Boston University

Optical Characterization and Nanophotonics Laboratory

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[Journal Articles][Conference Papers]

William D. Herzog

Graduate Research Assistant
Doctor of Philosophy
MIT Lincoln Laboratory
244 Wood Street
Lexington, MA 02420
Office: (781) 981-2558

Projects

Gallium Nitride Characterization

Near-field Scanning Optical Microscopy of Laser Diodes

Journal Articles

8.) W. D. Herzog, G. E. Bunea, M. S. Ünlü, B. B. Goldberg, and R. J. Molnar, "Spectroscopy of competing mechanisms generating stimulated emission in gallium nitride," Applied Physics Letters, Vol. 77, No. 25, 18 December 2000, pp. 4145-4147

7.) W. D. Herzog, B. B. Goldberg, and M. S. Ünlü, "Beam steering in narrow-stripe high-power 980-nm laser diodes ," IEEE Photonics Technology Letters , Vol. 12, No. 12, December 2000, pp. 1604-1606

6.) G. E. Bunea, W. D. Herzog, M. S. Ünlü, B. B. Goldberg, and R. J. Molnar, "Time Resolved Photoluminescence Studies of Free and Donor-Bound Exciton in GaN grown by HVPE," Applied Physics Letters, Vol. 75, No. 6, 9 August 1999, pp. 838-840

5.) W. D. Herzog, B. B. Goldberg, M. S. Ünlü, R. Singh, and F. P. Dabkowski, "Stimulated Emission from As-grown GaN Hexagons by Selective Area Growth Hydride Vapor Phase Epitaxy," Electronics Letters, Vol. 34, No. 20, October 1998, pp. 1970-1971

4.) W. D. Herzog, R. Singh, T. D. Moustakas, B. B. Goldberg, and M. S. Ünlü, "Photoluminescence Microscopy of InGaN quantum wells," Applied Physics Letters, Vol. 70, No. 11, 17 March 1997, pp. 1333-1335

3.) W. D. Herzog, M. S. Ünlü, B. B. Goldberg, G. H. Vander Rhodes, and C. Harder, "Beam divergence and waist measurements of laser diodes by near-field scanning optical microscopy ," Applied Physics Letters, Vol. 70, No. 6, 10 February 1997, pp. 688-690

2.) B. B. Goldberg, M. S. Ünlü, W. D. Herzog, H. F. Ghaemi, and E. Towe, "Near-field optical studies of semiconductor heterostructures and laser diodes," IEEE Journal of Selected Topics in Quantum Electronics, Vol. 1, No. 4, December 1995, pp. 1073-1081

1.) M. S. Ünlü, B. B. Goldberg, W. D. Herzog, D. Sun, and E. Towe, "Near-field optical beam induced current measurements on heterostructures," Applied Physics Letters, Vol. 67, No. 13, 25 September 1995, pp. 1862-1864

Conference Papers

13.) M. S. Ünlü, W. D. Herzog, and B. B. Goldberg, "Beam steering in narrow-stripe, high-power 980 nm laser diodes ," Proceedings of IEEE Lasers and Electro-Optics Society 2000 Annual Meeting, Vol. 2, 13-16 November 2000, pp. 870-871

12.) W. D. Herzog, T. D. Moustakas, B. B. Goldberg, M. S. Ünlü, R. Singh, and F. P. Dabkowski, "Lasting in Free-Standing GaN Hexagons," Proceedings of CLEO/QELS 1999, May 1999

11.) G. E. Bunea, W. D. Herzog, T. D. Moustakas, M. S. Ünlü, B. B. Goldberg, R. Singh, and F. P. Dabkowski, "Time Resolved Photoluminescence studies of GaN grown by hydride vapor phase epitaxy," Bulletin of APS centennial meeting, 20-26 March 1999

10.) W. D. Herzog, G. E. Bunea, T. D. Moustakas, M. S. Ünlü, B. B. Goldberg, R. Singh, and F. P. Dabkowski, "Observation of longitudinal laser modes in optically pumped GaN hexagons grown by hydride vapor phase epitaxy," Bulletin of APS centennial meeting, 20-26 March 1999

9.) B. B. Goldberg, M. S. Ünlü, G. H. Vander Rhodes, and W. D. Herzog, "Mapping Internal Optical Fields with Near-Field Scanning Optical Microscopy," Bulletin of APS centennial meeting, March 1999

8.) W. D. Herzog, G. Ulu, B. B. Goldberg, G. H. Vander Rhodes, M. S. Ünlü, L. R. Brovelli, and C. Harder, "Theoretical and Experimental Study of Near-Field Beam Properties of High Power Laser Diodes," Proceedings of the International Semiconductor Device Research Symposium (ISDRS), 11-13 December 1997

7.) R. Singh, W. D. Herzog, D. Doppalapudi, M. S. Ünlü, B. B. Goldberg, and T. D. Moustakas, "MBE Growth and Optical Characterization of InGaN/AlGaN Multi-Quantum Wells," Materials Research Society Proceedings Fall 1996, Vol. 449, 2-6 December 1996, pp. 185-190

6.) W. D. Herzog, M. S. Ünlü, B. B. Goldberg, G. H. Vander Rhodes, and C. Harder, "Near-field Analysis of Beam Properties of InGaAs Ridge Lasers," Proceedings of IEEE Lasers and Electro-Optics Society 1996 Annual Meeting, Vol. 1, 18-19 November 1996, pp. 109-110

5.) C. Feng, M. S. Ünlü, B. B. Goldberg, and W. D. Herzog, "Thermal Imaging by Infrared Near-field Microscopy," Proceedings of IEEE Lasers and Electro-Optics Society 1996 Annual Meeting, Vol. 1, November 1996, pp. 249-250

4.) B. B. Goldberg, H. F. Ghaemi, M. S. Ünlü, and W. D. Herzog, "Characterization of Materials and Devices by Near-field Scanning Optical Microscopy," Materials Research Society Proceedings Fall 1995, Vol. 406, 27-30 November 1995, pp. 171-182

3.) M. S. Ünlü, B. B. Goldberg, W. D. Herzog, H. F. Ghaemi, and E. Towe, "Layer Composition and Mode Structure Analysis of Heterojunction Laser Diodes by Near Field Scanning Optical Microscopy," 53rd Annual Device Research Conference 1995, 19-21 June 1995, pp. 148-149

2.) W. D. Herzog, B. B. Goldberg, M. S. Ünlü, H. F. Ghaemi, D. Sun, and E. Towe, "Near Field Optical Beam Induced Current Measurements for the Investigation of Quantum Structures," Proceedings of Quantum Electronics and Lasers Symposium QELS 1995, 22-26 May 1995

1.) M. S. Ünlü, B. B. Goldberg, W. D. Herzog, C. C. Cates, H. F. Ghaemi, D. Sun, and E. Towe, "Characterization of Heterojunction Laser Diodes by Near Field Optical Scanning Microscopy: Layer Composition and Mode Structure Analysis," Proceedings of IEEE Lasers and Electro-Optics Society 1994 Annual Meeting, Vol. 2, 31-Nov. 3 October 1994, pp. 209-210

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