双周期光量子阱中的共振透射谱  

Resonance Transmission Spectra of Dual-Periodical Photonic Quantum-well Structure

作　　者：陈海波[1] 胡素梅[1] 高英俊[2] 

机构地区：[1]茂名学院物理系,广东茂名525000 [2]广西大学物理科学与工程技术学院,南宁530004

出　　处：《半导体光电》2010年第3期412-417,471,共7页Semiconductor Optoelectronics

基　　金：国家自然科学基金项目(50661001);广东省育苗工程项目(201179)

摘　　要：用传输矩阵法研究了一维双周期光量子阱中的共振透射谱,揭示了光子隧穿双周期光量子阱时共振透射谱线的规律。研究发现,该结构拓宽了光子禁带区域,同时禁带中出现了多个共振透射谱,光子晶体的垒区通带频率范围内共振透射谱线的个数主要与光量子阱中垒区的周期数有关,而光子晶体的阱区通带频率范围内共振透射谱线的个数主要与光量子阱中阱区的周期数有关。同时也发现当双周期光量子阱结构的周期数为N时,适当调节垒区和阱区的周期数,可使每个共振透射谱分裂为N-1条,且各分裂谱线互不交叠,这样在有限的禁带区域可以成倍增加光子束缚态,使信道密度增大,能有效地优化光波带宽的使用,有望在光通信超密集波分复用和光学精密测量中获得广泛应用。Resonance transmission spectra in dual-periodical photonic quantum-well structure is studied by using the transfer matrix method,and its regularity is analyzed. It is found that the band gap is widen and several resonance transmission spectra appear in the band gap. The number of resonance transmission spectra in the barrier band frequency is related to the period of the barrier region,and that in the well band frequency is related to the period of the well region. It is also indicated that each transimission spectrum will split into N-1 different frequencies when the periods of barrier and well regions are tuned,where N is the period of the dual-periodical photonic quantum-well structure. These split spectra are un-folded mutually. In this way,photonic confined states can be increased multiplicatively within the forbidden band gap region and the density of signal channel can be increased,optimizing the effective bandwidth. It may be applied widely in the fields of superdense wavelength division multiplexing for optical communication and precise optical measurements.

关 键 词：双周期光量子阱 谱线分裂 紧束缚理论 

分 类 号：O431[机械工程—光学工程]