基于光子晶体微腔的InGaAs纳米线的阈值增益特性研究
首发时间:2019-03-28
摘要:本文采用时域有限差分法研究了光子晶体微腔中的In0.53Ga0.47As纳米线的阈值增益特性。研究结果表明,在无光子晶体微腔时,随着纳米线直径减小,对光场的限制能力减弱,阈值增益提高,当半径小于140nm时无法激射。通过将InGaAs纳米线置于设计的光子晶体微腔中,由于光子晶体微腔对模式较强的限制作用,纳米线激射的截止半径降至70 nm。本研究工作表明基于光子晶体微腔的纳米线在超小型、高集成度纳米线激光器中有重要应用前景。
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Study of Threshold Characteristics of InGaAs Nanowires Based on Photonic Crystal Microcavity
Abstract:In this paper, the threshold gain characteristics of InGaAs nanowires in photonic crystal microcavities are studied by finite difference time domain method. The results show that in the absence of photonic crystal microcavities, as the diameter of the nanowires decreases, the ability to limit the light field is weakened, the threshold gain is increased, and the radiance is impossible when the radius is less than 140 nm. By placing the InGaAs nanowires in the designed photonic crystal microcavity, the cut-off radius of the nanowire lasing is reduced to 70 nm due to the strong mode limitation of the photonic crystal microcavity. This work shows that nanowires based on photonic crystal microcavities have important application prospects in ultra-small, highly integrated nanowire lasers.
Keywords: Nanowire Threshold characteristics Photonic crystal
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基于光子晶体微腔的InGaAs纳米线的阈值增益特性研究
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