Abstract

This Letter proposes a dielectric waveguide with deep-subwavelength mode sizes. Results of both frequency domain and time domain analysis show that the effective mode area is below λ02/400 and can even reach λ02/1000 (λ0 is the wavelength in vacuum). The effective electrical mode area can be comparable to that of a hybrid plasmonic subwavelength confinement waveguide, with reduced optical absorption. In contrast to slot waveguides, which guide light in low-index materials, the proposed structure guides light in high-index materials. Results obtained in this Letter show that the losses are sensitive to the surface roughness on the tens of nanometers scale. The structure can be used to design ring resonators with a quality factor comparable to that of a diffraction-limited dielectric ring resonator with the same standing wave numbers. The property can be applied in nonlinear effect enhancement or laser design with ultralow threshold.

© 2012 Optical Society of America

Full Article  |  PDF Article
Related Articles
Horizontal single and multiple slot waveguides: optical transmission at λ=1550 nm

Rong Sun, Po Dong, Ning-ning Feng, Ching-yin Hong, Jurgen Michel, Michal Lipson, and Lionel Kimerling
Opt. Express 15(26) 17967-17972 (2007)

Slot waveguides with polycrystalline silicon for electrical injection

Kyle Preston and Michal Lipson
Opt. Express 17(3) 1527-1534 (2009)

NanoSi low loss horizontal slot waveguides coupled to high Q ring resonators

Romain Guider, Nicola Daldosso, Alessandro Pitanti, Emmanuel Jordana, Jean-Marc Fedeli, and Lorenzo Pavesi
Opt. Express 17(23) 20762-20770 (2009)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Supplementary Material (2)

» Media 1: MPG (103 KB)     
» Media 2: MPG (200 KB)     

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription