Abstract

In order to double the mode density to increase the Raman scattering efficiency, a double cavity structure was introduced to the metal-cladding optical waveguide (MCW) chip. This novel double cavity MCW inherits all the merits of the MCW, such as free space coupling, large detection area, and polarization independence. Furthermore, attributed to the doubled mode density, more incident energy is coupled into the guiding layer and results in a larger enhancement of the Raman scattering. Since the distribution of the electric field is sensitive to the refractive index profile of the two cavities, the proposed structure can be further optimized to concentrate all of the energy to the sample cavity. Experimental verification via four liquid samples of a different refractive index is carried out in support of the above hypothesis.

© 2016 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Horizontal slot waveguide channel for enhanced Raman scattering

Jussi Rahomäki, Tarmo Nuutinen, Lasse Karvonen, Seppo Honkanen, and Pasi Vahimaa
Opt. Express 21(7) 9060-9068 (2013)

Modulation of hot regions in waveguide-based evanescent-field-coupled localized surface plasmons for plasmon-enhanced spectroscopy

Hailong Wang, Yuyang Wang, Yi Wang, Weiqing Xu, and Shuping Xu
Photon. Res. 5(5) 527-535 (2017)

Engineering SERS via absorption control in novel hybrid Ni/Au nanovoids

Robin M. Cole, Sumeet Mahajan, Phil N. Bartlett, and Jeremy J. Baumberg
Opt. Express 17(16) 13298-13308 (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

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 (6)

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