本文選題：光子晶體微腔 + 時(shí)域有限差分方法��； 參考：《物理學(xué)報(bào)》2016年13期

【摘要】：光子晶體微腔和量子點(diǎn)的集成是實(shí)現(xiàn)量子信息處理非常具有潛力的平臺(tái)之一,利用微腔和量子點(diǎn)的耦合可以制備糾纏光子對(duì),實(shí)現(xiàn)對(duì)量子態(tài)的操控.因?yàn)楣庾泳w微腔具有品質(zhì)因子高、模場(chǎng)體積小等優(yōu)點(diǎn),可以極大地增強(qiáng)光與物質(zhì)之間的相互作用,從而易于實(shí)現(xiàn)量子態(tài)在不同物理體系之間的轉(zhuǎn)換.通過(guò)單量子點(diǎn)和光子晶體H1微腔的耦合可以產(chǎn)生糾纏光子對(duì),因?yàn)镠1微腔具有簡(jiǎn)并的、模式偏振正交的基態(tài)模式.通常微腔模式的激發(fā)隨著量子點(diǎn)在微腔中的位置變化而改變,本文用時(shí)域有限差分方法研究了偶極子光源的位置及偏振對(duì)激發(fā)光子晶體H1微腔模式的影響.結(jié)果表明:通過(guò)改變偶極子光源位置可以選擇性地激發(fā)H1微腔簡(jiǎn)并模式中的一個(gè);具有某一偏振的偶極子光源只能激發(fā)相應(yīng)偏振的微腔模式;模式激發(fā)強(qiáng)度的大小也是由偶極子光源在微腔中的位置決定的.鑒于目前量子點(diǎn)在微腔中的位置尚不能精確控制,所以微腔模式受激發(fā)光源位置的影響的研究具有重要意義.
[Abstract]:The integration of photonic crystal microcavities and quantum dots is one of the most promising platforms for quantum information processing. Entangled photon pairs can be prepared by using the coupling of microcavities and quantum dots to control quantum states. Because the photonic crystal microcavity has the advantages of high quality factor and small mode field volume, it can greatly enhance the interaction between light and matter, so it is easy to realize the conversion of quantum states between different physical systems. Entangled photon pairs can be generated by the coupling of single quantum dots and photonic crystal H1 microcavities, because H1 microcavities have degenerate, mode polarization orthogonal ground state modes. Generally, the excitation of the microcavity mode changes with the position of quantum dots in the microcavity. In this paper, the influence of the position and polarization of the dipole source on the excited photonic crystal H1 microcavity mode is studied by using the finite-difference time-domain method. The results show that one of the degenerate modes of H1 microcavity can be selectively excited by changing the position of the dipole light source, and that the dipole light source with a certain polarization can only excite the corresponding polarized microcavity mode. The mode excitation intensity is also determined by the position of the dipole light source in the microcavity. In view of the fact that the position of quantum dots in the microcavity can not be accurately controlled at present, it is of great significance to study the effect of the position of the excited light source on the mode of the microcavity.
【作者單位】： 中國(guó)科學(xué)院物理研究所北京凝聚態(tài)物理國(guó)家實(shí)驗(yàn)室;
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(批準(zhǔn)號(hào):2013CB328706,2014CB921003) 國(guó)家自然科學(xué)基金(批準(zhǔn)號(hào):91436101,61275060) 中國(guó)科學(xué)院先導(dǎo)項(xiàng)目(批準(zhǔn)號(hào):XDB07030200);中國(guó)科學(xué)院百人計(jì)劃資助的課題~~
【分類號(hào)】：O734

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