American Chemical Society
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We demonstrate a nanopillar (NP) device structure for implementing plasmonically enhanced avalanche photodetector arrays with thin avalanche volumes (∼ 310 nm × 150 nm × 150 nm). A localized 3D electric field due to a core–shell PN junction in a NP acts as a multiplication region, while efficient light absorption takes place via surface plasmon polariton Bloch wave (SPP-BW) modes due to a self-aligned metal nanohole lattice. Avalanche gains of ∼216 at 730 nm at −12 V are obtained. We show through capacitance–voltage characterization, temperature-dependent breakdown measurements, and detailed device modeling that the avalanche region is on the order of the ionization path length, such that dead-space effects become significant. This work presents a clear path toward engineering dead space effects in thin 3D-confined multiplication regions for high performance avalanche detectors for applications in telecommunications, sensing and single photon detection.
Senanayake, Pradeep; Hung, Chung-Hong; Farrell, Alan C.; Ramirez, David A.; Shapiro, Joshua; Li, Chi-Kang; Wu, Yuh-Renn; Hayat, Majeed M.; and Huffaker, Diana L., "Thin 3D Multiplication Regions in Plasmonically Enhanced Nanopillar Avalanche Detectors" (2012). Electrical and Computer Engineering Faculty Research and Publications. 696.
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