Incoherent backscattering of random medium

Abstract

Abstract:

Two kinds of scatterings are discussed and the corresponding distribution functions are deduced . The spatial distribution of incoherent backscattering and reflectivity are deduced by simulating the process of stochastic photon movement in random medium using the Monte Carlo method. The results show that different scattering have different reflectivity and spatial distribution of incoherent backscatter. As the angle of incidence increasing, the reflectivity of incoherent backscattering increases. Reflectivity of incoherent backscattering decreases as the absorption coefficient of random medium increasing. By measuring the reflectivity of incoherent backscattering, we can get first the absorption coefficient and then the probability that photon is absorbed by particle each time scattering. Reflectivity of incoherent backscattering decreases as the mean free path of photon increasing .The mean free path can be gotten by measuring the reflectivity of incoherent backscattering , it is easier than testing coherent backscattering to get the mean free path. Lastly, the effect of backscattering on random laser is discussed.

Key words: laser physics, incoherent backscattering, Monte Carlo method, random medium

CLC Number:

O469

FU Fang-zheng , LI Ming. Incoherent backscattering of random medium[J]. J4, 2010, 27(6): 693-699.

References

[1]Letokhov V S. Generation of light by scattering medium with negative resonance absorption
[J] .Sov.Phys.JEPT，1968，26:835.

[2] Lawandy N M , Selschandran R M , Lgomes A S , et al . Laser action in strongly scattering media
[J ] . Nature , 1994 , 388 (3) : 436-438.

[3] Wiersma D S，Lagendijk A. Light diffusion with gain and random lasers.Phys.Rev.E1996，54:4256.

[4]Cao H , Zhao Y G, Ho S T , et al . Random laser action in semiconductor powder
[J ] . Phys Rev L ett , 1999 , 82 (11) : 2278-2282.

[5] Cao H , Zhao Y G. Ultraviolet lasing in resonators formed by scattering in semiconductor polycrystalline films
[J]. Applied Physics Letters ,1998,73:3656-3658.

[6]Strangi G, Ferjani S, Barna V, DeLuca A,Versace C,Scaramuzza N,and Bartolino R.Random lasing and weak localization of light in dye-doped nomadic liquid crystals
[J].Opt. Expr., 2006，14(17):7737-7744.

[7]Anderson P W, Absence of Diffusion in Certain Random Lattices
[J], Physical Review, 1958, 109:1492-1505.

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

[9] Fu Fangzheng，Li Ming. Calculating the threshold of random laser by using Monte Carlo method
[J],Acta Physica Sinica(物理学报),2009,58(9):6258-6263(in Chinese)

[10] Fu Fangzheng, Li Ming.Spatial distribution of output laser in random laser
[J],Chinese J. Quantum Electronics(量子电子学报),2009,26(5):543-547(in Chinese)

[11]Niginov M A, Bahoura M, Noginova N E, et al. stimulated emission in scattering and composite dielectric media(random lasers): effect of particle size
[C]. SPIE, 2003, 5218: 124~129

[12] Wolf P E and Maret G, Weak Localization and Coherent Backscattering of Photons in Disordered Media
[j],Phys.Rev.Lett.,1985,55,2696-2699

[13] van der Mark M B, van Albada M P and Lagendijk A, Light scattering in strongly scattering and weak localization
[J]. Phys.Rev.B,1988,37,3575-3592.

[1]	WU Anhua, , ZHAO Xiangyang , , SHANG Jiamin, , SHEN Hui , SU Liangbi , . Terahertz optical modulation research of rare-earth ferrite crystals [J]. Chinese Journal of Quantum Electronics, 2023, 40(3): 293-300.
[2]	HONG Huihui, Cho-Tung Yip. Double resonance up-conversion fluorescence enhancement of tungsten disulfide films [J]. Chinese Journal of Quantum Electronics, 2022, 39(4): 605-612.
[3]	FENG Liqiang. Effect of resonance ionization on harmonic intensity of atom and molecule systems [J]. Chinese Journal of Quantum Electronics, 2021, 38(4): 529-538.
[4]	ZHANG Yiwen, LIU Hang, †, FENG Liqiang. The effect of chirp-delay regulation on diatomic molecular harmonic generation [J]. Chinese Journal of Quantum Electronics, 2020, 37(3): 314-320.
[5]	LIU Hang, FENG Liqiang. Chirp waveform control for producing water window spectral continuum and attosecond pulse [J]. Chinese Journal of Quantum Electronics, 2020, 37(2): 150-156.
[6]	LI Yi, FENG Liqiang. Improvement of harmonic cutoff and intensity by using chirped-UV combined field [J]. Chinese Journal of Quantum Electronics, 2019, 36(6): 738-744.
[7]	. Photoelectron emission characteristics of photocathode by Monte Carlo method [J]. J4, 2018, 35(5): 539-543.
[8]	FENG Liqiang. Characteristics of high-order harmonic emission from He+ in bowtie-shaped metal nanostructure [J]. J4, 2018, 35(4): 479-485.
[9]	LI Ningxin, QIN Chaochao, YU Kexin. Division-of-amplitude laser polarization dynamic detection based on Labview [J]. J4, 2018, 35(4): 408-413.
[10]	. Numerical simulation of rubidium atom dipole blockade properties [J]. J4, 2017, 34(3): 357-362.
[11]	. Exact solutions for the (2+1)-Dimensional ZK-MEW equation by using modified simple equation method [J]. J4, 2016, 33(3): 287-291.
[12]	Yu Li, Cheng Linghao, Chen Zhenqiang, Liang Yizhi，Jin Long, Guan Bai-Ou . Longitudinal Spatial Response to Magnetic Field for a Faraday-rotation based Dual-Polarization Fiber Laser sensor [J]. J4, 2015, 32(4): 486-491.
[13]	SUN Li, HAN Qi, ZHAO Chong-yi, HUANG Zhao-cong, ZHAI Ya， XU Yong-bing. Local magnetism in permalloy patterns by focused magneto-optic Kerr effect [J]. J4, 2015, 32(4): 492-497.
[14]	YANG Yiting, QIAO Haoxue. Single short pulse generated by hydrogen atom exposed to the combined field of two laser pulses with similar frequency [J]. J4, 2013, 30(4): 405-410.
[15]	He Zhihong，Chen Changshui，Liu Songhao，Zhang Huiyun，Zhang Yuping，Luo Xizhang. Analysis of pump threshold for producing terahertz laser radiation in continuous laser pumping heavy water gas molecules [J]. J4, 2013, 30(4): 411-417.