Woo Jun Kim ; O'Brien, J.D., "Optimization of a two-dimensional photonic-crystal waveguide branch by simulated annealing and the finite-element method", Journal of the Optical Society of America B (Optical Physics) 21(2),  289-95 (2004)

M. H. Shih, W. J. Kim, Wan Kuang, J. R. Cao, H. Yukawa, S. J. Choi, J. D. O'Brien, P. D. Dapkus, W. K. Marshall, “Two-Dimensional Photonic Crystal Mach-Zehnder Interferometers”, Applied Physics Letters 84, 460-2 (2003)

Wan Kuang, Cheolwoo Kim, A. Stapleton, Woo Jun Kim, J. D. O'Brien, "Calculated out-of-plane transmission loss for photonic-crystal slab waveguides", Optics Letters 28(19), 1781-3 (2003)

Woo Jun Kim, Wan Kuang, John D. O'Brien, "Dispersion characteristics of photonic crystal coupled resonator optical waveguides", Optics Express 11 (25): 3431-3437 (2003)

J. D. O’Brien, P.-T. Lee, J. R. Cao, W. Kuang, C. Kim, W.-J. Kim, T. Yang, S.-J. Choi, P. D. Dapkus, “Photonic Crystal Lasers,” in Proceedings of SPIE Vol.4942 VCSELs and Optical Interconnects, edited by Hugo Thienpont, Jan Danckaert, (SPIE, Bellingham, WA, 2003) pp.194, (invited)

C. W. Kim, W. J. Kim, A. Stapleton, J. R. Cao, J. D. O’Brien, and P. D. Dapkus, “Quality factors in single-defect photonic-crystal lasers with asymmetric cladding layers”, Journal of Optical Society of America B 19, 1777, (2002)

J. D. O'Brien, J. Cao, W. Kuang, M. H. Shih, W. J. Kim, H. Yukawa, C. Kim, S. Choi, P. D. Dapkus, “Photonic crystal waveguides and emitters,” SPIE Photonic Design, Technology, and Packaging Conference (2003), Perth, Australia, Proceedings of SPIE Vol. #5277 (Invited)

J. D. O'Brien, P.-T. Lee, J.-R. Cao, C. Kim, W. J. Kim, S.-J. Choi, and P. D. Dapkus, “VCSEL-pumped photonic crystal lasers”, Lasers and Electro-Optics, (2002). CLEO 2002 Technical Digest, p. 295 (invited).

J. D. O'Brien, J. R. Cao, P.-T. Lee, T. Yang, C. Kim, W. J. Kim, S.-J. Choi, and P. D. Dapkus, “Photonic crystal lasers”, SPIE’s Photonics Fabrication Europe (2002), Proceedings of SPIE, vol. 4942 (invited).

C. Kim,  W. J. Kim, A. Stapleton,  J. R. Cao, J. O’Brien, “Quality Factors in Single Defect Photonic Crystal Lasers with Asymmetric Cladding Layers” ,  Lasers and Electro-Optics Society, 2001. LEOS 2001. The 14th Annual Meeting of the IEEE , Volume: 2 , pp. 210-211 (2001).

W. J. Kim, J. D. O’Brien, “A Full Vectorial Finite Element Analysis of 2-D Photonic Crystal Slabs”,  Lasers and Electro-Optics Society, 2001. LEOS 2001. The 14th Annual Meeting of the IEEE , Volume: 2 , pp. 208-209 (2001).