[1] [1] N. Tessler, G. Denton, and R. Friend, Nature 382, 695 (1996).

[2] [2] C. Bauer, H. Giessen, B. Schnabel, E. Kley, C. Schmitt, U. Scherf, and R. Mahrt, Adv. Mater. 13, 1161 (2001).

[3] [3] J. Stehr, J. Crewett, F. Schindler, R. Sperling, G. von Plessen, U. Lemmer, J. Lupton, T. Klar, J. Feldmann, and A. Holleitner, Adv. Mater. 15, 1726 (2003).

[4] [4] B. Wenger, N. Tetreault, M. Welland, and R. Friend, Appl. Phys. Lett. 97, 193303 (2010).

[5] [5] T. Zhai, X. Zhang, and Z. Pang, Opt. Express 19, 6487 (2011).

[6] [6] T. Zhai, X. Zhang, Z. Pang, X. Su, H. Liu, S. Feng, and L. Wang, Nano Lett. 11, 4295 (2011).

[7] [7] M. Gaal, C. Gadermaier, H. Plank, E. Moderegger, A. Pogantsch, G. Leising, and E. List, Adv. Mater. 15, 1165 (2003).

[8] [8] D. Pisignano, L. Persano, R. Cingolani, G. Gigli, F. Babudri, G. Farinola, and F. Naso, Appl. Phys. Lett. 84, 1365 (2004).

[9] [9] E. Namdas, M. Tong, P. Ledochowitsch, S. Mednick, J. Yuen, D. Moses, and A. Heeger, Adv. Mater. 21, 799 (2009).

[10] [10] T. Zhai, X. Zhang, Z. Pang, and F. Dou, Adv. Mater. 23, 1860 (2011).

[11] [11] H. Kogelnik and C. Shank, J. Appl. Phys. 43, 2327 (1972).

[12] [12] G. Heliotis, R. Xia, G. Turnbull, P. Andrew, W. Barnes, I. Samuel, and D. Bradley, Adv. Funct. Mater. 14, 91 (2004).

[13] [13] R. Xia, G. Heliotis, P. Stavrinou, and D. Bradley, Appl. Phys. Lett. 87, 031104 (2005).