RT Journal Article
SR Electronic
T1 Experimental realization of deep-subwavelength confinement in dielectric optical resonators
JF Science Advances
JO Sci Adv
FD American Association for the Advancement of Science
SP eaat2355
DO 10.1126/sciadv.aat2355
VO 4
IS 8
A1 Hu, Shuren
A1 Khater, Marwan
A1 Salas-Montiel, Rafael
A1 Kratschmer, Ernst
A1 Engelmann, Sebastian
A1 Green, William M. J.
A1 Weiss, Sharon M.
YR 2018
UL http://advances.sciencemag.org/content/4/8/eaat2355.abstract
AB The ability to highly localize light with strong electric field enhancement is critical for enabling higher-efficiency solar cells, light sources, and modulators. While deep-subwavelength modes can be realized with plasmonic resonators, large losses in these metal structures preclude most practical applications. We developed an alternative approach to achieving subwavelength localization of the electric and displacement fields that is not accompanied by inhibitive losses. We experimentally demonstrate a dielectric bowtie photonic crystal structure that supports mode volumes commensurate with plasmonic elements and quality factors that reveal ultralow losses. Our approach opens the door to the extremely strong light-matter interaction regime with, simultaneously incorporating both an ultralow mode volume and an ultrahigh quality factor, that had remained elusive in optical resonators.