wang, S.-Q. Yu, Y.-H. Zhang, Thermodynamics of Optical
Refrigeration in Semiconductors, Conference on Lasers and Electro Optics/International
Quantum Electronics Conference, 2005 CLEO/IQEC, Baltimore MD, May 2005.
16 J.-B. Wang, D. Ding, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Electroluminescence Cooling
in Semiconductors, Conference on Lasers and Electro-Optics, Conference on Lasers and
Electro Optics/International Quantum Electronics Conference, 2005 CLEO/IQEC,
Baltimore MD, May 2005.
15 N. Samal, S. R. Johnson, D. Ding, A. K. Samal, Y.-H. Zhang, Novel VCSEL Design with
Tailored Spatial Current Injection for High-Power Single-Mode Operation, SPIE Photonics
West, San Jose CA, January 2005.
14 S. R. Johnson, Y. Cao, Yu. G. Sadofyev, D. Ding, J.-B. Wang, Y.-H. Zhang, J. A Gupta,
Mediated MBE for Device Applications, 22nd North American Conference on Molecular
Beam Epitaxy, Banff AB, October 2004.
13 J.-B. Wang, S. R. Johnson, S. A. Chaparro, J. A. Gupta, Yu. G. Sadofyev, D. Ding, Y.-H.
Zhang, Temperature dependent bandgap energy and conduction band offset of GaAsSb
on GaAs, 27th International Conference on the Physics of Semiconductors, ICPS-27,
Flagstaff AZ, July 2004.
12 N. Samal, S. R. Johnson, D. Ding, A. Samal, Y.-H. Zhang, Gain Guided High-Power
Single-Mode VCSELs, IEEE Lasers and Electro-Optics Society Semiconductor Laser
Workshop, San Francisco CA, May 2004.
11 S.-Q. Yu, X. Jin, Y. Cao, D. Ding, J.-B. Wang, S. R. Johnson, Y.-H. Zhang, P. Dowd, M.
Adamcyk, S. A. Chaparro, Above Room Temperature CW Edge-Emitting Lasers with
GaAsP/GaAs/GaAsSb Active Regions, Optical Society of America, Conference on Lasers
and Electro Optics/International Quantum Electronics Conference, 2004 CLEO/IQEC, San
Francisco CA, May 2004.
10 Y. Cao, S.-Q. Yu, X. Jin, D. Ding, J.-B. Wang, S. R. Johnson, Y.-H. Zhang, Tunable MWIR
Diode Lasers Gas Sensing Applications, Transportation and Homeland Security, 3rd Micro
Sensor Workshop, Scottsdale AZ, April 2004.
09 X. Jin, S.-Q. Yu, Y. Cao, D. Ding, J.-B. Wang, N. Samal, Yu. G. Sadofyev, S. R. Johnson,
Y.-H. Zhang, 1.3 µm GaAsSb Resonant-Cavity Light-Emitting Diodes Grown on GaAs
Substrate, IEEE Lasers and Electro-Optics Society 16th Annual Meeting, Tucson AZ,
October 2003.
08 Yu. G. Sadofyev, S. R. Johnson, S. A. Chaparro, Y. Cao, D. Ding, N. Samal, K. Franzreb,
Y.-H. Zhang, Sb-Mediated Growth of Si and Be Doped AlGaAs by Molecular Beam
Epitaxy, 2003 Lawrence Symposium on Critical Issues in Epitaxy, Tempe AZ, October
2003.
07 Y. Cao, S.-Q. Yu, X. Jin, D. Ding, J.-B. Wang, S. R. Johnson, Y.-H. Zhang, Room
Temperature CW Operation of 2.1 µm Quantum Well Lasers Grown on GaSb, 21st North
American Conference on Molecular Beam Epitaxy: Workshop, Keystone CO, September
2003.
06 S. R. Johnson, Yu. G. Sadofyev, K. Franzreb, Y. Cao, D. Ding, N. Samal, S. A. Chaparro,
J.-B. Wang, X. Jin, S.-Q. Yu, Y.-H. Zhang, Sb-Mediated Growth of Si and Be Doped
AlGaAs by Molecular Beam Epitaxy, 21st North American Conference on Molecular Beam
Epitaxy, Keystone CO, September 2003.
05 J.-B. Wang, S. R. Johnson, C. Z. Guo, S. A. Chaparro, J. A. Gupta, Yu. G. Sadofyev, Y.
Cao, N. Samal, X. Jin, S.-Q. Yu, D. Ding, Y.-H. Zhang, Determination of GaAs/GaAsSb
Heterojunction Conduction Band Offset, 2003 International Symposium on Compound
Semiconductors, San Diego CA, August 2003.
04 Yu. G. Sadofyev, S. R. Johnson, S. Chaparro, Y. Cao, D. Ding, N. Samal, K. Franzreb,
Y.-H. Zhang, Sb-Mediated Growth of Si and Be Doped AlGaAs by Molecular Beam
Epitaxy, 11th International Symposium Nanostructures: Physics and Technology, St
Petersburg, Russia, June 2003.
03 N. Samal, Y. Cao, D. Ding, J.-B. Wang, S.-Q. Yu, X. Jin, S. Chaparro, Yu. G. Sadofyev, S.
R. Johnson, Y.-H. Zhang, Room Temperature CW Operation of Long Wavelength
GaAsSb/GaAs VCSELs Grown on GaAs, SPIE Photonics West, San Jose CA, January
2003.
02 S. R. Johnson, C.-Z. Guo, S. Chaparro, Yu. G. Sadofyev, Y. Cao, D. Ding, J.-B. Wang, N.
Samal, X. Jin, S.-Q. Yu, D. J. Smith, Y.-H. Zhang, Evaluating the Band Alignment of MBE
Grown GaAsSb on GaAs, 12th International Conference on Molecular Beam Epitaxy, MBE
XII, San Francisco CA, September 2002.
01 S. R. Johnson, S. Wu, Yu. G. Sadofyev, Y. Cao, S. Chaparro, J.-B. Wang, N. Samal, S.-Q.
Yu, C. Navarro, X. Jin, Z.-B. Chen, D. Ding, C.-Z. Guo, N. Newman, Y.-H. Zhang, Ion and
Neutral Energy Spectra for Dilute Nitride Growth, 20th North American Conference on
Molecular Beam Epitaxy, Providence RI, October 2001.