光电工程
光電工程
광전공정
OPTO-ELECTRONIC ENGINEERING
2012年
2期
94-97
,共4页
张显斌%马丽娟%袁柯%李云锋
張顯斌%馬麗娟%袁柯%李雲鋒
장현빈%마려연%원가%리운봉
太赫兹波%平面波展开法%空气环型光子晶体%透射谱%时域有限差分法
太赫玆波%平麵波展開法%空氣環型光子晶體%透射譜%時域有限差分法
태혁자파%평면파전개법%공기배형광자정체%투사보%시역유한차분법
THz wave%plane wave expansion method%ring-shaped holes photonic crystal%transmission spectrum%finite-difference time-domain method
采用平面波展开法研究了2D三角晶格空气孔型光子晶体的带隙结构和空气环型光子晶体的完全带隙.结果发现空气孔半径R从0.41a到0.49a之间变化时,空气孔型的完全带隙会越大；在同一空气孔半径(R=0.41a～0.47a)下空气环型结构都能得到比空气孔结构更宽的完全带隙,得到最优参数R=0.47a,r=0.133a下的完全带隙为0.169 8 THz,是空气孔结构的1.15倍.使用时域有限差分法研究了空气环型结构的透射谱,根据计算结果设计了(0.719 8～0.865 5)THz波段的滤波器.
採用平麵波展開法研究瞭2D三角晶格空氣孔型光子晶體的帶隙結構和空氣環型光子晶體的完全帶隙.結果髮現空氣孔半徑R從0.41a到0.49a之間變化時,空氣孔型的完全帶隙會越大；在同一空氣孔半徑(R=0.41a～0.47a)下空氣環型結構都能得到比空氣孔結構更寬的完全帶隙,得到最優參數R=0.47a,r=0.133a下的完全帶隙為0.169 8 THz,是空氣孔結構的1.15倍.使用時域有限差分法研究瞭空氣環型結構的透射譜,根據計算結果設計瞭(0.719 8～0.865 5)THz波段的濾波器.
채용평면파전개법연구료2D삼각정격공기공형광자정체적대극결구화공기배형광자정체적완전대극.결과발현공기공반경R종0.41a도0.49a지간변화시,공기공형적완전대극회월대；재동일공기공반경(R=0.41a～0.47a)하공기배형결구도능득도비공기공결구경관적완전대극,득도최우삼수R=0.47a,r=0.133a하적완전대극위0.169 8 THz,시공기공결구적1.15배.사용시역유한차분법연구료공기배형결구적투사보,근거계산결과설계료(0.719 8～0.865 5)THz파단적려파기.
Band gap of 2D triangular lattice photonic crystal with circular air holes and ring-shaped air holes in THz range was studied by using plane wave expansion method (PWM).It was found that complete band gap of circular holes was larger when the holes radius increased from 0.41a to 0.49a.For the same hole radius,ring-shaped holes photonic crystal could get the larger complete band gap than circular holes,and the optimal parameter was 0.169 8 THz when the holes radius of 0.47a,inner radius of 0.133a,was 1.15 times for circular holes structure.Transmission spectrum of ring-shaped holes photonic crystal was studied by fimite-difference time-domain method (FDTD),and we designed the filter in (0.7198 ～0.8655) THz wave.
