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Halas, Naomi J. Nordlander, Peter J. Kelly, Kevin F. Sobhanikhakestar, Ali 2014-10-10T21:32:28Z 2014-10-10T21:32:28Z 2014-05 2014-04-21 May 2014 2014-10-10T21:32:29Z Sobhanikhakestar, Ali. "Narrowband Photodetection in the Short-wavelength Infrared with a Plasmon-induced Hot Electron Device." (2014) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/77521">https://hdl.handle.net/1911/77521</a>. https://hdl.handle.net/1911/77521 In gratings, incident light can couple strongly to plasmons propagating through periodically spaced slits in a metal film, resulting in a strong, resonant absorption whose frequency is determined by the nanostructure periodicity. When a grating is patterned on a silicon substrate, the absorption response can be combined with plasmon-induced hot electron photocurrent generation. This yields a photodetector with a strongly resonant, narrowband photocurrent response in the infrared, limited at low frequencies by the Schottky barrier, not the bandgap of silicon. Here we report a grating-based hot electron device with significantly larger photocurrent responsivity than previously reported antenna-based geometries. The grating geometry also enables more than three times narrower spectral response than observed for nanoantenna-based devices. This approach opens up the possibility of plasmonic sensors with direct electrical readout, such as an on-chip surface plasmon resonance detector driven at a single wavelength. application/pdf eng Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder. Plasmons Hot electron Infrared Schottky Narrowband Extraordinary optical transmission Narrowband Photodetection in the Short-wavelength Infrared with a Plasmon-induced Hot Electron Device Thesis Text Electrical and Computer Engineering Engineering Rice University Masters Master of Science open.access