Fano U. Effects of configuration interaction on intensities and phase shifts [J]. Phys. Rev., 1961, 124(6):1866-1878.[2] Knight P L, Lauder M A, Dalton B J. Laser-induced continuum structure [J]. Phys. Rep., 1990, 190(1):1-61.[3] Whitley R M, Stroud C R. Double optical resonance [J]. Phys. Rev. A, 1976, 14(4):1498-1513.[4] Gray H R, Whitley R M, Stroud C R. Coherent trapping of atomic populations [J]. Opt. Lett., 1978, 3(6):218-220.[5] Field J E, Hahn K H, Harris S E. Observation of electromagnetically induced transparency in collisionally broadened lead vapor [J]. Phys. Rev. Lett., 1991, 67(22):3062-3065.[6] Gao Jinyue, Guo Chuan, Guo Xiuzheng, et al. Observation of light amplification without population inversion in sodium [J]. Opt. Commun., 1992, 93(5-6):323-327.[7] Harris S E. Lasers without inversion: Interference of lifetime-broadened resonances [J]. Phys. Rev. Lett., 1989, 62(9):1033-1036.[8] Scully M O. Enhancement of the index of refraction via quantum coherence [J]. Phys. Rev. Lett., 1991, 67(14):1855-1858.[9] Zhu Shiyao, Scully M O. Spectral line elimination and spontaneous emission cancellation via quantum interference [J]. Phys. Rev. Lett., 1996, 76(3):388-391.[10] Zhu Shiyao, Narducci L M, Scully M O. Quantum-mechanical interference effects in the spontaneous-emission spectrum of a driven atom [J]. Phys. Rev. A, 1995, 52(6):4791-4802.[11] Zhou Peng, Swain S. Ultranarrow spectral lines via quantum interference [J]. Phys. Rev. Lett., 1996, 77(19):3995-3998[12] Zhou Peng, Swain S. Quantum interference in probe absorption: Narrow resonances, transparency, and gain without population inversion [J]. Phys. Rev. Lett., 1997, 78(5):832-835.[13] Keitel C H. Narrowing spontaneous emission without intensity reduction [J]. Phys. Rev. Lett., 1999, 83(7): 1307-1310.[14] Kosachiov D V, Matisov B G, Rozhdestvensky Y V. Coherent phenomena in multilevel systems with closed interaction contour [J]. J. Phys. B: At. Mol. Opt. Phys., 1992, 25(11):2473-2488.[15] Li Gaoxiang, Peng Jinsheng. Effects of the relative phase of lasers on ionization in a generalized laser-induced continuum structure system [J]. Phys. Lett. A, 1996, 218(1-2):49-57.[16] Unanyan R G, Yatsenko L P, Bergmann K, et al. Laser-induced adiabatic atomic reorientation with control of diabatic losses [J]. Opt. Commun., 1997, 139(1-3):48-54.[17] Paspalakis E, Knight P L. Phase control of spontaneous emission [J]. Phys. Rev. Lett., 1998, 81(2):293-296.[18] Kosachiov D, Matisov B, Rozhdestvensky Y. Phase-sensitive laser cooling of double- atoms [J]. Europhys. Lett., 1993, 22(1):11-16.[19] Shahriar M S, Hemmer P R. Direct excitation of microwave-spin dressed states using a laser-excited resonance Raman interaction [J]. Phys. Rev. Lett., 1990, 65(15):1865-1868.[20] Maichen W, Gaggl R, Korsunsky E, et al. Observation of phase-dependent coherent population trapping in optically closed atomic systems [J]. Europhys. Lett., 1995, 31(4):189-194.[21] Georgiades N P, Polzik E S, Kimble H J. Frequency metrology by use of quantum interference [J]. Opt. Lett., 1996, 21(20):1688-1690.[22] Hemmer P R, Cheng K Z, Kierstead J, et al. Time-domain optical data storage by use of Raman coherent population trapping [J]. Opt. Lett., 1994, 19(4):296-298.[23] Hemmer P R, Katz D P, Donoghue J, et al. Efficient low-intensity optical phase conjugation based on coherent population trapping in sodium [J]. Opt. Lett., 1995, 20(9):982-984.[24] Pellizzari T, Ritsch H. Proposal for a high-density dark optical trap [J]. Europhys. Lett., 1995, 31(3):133-138.[25] Harris S E. Lasers without inversion: Interference of lifetime-broadened resonances [J]. Phys. Rev. Lett., 1989, 62(9):1033-1036.[26] Nottelmann A, Peters C, Lange W. Inversionless amplification of picosecond pulses due to Zeeman coherence [J]. Phys. Rev. Lett., 1993, 70(12):1783-1786.[27] Zhu Shiyao, Wang Dezhong, Gao Jinyue. Nonlinear theory of noninversion lasers of an open three-level system [J]. Phys. Rev. A, 1997, 55(2):1339-1346.[28] Zibrov A S, Lukin M D, Nikonov D E, et al. Experimental demonstration of laser oscillation without population inversion via quantum interference in Rb [J]. Phys. Rev. Lett., 1995, 75(8):1499-1502.[29] Scully M O, Zhu Shiyao. Ultra-large index of refraction via quantum interference [J]. Opt. Commun., 1992, 87(3):134-138.[30] Fleischhauer M, Keitel C H, Scully M O, et al. Resonantly enhanced refractive index without absorption via atomic coherence [J]. Phys. Rev. A, 1992, 46(3):1468-1487.[31] Zhu Yifu. Light amplification mechanisms in a coherently coupled atomic system [J]. Phys. Rev. A, 1997, 55(6):4568-4575.