Quasiphonon polaritons

被引：11

作者：

Cheng, Lu ^{[1
]}

Zheng, Wei ^{[1
]}

Jia, Lemin ^{[1
]}

Huang, Feng ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Mat, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Peoples R China

来源：

HELIYON | 2020年 / 6卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Condensed matter physics; Electromagnetism; Materials science; Optics; Optical anisotropy; Birefringence; Quasiphonon polaritons; Reststrahlen band; APERIODIC-OSCILLATION EMISSION; LATTICE-VIBRATIONS; DISPERSION; SCATTERING; REFLECTIVITY; REFLECTANCE; DEPENDENCE; CRYSTAL; MODES;

D O I：

10.1016/j.heliyon.2020.e05277

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Mid-infrared reflection spectra of c- and m-plane bulk AlN show a reststrahlen band related to the formation of phonon polaritons. However, it is worth noting that there are additional hump- and spike-shaped peaks in the spectra, which cannot be explained by the phonon-polaritons model applicable to optically isotropic crystals. Here, considering the existence of quasiphonons in wurtzite crystals, we suppose that the extra peaks result from the generation of quasiphonon polaritons (QPPs) induced by the coupling between photon and quasi-transverse optical phonon. On the basis of this point, a QPPs model applicable to optically anisotropic wurtzite crystals is developed, which successfully explains the reststrahlen band of bulk AlN. Besides, on the ground of our model, a series of reststrahlen band of bulk AlN under various configurations is also predicted and presented.

引用

页数：5

共 40 条

[1] FIRST-ORDER RAMAN EFFECT IN WURTZITE-TYPE CRYSTALS [J].