Random Lasers with Coherent Feedback from Polymer Films Based on Rh6G-PVP

Abstract:

The observation of random laser (RL) with coherent feedback in transparent polymer films based on Rh6G-PVP by spin-coating was carried out in the present investigation. Some sharp peaks with FWHM identified to be 2 nm appeared on the fluorescent spectra of polymer films which pumped by Nd:YLF pulse laser (wavelength: 526nm, frequence: 1Hz, pulse duration: 1ns, energy power: 1.2mJ/pulse). The threshold of emission spectra is ~35 and the spectra range from 570 ~ 610 nm. Streak camera was used to record the temporal process of RLs and the pulse duration time was measured to ~400ps. Rh6G-PVP transparent films were a kind of polymer films with numerous nanogaps distributed randomly on the surface of the film. The photons will be multiple scatterred and amplified during the spreading in the polymer film owing to the refractive index difference between nanogaps and polymer films. As the Rh6G-PVP polymer films have characters of convenient fabrication processes, low threshold and low cost, it shows great potential application in photoelectron and laser imaging.

• Periodical: Materials Science Forum (Volume 848)
• Pages: 743-746
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.848.743
• Online since: March 2016
• Authors: Xi Yun Liu, Shen Ye Liu, Tao Yi, Chuan Ke Wang, Ting Shuai Li, Min Xu, Deng Feng Huang
• Keywords: Polymer Films, Random Laser, Redshift, Spin-Coating

References

[1] H. Cao, Lasing in random media, Waves in Random Media, 13 (2003) R1-R39.

DOI: 10.1088/0959-7174/13/3/201

[2] H. Cao, Y.G. Zhao, S.T. Ho, E.W. Seelig, Q.H. Wang, R.P.H. Chang, Random Laser Action in Semiconductor Powder, Physical Review Letters, 82 (1999) 2278-2281.

DOI: 10.1103/physrevlett.82.2278

[3] P. Vaveliuk, A. de Brito Silva, P. de Oliveira, Model for bichromatic laser emission from a laser dye with nanoparticle scatterers, Physical Review A, 68 (2003).

DOI: 10.1103/physreva.68.013805

[4] C. -W. Chen, H. -C. Jau, C. -T. Wang, C. -H. Lee, I.C. Khoo, T. -H. Lin, Random lasing in blue phase liquid crystals, Opt. Express, 20 (2012) 23978-23984.

DOI: 10.1364/oe.20.023978

[5] R. Dhanker, A.N. Brigeman, A.V. Larsen, R.J. Stewart, J.B. Asbury, N.C. Giebink, Random lasing in organo-lead halide perovskite microcrystal networks, Applied Physics Letters, 105 (2014) 151112.

DOI: 10.1063/1.4898703

[6] R.C. Polson, Z.V. Vardeny, Cancerous tissue mapping from random lasing emission spectra, Journal of Optics, 12 (2010).

DOI: 10.1088/2040-8978/12/2/024010

[7] B. Redding, M.A. Choma, H. Cao, Speckle-free laser imaging using random laser illumination (vol 6, pg 355, 2012), Nature Photonics, 6 (2012) 497-497.

DOI: 10.1038/nphoton.2012.90

[8] S.K. Turitsyn, S.A. Babin, A.E. El-Taher, P. Harper, D.V. Churkin, S.I. Kablukov, J.D. Ania-Castañón, V. Karalekas, E.V. Podivilov, Random distributed feedback fibre laser, Nature Photonics, 4 (2010) 231-235.

DOI: 10.1038/nphoton.2010.4

[9] A. Kurian, N.A. George, B. Paul, V.P.N. Nampoori, C.P.G. Vallabhan, Studies on fluorescence efficiency and photodegradation of rhodamine 6G doped PMMA using a dual beam thermal lens technique, Laser Chemistry, 20 (2002) 99-110.

DOI: 10.1080/02786270215153

[10] M. Fikry, M.M. Omar, L.Z. Ismail, Effect of Host Medium on the Fluorescence Emission Intensity of Rhodamine B in Liquid and Solid Phase, Journal of Fluorescence, 19 (2009) 741-746.

DOI: 10.1007/s10895-009-0470-2

[11] D.S. Wiersma, The physics and applications of random lasers, Nat Phys, 4 (2008) 359-367.