Avalanche-mode_Si_light-emitting_transistor_for_narrow-band_emission_near_760_nm.pdf (2.2 MB)
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Avalanche-mode Si light-emitting transistor for narrow-band emission near 760 nm

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posted on 2022-09-01, 21:01 authored by Satadal DuttaSatadal Dutta, Raymond Hueting, Gerard J. Verbiest

We report an avalanche-mode light-emitting transistor (AMLET) in silicon (Si), based on a lateral bipolar junction, which emits light near 760 nm optical wavelength with a record low bandwidth of 38 nm. The AMLET, designed in a CMOS-compatible silicon-on-insulator (SOI) photonics platform, is optically confined within a 0.21 μm thick SOI layer, which forms a Fabry-Perot (FP) resonator perpendicular to the Si surface. Light is emitted from the reverse biased emitter-base junction via phonon-assisted hot carrier recombination and, additionally, minority carriers are injected via the forward-biased Base-Collector junction. The combination of injection from collector terminal through a narrow base and FP optical resonance, yields a high optical power efficiency of 4.3×10−6 at VBC = 0.8 V and VEB = 10 V. Our work opens new possibilities in spectralengineering of Si light-emitters, which could boost performance of all-Si optical interconnects and sensors.


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Delft University of Technology

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  • Netherlands