Thin 3D Multiplication Regions in Plasmonically Enhanced Nanopillar Avalanche Detectors
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- 作者：Pradeep Senanayake ; Chung-Hong Hung ; Alan Farrell ; David A. Ramirez ; Joshua Shapiro ; Chi-Kang Li ; Yuh-Renn Wu ; Majeed M. Hayat ; Diana L. Huffaker
- 刊名：Nano Letters
- 出版年：2012
- 出版时间：December 12, 2012
- 年：2012
- 卷：12
- 期：12
- 页码：6448-6452
- 全文大小：295K
- 年卷期：v.12,no.12(December 12, 2012)
- ISSN：1530-6992
文摘
We demonstrate a nanopillar (NP) device structure for implementing plasmonically enhanced avalanche photodetector arrays with thin avalanche volumes ( 310 nm 脳 150 nm 脳 150 nm). A localized 3D electric field due to a core鈥搒hell 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 鈭?2 V are obtained. We show through capacitance鈥搗oltage 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.