Journal
ADVANCED OPTICAL MATERIALS
Volume 6, Issue 22, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.201801025
Keywords
momentum space microscopy; vectorial polarization; whispering gallery modes
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Funding
- DST-Nano mission Grant, Govt. of India [SR/NM/NS-1141/2012(G)]
- Center for Energy Science [SR/NM/TP-13/2016]
- Indo-French Centre for the Promotion of Advanced Research (IFCPAR) [55043]
- DST-SERB grant [SB/OC/OM-10/2014]
- Indian National Science Academy (INSA) grant
- Infosys foundation
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The generation and momentum space distribution of fluorescence emission from individual SiO2 microsphere on dye-coated Au mirror are reported here. The molecular fluorescence emission mediated via whispering gallery modes of the sphere is studied using polarization-resolved optical energy-momentum microspectroscopy. The experiments of this study reveal intensity dependence of split modes of the cavity as a function of in-plane wavevector and emission polarization in the far field. The exotic far-field distribution can be understood by sphere-image sphere model that further reveals the polarization dependence of the split modes. The presented results reveal the potential of metallo-dielectric soft microcavities to engineer molecular emission that can encode spin and orbital angular momentum states and can be further extrapolated to realize dye-loaded active meta-atoms and meta-surfaces.
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