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Keywords:

  • Optical Microcavities;
  • Porous Silicon;
  • Bar Code;
  • Microsphere
Thumbnail image of graphical abstract

A new type of porous silicon based microcavity has been developed. The intrinsic photoluminiscence emission is strongly coupled to the whispering gallery modes of the microcavity resulting in a unique photonic fingerprint of each particle. It may be envisaged as a photonic bar code like luminescent profile associated to each single particle.