Abstract

A surface-wave sensor based on the resonant transmission characteristics of metal hole arrays is demonstrated in the terahertz (THz) region. Since the frequency of the transmission peak of a metal hole array, which corresponds to the resonant frequency of the surface waves, is particularly sensitive to the refractive index in the vicinity of the metal surface, a very small change in the substances attached to the surface can be detected by monitoring the transmission spectrum. By attaching a layer of substance (thickness t<5μm) much thinner than the wavelength of the THz wave (λTHz=1mm at 0.3THz) to the surface of a metal hole array, we demonstrated that the existence of such a small amount of substance can be detected more easily than without the metal hole array. This demonstration of THz sensing with metal hole arrays indicates the possibility of realizing THz surface-wave sensors for biochemical molecules in the THz region.

© 2006 Optical Society of America

Full Article  |  PDF Article
Related Articles
Effect of a thin dielectric layer on terahertz transmission characteristics for metal hole arrays

Masaki Tanaka, Fumiaki Miyamaru, Masanori Hangyo, Takeshi Tanaka, Masamichi Akazawa, and Eiichi Sano
Opt. Lett. 30(10) 1210-1212 (2005)

Highly sensitive surface plasmon terahertz imaging with planar plasmonic crystals

F. Miyamaru, M. W. Takeda, T. Suzuki, and C. Otani
Opt. Express 15(22) 14804-14809 (2007)

A terahertz plastic wire based evanescent field sensor for high sensitivity liquid detection

Borwen You, Tze-An Liu, Jin-Long Peng, Ci-Ling Pan, and Ja-Yu Lu
Opt. Express 17(23) 20675-20683 (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 (2)

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

Equations (1)

You do not have subscription access to this journal. Equations 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