摘要
采用数值计算方法,模拟了具有二维光子带隙结构的太赫兹频段谐振腔的谐振模式场分布,计算了这种谐振腔的品质因数,详细分析了光子晶体结构、缺陷腔几何参量对谐振特性的影响·计算得到频率落在光子晶体禁带内的单一、高阶谐振模式,且缺陷腔横向尺寸越大,谐振模式的阶数越高·这种谐振腔具有很高的品质因数,腔体的纵向长度对品质因数的影响较大·
The field-pattern of various resonant modes of THz resonators with two-dimensional photonic band gap structure is simulated by using numerical calculation method. The quality factor （Q-factor） of the resonators is calculated and the affection of the photonic crystal＇s structure and the defect＇s geometrical parameters on the resonance characters are analyzed. The high order modes with their frequencies laying in the photonic band gap is gained. The larger the defect＇s transverse dimension is, the higher the order of the resonance mode becomes. The simulated resonator in this work shows very high Q-factor. Moreover, the Q-factor is sensitively affected by the longitudinal length of the resonator.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2008年第5期944-947,共4页
Acta Photonica Sinica
基金
大功率微波电真空器件技术国防科技重点实验室基金(514400030204JW2401)资助
