Shift of whispering-gallery modes in microspheres by protein adsorption Arnold, S. ; Khoshsima, M. ; Teraoka, I. ; Holler, S. ; Vollmer, F. Abstract Publication: Optics Letters Pub Date: February 2003 DOI: 10.1364/OL.28.000272 Bibcode: 2003OptL...28..272A