Circuit-tunable sub-wavelength THz resonators: hybridizing optical cavities and loop antennas.
Opt Express
; 22(18): 21302-12, 2014 Sep 08.
Article
em En
| MEDLINE
| ID: mdl-25321509
ABSTRACT
We demonstrate subwavelength electromagnetic resonators operating in the THz spectral range, whose spectral properties and spatial/angular patterns can be engineered in a similar way to an electronic circuit. We discuss the device concept, and we experimentally study the tuning of the resonant frequency as a function of variable capacitances and inductances. We then elucidate the optical coupling properties. The radiation pattern, obtained by angle-resolved reflectance, reveals that the system mainly couples to the outside world via a magnetic dipolar interaction.
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MEDLINE
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En
Ano de publicação:
2014
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Article