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Enhancement of Radiative and Nonradiative Emission in Random Lasing Plasmonic Nanofibers
Annalen Der Physik ( IF 2.2 ) Pub Date : 2021-03-09 , DOI: 10.1002/andp.202000558 Mahi R Singh 1 , Grant Brassem 1 , Sergey Yastrebov 2
Annalen Der Physik ( IF 2.2 ) Pub Date : 2021-03-09 , DOI: 10.1002/andp.202000558 Mahi R Singh 1 , Grant Brassem 1 , Sergey Yastrebov 2
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A theory of light–matter interaction in plasmonic nanofibers is developed. When probe light propagates inside the nanofiber, it induces surface plasmon polariton (SPPs) and electric dipoles in metallic nanoparticles. The dipoles interact with each other via dipole–dipole interaction (DDI). The energy of photonic bound states in the presence of the SPP and DDI fields are calculated. It has been demonstrated that the number of bound states can be controlled by the strength of SPP and DDI couplings. The spontaneous decay rate for the quantum emitters have been calculated and it is found that decay rate is enhanced when the exciton energy is in resonance with the bound photon energy. Further, it is predicted that the spontaneous decay rate also enhances when the exciton and SPP energies are in resonance. Finally, the photoluminescence in nanofiber is calculated using the density matrix method. The authors' theory is compared with experiments and found a good agreement between theory and experiments. It has been demonstrated that the quenching of the photoluminescence intensity increases as the concentration of the MNPs increases. The findings of the paper can be used to fabricate random lasers and also for inventing new types of nanosensors and nanoswitches.
中文翻译：
随机激光等离子体纳米纤维中辐射和非辐射发射的增强。
提出了等离子体纳米纤维中光-物质相互作用的理论。当探针光在纳米纤维内部传播时，它会在金属纳米粒子中引起表面等离激元极化（SPP）和电偶极子。偶极子之间通过偶极子-偶极子相互作用（DDI）相互作用。计算存在SPP和DDI场时的光子束缚态能量。已经证明，结合态的数目可以通过SPP和DDI偶联的强度来控制。计算出了量子发射器的自发衰减率，发现当激子能量与束缚光子能量共振时，衰减率会提高。此外，据预测，当激子和SPP能量共振时，自发衰减率也会提高。最后，纳米纤维的光致发光是用密度矩阵法计算的。将作者的理论与实验进行比较，发现理论与实验之间有很好的一致性。已经证明，随着MNP的浓度增加，光致发光强度的猝灭增加。该论文的发现可用于制造随机激光器，也可用于发明新型的纳米传感器和纳米开关。
更新日期：2021-04-08
中文翻译：
随机激光等离子体纳米纤维中辐射和非辐射发射的增强。
提出了等离子体纳米纤维中光-物质相互作用的理论。当探针光在纳米纤维内部传播时，它会在金属纳米粒子中引起表面等离激元极化（SPP）和电偶极子。偶极子之间通过偶极子-偶极子相互作用（DDI）相互作用。计算存在SPP和DDI场时的光子束缚态能量。已经证明，结合态的数目可以通过SPP和DDI偶联的强度来控制。计算出了量子发射器的自发衰减率，发现当激子能量与束缚光子能量共振时，衰减率会提高。此外，据预测，当激子和SPP能量共振时，自发衰减率也会提高。最后，纳米纤维的光致发光是用密度矩阵法计算的。将作者的理论与实验进行比较，发现理论与实验之间有很好的一致性。已经证明，随着MNP的浓度增加，光致发光强度的猝灭增加。该论文的发现可用于制造随机激光器，也可用于发明新型的纳米传感器和纳米开关。
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