Journal
OPTICS EXPRESS
Volume 21, Issue 22, Pages 27326-27337Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.027326
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Funding
- SPIE Optics and Photonics Education Scholarship
- Otto Monsteds foundation
- Thomas B. Thriges foundation
- Marie Curie Outgoing International Fellowship [329346]
- Danish Research Council for Technology and Production Sciences via the THz COW project
- ARO [57981-PH (W911NF-11-1-0359)]
- NSF MRSEC [DMR-1120923]
- NSF PREM [DRM-0611430]
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We propose several planar layouts of ultra-compact plasmonic modulators that utilize alternative plasmonic materials such as transparent conducting oxides and titanium nitride. The modulation is achieved by tuning the carrier concentration in a transparent conducting oxide layer into and out of the plasmon resonance with an applied electric field. The resonance significantly increases the absorption coefficient of the modulator, which enables larger modulation depth. We show that an extinction ratio of 46 dB/mu m can be achieved, allowing for a 3-dB modulation depth in much less than one micron at the telecommunication wavelength. Our multilayer structures can be integrated with existing plasmonic and photonic waveguides as well as novel semiconductor-based hybrid photonic/electronic circuits. (C) 2013 Optical Society of America
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