New spherical optical cavities with non-degenerated whispering gallery modes

DOI HANDLE 被引用文献1件 参考文献19件

書誌事項

公開日
2017-02-20
資源種別
journal article
DOI
  • 10.1117/12.2251599
公開者
SPIE

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説明

New spherical resonators with internal defects are introduced to show anomalous whispering gallery modes (WGMs). The defect induces a symmetry breaking spherical cavity and splits the WGMs. A couple of defects, a hollow sphere (bubble), and a hollow ring, have been studied. The hollow sphere was fabricated and the splitting of WGM was observed. In this paper, this "non-degenerated WGMs (non-DWGMs) resonance" in a microsphere with hollow defect structure is reviewed based on our research. The resonance of WGMs in a sphere is identified by three integer parameters: the angular mode number, l, azimuthal mode number m, and radial mode number, n. The placement of the defect such as a hollow ring or single bubble is shown to break symmetry and resolve the degeneracy concerning m. This induces a variety of resonant wavelengths of the spherical cavity. A couple of simulations using the eigenmode and transient analyses propose how the placed defects affect the WGM resonance in the spherical cavity. For the sphere with a single bubble defect, the experimentally observed resonances in Nd-doped tellurite glass microsphere with a single bubble are clarified to be due to the splitting of resonance modes, i.e., the existence of "non-DWGMs" in the sphere. The defect bubble plays a role of opening the optically wide gate to introduce excitation light for Nd3+ pumping using non-DWGMs in the sphere efficiently.

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詳細情報 詳細情報について

  • CRID
    1360004235883663360
  • DOI
    10.1117/12.2251599
  • HANDLE
    11589/109930
  • ISSN
    0277786X
  • 資料種別
    journal article
  • データソース種別
    • Crossref
    • KAKEN
    • OpenAIRE
    • IRDB

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