CAJ | 학술논문

利用液晶热光效应的温度特性，并通过传输矩阵法理论，研究了液晶缺陷一维光子晶体的光传输特性。结果表明，当无液晶缺陷时，在较宽的禁带范围出现一条缺陷模，当在光子晶体中引入液晶缺陷时，禁带边缘通带的透射率大幅下降，同时禁带中增加了一条液晶缺陷模，形成双缺陷模特征，且透射率均为100％；随着液晶材料温度的增大，液晶缺陷模的位置向短波方向移动，而随着液晶层厚度的变化其位置向长波方向移动，但右边空位缺陷模的位置并未受到液晶温度和厚度的影响。液晶材料对光子晶体透射谱的这种调制作用，为设计可调谐光子晶体光学器件提供指导意义。
이용액정열광효응적온도특성，병통과전수구진법이론，연구료액정결함일유광자정체적광전수특성。결과표명，당무액정결함시，재교관적금대범위출현일조결함모，당재광자정체중인입액정결함시，금대변연통대적투사솔대폭하강，동시금대중증가료일조액정결함모，형성쌍결함모특정，차투사솔균위100％；수착액정재료온도적증대，액정결함모적위치향단파방향이동，이수착액정층후도적변화기위치향장파방향이동，단우변공위결함모적위치병미수도액정온도화후도적영향。액정재료대광자정체투사보적저충조제작용，위설계가조해광자정체광학기건제공지도의의。
The transmission characteristics of 1D symmetrical photonic crystal with nematic liquid crystal ( LC) defect is studied by using temperature characteristics of the thermo optic effect of LC and transfer matrix method.The results show that without LC defect in the photonic crystal, the one defect mode with a transmission rate of 100%appears in the relatively wide forbidden band range; while LC defect is introduced in the photonic crystal, the transmission rate of band edge drops sharply and the two defect modes ( the transmission rate is 100%) appear in the band gap at same time.The position of LC defect mode moves to short wavelength with the increased temperature of LC, and it moves to longer wavelength by increasing the thickness of LC, but there is no change to the vacancy defect mode as the temperature or thickness of LC increases.These modulation effects of LC materials on transmission spectrum of photonic crystal can provide positive guidance for the design of tunable photonic crystal optical devices.