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Bob Zheng
Researcher at Rice University
Publications - 16
Citations - 1821
Bob Zheng is an academic researcher from Rice University. The author has contributed to research in topics: Plasmon & Photodetector. The author has an hindex of 9, co-authored 16 publications receiving 1525 citations. Previous affiliations of Bob Zheng include Lawrence Berkeley National Laboratory.
Papers
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Journal ArticleDOI
Narrowband photodetection in the near-infrared with a plasmon-induced hot electron device.
Ali Sobhani,Mark W. Knight,Yumin Wang,Bob Zheng,Nicholas S. King,Lisa V. Brown,Zheyu Fang,Peter Nordlander,Naomi J. Halas +8 more
TL;DR: A grating-based hot electron device with significantly larger photocurrent responsivity than previously reported antenna-based geometries is reported, and the grating geometry enables more than three times narrower spectral response than observed for nanoantenna-based devices.
Journal ArticleDOI
Distinguishing between plasmon-induced and photoexcited carriers in a device geometry
Bob Zheng,Hangqi Zhao,Alejandro Manjavacas,Michael J. McClain,Peter Nordlander,Naomi J. Halas +5 more
TL;DR: This work uses nanowire-based hot-carrier devices on a wide-bandgap semiconductor to show that plasmonic carrier generation is proportional to internal field-intensity enhancement and occurs independently of bulk absorption and that reducing the barrier height allows for the collection of carriers from plasmons and direct photoexcitation.
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Embedding Plasmonic Nanostructure Diodes Enhances Hot Electron Emission
Mark W. Knight,Yumin Wang,Alexander S. Urban,Ali Sobhani,Bob Zheng,Peter Nordlander,Naomi J. Halas +6 more
TL;DR: It is shown that embedding plasmonic structures into the semiconductor substantially increases hot electron emission, and Responsivities increase by 25× over planar diodes for embedding depths as small as 5 nm.
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Fan-Shaped Gold Nanoantennas above Reflective Substrates for Surface-Enhanced Infrared Absorption (SEIRA)
TL;DR: A new nanoantenna for surface-enhanced infrared absorption (SEIRA) detection, consisting of a fan-shaped Au structure positioned at a well-specified distance above a reflective plane with an intervening silica spacer layer, which exhibits an order of magnitude greater SEIRA sensitivity than previous record-setting designs.
Journal ArticleDOI
Color‐Selective and CMOS‐Compatible Photodetection Based on Aluminum Plasmonics
TL;DR: A color-selective, band-engineered photodetector is demonstrated, which provides a more intelligent way to design imaging sensors by integrating amplifiers and color filters directly into pixels.