光子学报
光子學報
광자학보
ACTA PHOTONICA SINICA
2009年
6期
1432-1437
,共6页
蒋立勇%郑改革%董秋云%李相银
蔣立勇%鄭改革%董鞦雲%李相銀
장립용%정개혁%동추운%리상은
全能反射器%准周期%一维光子晶体%传输矩阵法%遗传算法
全能反射器%準週期%一維光子晶體%傳輸矩陣法%遺傳算法
전능반사기%준주기%일유광자정체%전수구진법%유전산법
Omnidirectional reflectors%Quasi-periodic%One-dimension photonic crystal%Transmission matrix method%Genetic algorithm
介绍了遗传算法在设计宽频带全能反射器中的应用.设计的关键是通过遗传算法寻找到不同一维准周期光子晶体间的最佳组合方式以及光学厚度以便形成一个光子晶体异质结.利用传输矩阵法分析了一维准周期系统中的电磁传输特性.计算结果表明,准周期光子晶体的全方向反射带宽受晶胞单元以及周期数的影响.根据这些规律,用遗传算法成功地优化了光子晶体异质结的结构并得到两种适用于可见光波段的高性能全能反射器.例如结构为(HLLHL)13(HL)13( LHL)15[注:nL=1.46,nH=2.6,dL=0.218λ0/nL且dH=0.201λ0/nH]的反射器在可见光波段内的全方向反射带宽达到了88.42% (446 nm~779 nm).
介紹瞭遺傳算法在設計寬頻帶全能反射器中的應用.設計的關鍵是通過遺傳算法尋找到不同一維準週期光子晶體間的最佳組閤方式以及光學厚度以便形成一箇光子晶體異質結.利用傳輸矩陣法分析瞭一維準週期繫統中的電磁傳輸特性.計算結果錶明,準週期光子晶體的全方嚮反射帶寬受晶胞單元以及週期數的影響.根據這些規律,用遺傳算法成功地優化瞭光子晶體異質結的結構併得到兩種適用于可見光波段的高性能全能反射器.例如結構為(HLLHL)13(HL)13( LHL)15[註:nL=1.46,nH=2.6,dL=0.218λ0/nL且dH=0.201λ0/nH]的反射器在可見光波段內的全方嚮反射帶寬達到瞭88.42% (446 nm~779 nm).
개소료유전산법재설계관빈대전능반사기중적응용.설계적관건시통과유전산법심조도불동일유준주기광자정체간적최가조합방식이급광학후도이편형성일개광자정체이질결.이용전수구진법분석료일유준주기계통중적전자전수특성.계산결과표명,준주기광자정체적전방향반사대관수정포단원이급주기수적영향.근거저사규률,용유전산법성공지우화료광자정체이질결적결구병득도량충괄용우가견광파단적고성능전능반사기.례여결구위(HLLHL)13(HL)13( LHL)15[주:nL=1.46,nH=2.6,dL=0.218λ0/nL차dH=0.201λ0/nH]적반사기재가견광파단내적전방향반사대관체도료88.42% (446 nm~779 nm).
A novel application of genetic algorithm (GA) in designing broad omnidirectional reflectors was introduced.The key is to search the best combination style and thickness ratios of different one-dimension (1D) quasi-periodic (QP) photonic crystals (PCs) to form a photonic heterostructure.Using the transmission matrix method (TMM),the transmission properties of electromagnetic wave in 1D QP systems were investigated.Numerical results show that the omnidirectional reflection (ODR) band of 1D QP PCs is effected by the unit cell and period number.Based on these rules,the best combination schemes for heterostructures was found out and two perfect omnidirectional reflectors for application in visible region were obtained.For instance,a high reflector described as (HLLHL)13(HL)13( LHL)15,where nL=1.46,nH=2.6,dL=0.218λ0/nL,and dH=0.201λ0/nH,is achieved to provide ODR bandwidth of 88.42% (446 nm~779 nm) in visible region.