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Electrically tunable extraordinary optical transmission gratings
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color) Tunable midinfrared extraordinary transmission device. (a) Optical micrograph of tunable EOT device with labeled source contact , drain contact , and grating. (b) Scanning electron micrograph of transmission grating designed for transmission at . (c) Schematic of tunable EOT device showing current path through -doped GaAs epilayer, source and drain contacts, and transmission grating (not to scale).

Image of FIG. 2.
FIG. 2.

(Color) Transmission spectra showing peak shift with current. Normalized transmission spectra for tunable surface plasmon device as a function of source-drain current. A clear redshift can be seen as the current is increased from . The maximum shift achieved was .

Image of FIG. 3.
FIG. 3.

(Color) Device surface temperature derived from photoluminescence spectra (inset) as a function of current. For a fixed current, photoluminescence was used to relate the position of the GaAs band edge to the device temperature. The main plot shows the resulting temperature calibration obtained using this method.

Image of FIG. 4.
FIG. 4.

(Color) Calculated and experimental redshift of tunable SP grating devices as a function of temperature. (a) The calculated magnitude of the spectral shift as a function of both doping and temperature. As the doping is increased, less of a redshift is expected. (b) The calculated (black dashed) and experimental (red solid) redshifts. The calculated curve in (b) also corresponds to the black dashed line in (a) where the doping is low enough to have a negligible effect.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electrically tunable extraordinary optical transmission gratings