Journal
ACS PHOTONICS
Volume 4, Issue 3, Pages 695-702Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.7b00065
Keywords
nanowire/nanopillar; nanowire laser; LEDs; MOCVD growth; quantum-well; InP; III-V; photonic integrated circuit; silicon photonics
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Funding
- NSF [1335609, ECCS-0939514]
- Directorate For Engineering [1335609] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn [1335609] Funding Source: National Science Foundation
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Highly compact III-V compound semiconductor active nanophotonic devices integrated with silicon are important for future low power optical interconnects. One approach toward realizing heterogeneous integration and miniaturization of photonic devices is through nanowires/nanopillars grown directly on silicon substrates. However, to realize their full potential, the integration of nanowires/nanopillars with silicon-based electronics must be made scalable via precise control of nanopillar site and dimensions. Here we demonstrate the first electrical-pumped InGaAs/InP multiquantum-well (MQW) light emitting diodes (LED) using nanopillar array directly grown on a Si substrate with site control, with current conduction directly through the silicon. The growth is via catalyst-free, low temperature metal organic chemical vapor deposition, which is CMOS compatible. We report excellent optical properties including long minority carrier lifetimes and room-temperature lasing under optical pumping. InGaAs/InP quantum wells are incorporated in the nanopillars in a core shell growth mode, to obtain silicon transparent emission of similar to 1510 nm with high internal quantum efficiency (similar to 30%). Despite its small footprint, high output power (4 mu W) was measured, and the device could be electrically biased to produce optical gain. CMOS-compatible site controlled growth and electrically driven long-wavelength emission make the InP nano-LED an ideal component in advanced photonic integrated circuits.
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