Photons confined in hollow microspheres

Artemyev, M. V.; Woggon, U.; Wannemacher, R.
February 2001
Applied Physics Letters;2/19/2001, Vol. 78 Issue 8, p1032
Academic Journal
Incorporation of CdSe quantum dots into a thin (<1 μm) surface shell of polymer microspheres (R∼2-4 μm) is achieved. The room-temperature emission spectra of single, hollow microcavities show several, spectrally well-separated cavity modes in the red-orange spectral range which have been assigned to high-Q whispering gallery modes (WGM) with radial quantum number n=1 and high angular quantum number l. An enhancement of the cavity finesse Q by a factor of about 10 with respect to CdSe-doped bulk polymer microspheres is found. © 2001 American Institute of Physics.


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