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提出了5类实现Si基激光器的增益介质材料,即具有强三维量子限制效应的纳米晶Si(nc-Si)薄膜,掺稀土发光中心Er的Si基纳米材料,具有预期人工改性的高纯体单晶Si,基于子带跃迁的SiGe/Si量子级联结构,以及具有受激Raman散射特性的SOI(silicon on insulator)光波导结构．评述了这些材料在近3～5年中在高效率光致发光(PL)、电致发光(EL)、光增益和受激光发射特性方面所取得的重要进展,并简要讨论了今后发展中存在的一些问题．
Five kinds of gain medium materials for realizing Si-based lasers are proposed: nanocrystalline Si (nc-Si) thin films with strong three-dimensional quantum confinement effect, Si-based nanomaterials doped with rare earth luminescent centers Er, Bulk single crystal Si, SiGe / Si quantum cascade based on subband transitions, and SOI (silicon on insulator) optical waveguide structures with stimulated Raman scattering properties. The progress of these materials in high-efficiency photoluminescence (PL), electroluminescence (EL), optical gain and laser emission characteristics was reviewed in the last 3-5 years, and the shortcomings of these materials in future development were briefly discussed Some questions.