Laser Emission in PMMA Nano-Composite Films

Abstract:

In this article, low-threshold random laser with one mirror and feedback is investigated in PMMA film containing Rhodamine 590 and TiO2 nano-particles. Incoherent and coherent laser emission is observed. Optics microscopy and Scanning Probe Microscopy are used to investigate the film structure and the principle of incoherent and coherent laser is analyzed.

• Periodical: Solid State Phenomena (Volumes 121-123)
• Pages: 1233-1236
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.121-123.1233
• Online since: March 2007
• Authors: Xiao Hong Sun, Xiao Ming Tao, Pu Xue, Jian Guo Deng, Kwan Kai Cheong
• Keywords: Coherent, Dye, Incoherent, Laser, Nanocomposite

References

[1] N. M. Lawandy, R. M. Balachandran, A.S.L. Gomes, and E. Sauvain, Nature 368, 436 (1994).

[2] W. Sha, C. -H. Liu, and R. Alfano, J. Opt. Soc. Amer. B 19, 1922 (1994).

[3] M.A. Noginov, H.J. Caulfield, N.E. Noginova, and P. Venkateswarlu, Opt. Commun 118 430 (1995).

[4] D. Zhang, B. Cheng, J. Yang,Y. Zhang,W. Hu, and Z. Li, Opt. Commun. 118, 462 (1995).

[5] M. Siddique, R.R. Alfano, G.A. Berger, M. Kempe, and A.Z. Genack, Opt. Lett. 21, 450 (1996).

[6] G. van Soest, M. Tomita, and A. Lagendijk, Opt. Lett., 24, 306 (1999).

[7] G. van Soest, F. J. Poelwijk, R. Sprik, and A. Lagendijk, Phys. Rev. Lett. 86, 1522 (2001).

DOI: 10.1103/physrevlett.86.1522

[8] S. John and G. Pang, Phys. Rev. A, 54, 3642 (1996).

[9] D. S. Wiersma and A. Lagendijk, Phys. Rev. Lett. 54, 4256 (1996).

[10] R. M. Balachandran, N. M. Lawandy, and J. A. Moon, Opt. Lett. 22, 319 (1997).

[11] G. A. Berger, M. Kempe, and A. Z. Genack, Phys. Rev. E 56, 6118 (1997). [12] H. Cao, Y. G. Zhao, H. C. Ong, S. T. Ho, J. Y. Dai, J. Y. Wu, and R. P. H. Chang, Appl. Phys. Lett. 73, 3656 (1998).

[13] H. Cao, Y. Zhao, S.T. Ho, E.W. Seelig, Q.H. Wang, and R.P.H. Chang, Phys. Rev. Lett. 82, 2278 (1999).

[14] S. V. Frolov, Z. V. Vardeny, K. Yoshino, A. Zakhidov, and R. H. Baughman, Phys. Rev. B 59, R5284 (1999).

DOI: 10.1103/physrevb.59.r5284

[15] C. Zacharakis, Applied Physics Letters 81, 2511 (2002).

[16] B. Raghavendra Prasad, Hema Ramachandran, Ajay Kumar Sood, C. K. Subramanian, Narendra Kumar, Applied Optics, 36, 7718 (1997).

[17] H. Cao, Physica B, 338, 215. (2003).

[18] H. Cao, J. Y. Xu, S. -H. Chang, and S. T. Ho, Physical Review E 61, 1985 (2000).

[19] R.M. Balachandran, D. P. Pacheco, and N.M. Lawandy, Applied Optics 35, 640 (1996).

[20] Y. Ling, H. Cao, A. L. Burin, M. A. Ratner, X. Liu, and R. P. H. Chang, Physics Review A 64, 063808-1 (2001) -10 0 10 20 30 40 50 60 70 80 90 100 110 120.

1000 2000 3000 4000 5000 6000 7000 8000 9000.

[11] [01] [0] [0] Peak Intensity (a. u. ) Pump Energy Density (mJ/cm.

[2] ) Emission Intensity(a. u. ) Pump Energy Density(mJ/cm.

[2] ).

20 40 60 80 100 120 140 160.

[4] [8] [12] [16] [20] [24] [28] [32] [36] [40] [44] [48] [52] [56] [60] [64] Linewidth(nm) Pump Energy Density(mJ/cm2 ) Figure 1 Peak emission intensity of PMMA film containing Rhodamine 590 and TiO2 particles plotted against pump energy density. The inset is its log-log curve. The lasing threshold is 5mJ/cm 2. Figure 2 Peak line-width of PMMA film containing Rhodamine 590 and TiO2 particles plotted against pump energy density 540 560 580 600 620 640 660 500 1000 1500 2000 2500 3000 3500 4000 4500 b a Emission Intensity (a. u. ) Wavelength (nm) 576 579 582 585 588 591 594 597 600 603 1000 2000 3000 4000 5000 6000 7000 Emission Intensity (a. u. ) Wavelength (nm) Figure 3 Emission spectra of PMMA film doped with Rhodamine 590 and TiO2 particles with a pumping energy density (a) 1. 9mJ/cm 2, (b) 50mJ/cm 2. a is scaled up by a factor of 5. Figure 4 The multimode output above the threshold in PMMA film containing rhodamine 590 and TiO2 nano-particles pumped at 60mJ/cm.

[2] Figure 5 (a) Internal (b) Surface structure photograph of PMMA film doped with Rhodamine 590 and TiO2 particles by using 400 times optics microscopy (c) topography of Scanning Probe Microscopy a b c.