Fabry-Perot Phonon Polaritons in Boron Nitride Nanotube Resonators

被引：3

作者：

Phillips, Cassandra ^{[1
]}

Lai, Yi-Fang ^{[1
]}

Walker, Gilbert C. ^{[1
]}

机构：

[1] Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, Canada

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2021年 / 12卷 / 48期

基金：

加拿大自然科学与工程研究理事会;

关键词：

NEAR-FIELD MICROSCOPY;

D O I：

10.1021/acs.jpclett.1c03274

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Phonon polaritons (PhPs) offer extreme confinement of optical fields and strong dispersion in the mid-infrared spectral region. To study the propagation and interference of PhPs in a 1-D system, we employ scattering scanning near-field optical microscopy (s-SNOM), analytical, and computational techniques to describe the resonance behavior observed in boron nitride nanotubes (BNNTs). In BNNTs of a sufficiently small length, the reflected standing waves from both terminals strongly interfere with one another, leading to large constructive enhancement at select wavelengths through the Fabry-Perot interference. This 1-D nanoresonant behavior illustrates methods to increase and localize field strength at positions on a BNNT nanotube.

引用

页码：11683 / 11687

页数：5