Local Chirality of Optical Resonances in Ultrasmall Resonators

被引：51

作者：

Redding, Brandon ^{[1
]}

Ge, Li ^{[2
]}

Song, Qinghai ^{[3
]}

Wiersig, Jan ^{[4
]}

Solomon, Glenn S. ^{[5
,6
]}

Cao, Hui ^{[1
]}

机构：

[1] Yale Univ, Dept Appl Phys, New Haven, CT 06520 USA

[2] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

[3] Harbin Inst Technol, Shenzhen Grad Sch, Dept Elect & Informat Engn, Shenzhen 518055, Peoples R China

[4] Univ Magdeburg, Inst Theoret Phys, D-39016 Magdeburg, Germany

[5] Natl Inst Stand & Technol, Joint Quantum Inst, Gaithersburg, MD 20899 USA

[6] Univ Maryland, Gaithersburg, MD 20899 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 25期

基金：

美国国家科学基金会;

关键词：

SHAPED MICRODISK RESONATORS; ASYMMETRIC MODAL DISTRIBUTIONS; RECIPROCAL TRANSMISSIONS; DIRECTIONAL EMISSION; LASERS; CAVITIES; MICROLASERS;

D O I：

10.1103/PhysRevLett.108.253902

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In wavelength-scale cavities with chiral-symmetric geometry, wave optical effects can introduce local chirality, that is, a spatial separation of the clockwise and counterclockwise propagating resonant modes. We show that this local chirality results in unidirectional lasing emission in the far field. In the presence of a waveguide, the local chirality also allows for directional evanescent coupling of the lasing modes, and the output direction can be varied by selecting the coupling position along the cavity boundary. Our results demonstrate that the local chirality of optical resonances can be utilized to control the output directionality and enhance the collection efficiency of emission from ultrasmall resonators.

引用

页数：5

共 33 条

[1] Non-Hamiltonian dynamics in optical microcavities resulting from wave-inspired corrections to geometric optics [J].