Three-dimensional nanometer-scale optical cavities of indefinite medium

Jie Yao, Xiaodong Yang, Xiaobo Yin, Guy Bartal, Xiang Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

Miniaturization of optical cavities has numerous advantages for enhancing light - matter interaction in quantum optical devices, low-threshold lasers with minimal power consumption, and efficient integration of optoelectronic devices at large scale. However, the realization of a truly nanometer-scale optical cavity is hindered by the diffraction limit of the nature materials. In addition, the scaling of the photon life time with the cavity size significantly reduces the quality factor of small cavities. Here we theoretically present an approach to achieve ultrasmall optical cavities using indefinite medium with hyperbolic dispersion, which allows propagation of electromagnetic waves with wave vectors much larger than those in vacuum enabling extremely small 3D cavity down to (λ/20) 3. These cavities exhibit size-independent resonance frequencies and anomalous scaling of quality factors in contrast to the conventional cavities, resulting in nanocavities with both high Q/V m ratio and broad bandwidth.

Original languageEnglish
Pages (from-to)11327-11331
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume108
Issue number28
DOIs
StatePublished - 12 Jul 2011
Externally publishedYes

Keywords

  • Metamaterials
  • Nanophotonics
  • Nanowires
  • Plasmonics

All Science Journal Classification (ASJC) codes

  • General

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