2007

2006

2005

2004
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

2007
  • J.-B. Wang, D. Ding, S. R. Johnson, S.-Q. Yu, and Y.-H. Zhang, Determination and improvement of spontaneous emission quantum efficiency in GaAs/AlGaAs heterostructures grown by molecular beam epitaxy, physica status solidi (a), invited paper for a special issue, (accepted).
  • S. R. Johnson, D. Ding, J.-B. Wang, S.-Q. Yu, Y.-H. Zhang, Excitation Dependent Photoluminescence Measurements of Nonradiative Lifetime and Quantum Efficiency in Bulk GaAs/AlGaAs, J. Vac. Sci. Technol. B, (accepted).
  • J.-B. Wang, and Y.-H. Zhang, Increased power conversion efficiency through photon recycling in quantum well lasers, physica status solidi (c), (accepted).
  • S.-Q. Yu, J.-B. Wang, D. Ding, S. R. Johnson, D. Vasileska, Y.-H. Zhang, Fundamental mechanisms of electroluminescence refrigeration in heterostructure light emitting diodes, SPIE Photonics West (2007).
  • S R. Johnson, D. Ding, S.-Q. Yu, J.-B. Wang, Y.-H. Zhang, Optimal bandgap energy for optical refrigeration in semiconductors, SPIE Photonics West, San Jose CA, January 2007.
  • 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, SPIE Photonics West, San Jose CA, January 2007.
  • J.-B. Wang, D. Ding, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Determination of internal quantum efficiency in semiconductors suitable for luminescence refrigeration, SPIE Photonics West, San Jose CA, January 2007.
  • 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, SPIE Photonics West, San Jose CA, January 2007.

2006
  • D. Ding, S. R. Johnson, J.-B. Wang, S.-Q. Yu, Y.-H. Zhang, Intrinsic Irreversibility in Semiconductor Light Emission, Phys. Stat. Sol. (c) (accepted Sept, 2006).
  • J.-B.Wang, S. R. Johnson, D. Ding, S.-Q. Yu, Y.-H. Zhang, Influence of photon recycling on semiconductor luminescence refrigeration , J. Appl. Phys., 100, 043502 (2006)
  • 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.
  • S. R. Johnson, D. Ding, J.-B. Wang, S.-Q. Yu, Y.-H. Zhang, GaAs Quantum Efficiency vs Temperature and Injection, 24th North American Conference on Molecular Beam Epitaxy, Durham NC, October 2006.
  • 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.
  • Y.-H. Zhang, S.-Q. Yu, J.-B. Wang, S. R. Johnson, D. Ding, N. Rider, Latest Progress in the Study of Electroluminescence Refrigeration, 5th Annual Workshop on Laser Cooling of Solids, Albuquerque NM, October 2006.
  • S. R. Johnson, D. Ding, J.-B. Wang, S.-Q. Yu, Y.-H. Zhang, Optical Refrigerator Performance versus Bandgap and Efficiency, 5th Annual Workshop on Laser Cooling of Solids, Albuquerque NM, October 2006.
  • D. Ding, S. R. Johnson, J.-B. Wang, S.-Q. Yu, Y.-H. Zhang, Intrinsic Irreversibility in Light Emission Processes in Semiconductors, The 33rd International Symposium on Compound Semiconductors, ISCS 2006, Vancouver, Canada, August 2006.
  • S. R. Johnson, D. Ding, J.-B. Wang, S.-Q. Yu, Y.-H. Zhang, Influence of Bandgap and Efficiency on Optical Refrigeration, The 33rd International Symposium on Compound Semiconductors, ISCS 2006, Vancouver, Canada, August 2006.
  • S.-Q. Yu, D. Ding, J.-B. Wang, S. R. Johnson, Y.-H. Zhang, Electroluminescence Refrigeration in Semiconductors, Optical Society of America, Conference on Lasers and Electro Optics/Quantum Electronics and Laser Science Conference, CLEO/QELS 2006, Long Beach CA, May 2006.
  • 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.
  • J.-B. Wang, D. Ding, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Photon recycling in luminescence refrigeration, WOCSEMMAD, Scottsdale, AZ, February 2006.
  • 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.
  • S.-Q. Yu, D. Ding, J.-B. Wang, S. R. Johnson, D. Vasileska, Y.-H. Zhang, Electroluminescence Refrigeration in Semiconductor Light Emitting Diodes, SPIE Photonics West, San Jose CA, January 2006.

2005

  • 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).
  • 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).
  • 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).
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.