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With the present interest in metamaterial, gain medium shows promise for complex system due to their amplification effect and wide potential application area. In this paper we present a model that simulates lasing in gain medium by using a model of four-energy level atomic system based on the finite-difference time-domain method.Meanwhile we propose a new pump mechanism, i.e., Gaussian Pump. It is found that results of the spectra, lasing threshold and population dynamics of the new pump mechanism are in good agreement with theoretical results. The results can also provide reference for caculating more complex metamaterial system.
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Keywords:
- four-energy level /
- finite-difference time-domain /
- gain media /
- laser
[1] Siegman A E 1986 Laser (California: Mill Valley)
[2] Sargent III M, Scully M O, Lamb W E 1974 Laser Physics (Mass: Addison-Wesly Reading)
[3] Yariv A 1997 Optical Electronics in Morden Communications (New York: Oxford Univ Press)
[4] Einstein A 1917 Phys. Z. 18 121
[5] Lamb W E 1964 Phys. Rev. A 134 1429
[6] Marcuse D 1980 Principles of Quantum Electronics (New York: Academic Press)
[7] Xiao S M, Drachev V P, Kildishev A V, Ni X J, Chettiar U K, Yuan H K, Shalaev V M 2010 Nature 466 735
[8] Fang A, Koschny T, Wegener M, Soukoulis C M 2009 Phys. Rev. B 78 241104
[9] Sivan Y, Xiao S M, Chettiar U K, Kildishev A V, Shalaev V M 2010 Optics Express 17 24060
[10] Fang A, Koschny T, Soukoulis C M 2010 Phys. Rev. B 82 121102
[11] Wuestner S, Pusch A, Tsakmakidis K L, Hamm J M, Hess O 2010 Phys. Rev. Lett. 105 127401
[12] Fang A, Huang Z X, Koschny T, Soukoulis C M 2012 Photonics and Nanostructures-Fundementals and Applications 10 276
[13] Fang A, Huang Z X, Koschny T, Soukoulis C M 2012 Optics Express 19 12688
[14] Hawkins R J, Kallman J S 1994 Opt Quantum Electron 26 207
[15] Hagness S C, Joseph R M, Taflove A 1996 Radio Sci 31 931
[16] Nagra A S, York R A 1998 IEEE Transaction on Antennas and propagation 46 334
[17] Fang A, Koschny T, Soukoulis C M 2010 Journal of Optics 12 024013
[18] Florescu L, Busch K, John S 2002 Optical B 19 2215
[19] Taflove A 1995 Computational Electrodynamics: The Finite Difference Time Domain Method (Norwood, MA: Artech House)
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[1] Siegman A E 1986 Laser (California: Mill Valley)
[2] Sargent III M, Scully M O, Lamb W E 1974 Laser Physics (Mass: Addison-Wesly Reading)
[3] Yariv A 1997 Optical Electronics in Morden Communications (New York: Oxford Univ Press)
[4] Einstein A 1917 Phys. Z. 18 121
[5] Lamb W E 1964 Phys. Rev. A 134 1429
[6] Marcuse D 1980 Principles of Quantum Electronics (New York: Academic Press)
[7] Xiao S M, Drachev V P, Kildishev A V, Ni X J, Chettiar U K, Yuan H K, Shalaev V M 2010 Nature 466 735
[8] Fang A, Koschny T, Wegener M, Soukoulis C M 2009 Phys. Rev. B 78 241104
[9] Sivan Y, Xiao S M, Chettiar U K, Kildishev A V, Shalaev V M 2010 Optics Express 17 24060
[10] Fang A, Koschny T, Soukoulis C M 2010 Phys. Rev. B 82 121102
[11] Wuestner S, Pusch A, Tsakmakidis K L, Hamm J M, Hess O 2010 Phys. Rev. Lett. 105 127401
[12] Fang A, Huang Z X, Koschny T, Soukoulis C M 2012 Photonics and Nanostructures-Fundementals and Applications 10 276
[13] Fang A, Huang Z X, Koschny T, Soukoulis C M 2012 Optics Express 19 12688
[14] Hawkins R J, Kallman J S 1994 Opt Quantum Electron 26 207
[15] Hagness S C, Joseph R M, Taflove A 1996 Radio Sci 31 931
[16] Nagra A S, York R A 1998 IEEE Transaction on Antennas and propagation 46 334
[17] Fang A, Koschny T, Soukoulis C M 2010 Journal of Optics 12 024013
[18] Florescu L, Busch K, John S 2002 Optical B 19 2215
[19] Taflove A 1995 Computational Electrodynamics: The Finite Difference Time Domain Method (Norwood, MA: Artech House)
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