Peipei Cong

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We demonstrated stimulated emission at 288 nm from a silicon-doped AlGaN-based multiple-quantum-well (MQW) ultraviolet (UV) laser grown on sapphire. The optical pumping threshold energy density of the UV laser was 64 mJ/cm2, while lasing behavior was not observed in undoped AlGaN MQWs. This means silicon doping could effectively reduce the lasing threshold(More)
A wireless system-on-chip with integrated antenna, power harvesting and biosensors is presented that is small enough, 200µm × 200µm × 100µm, to allow painless injection. Small device size is enabled by: a 13µm × 20µm 1nA current reference; optical clock recovery; low voltage inverting dc-dc to enable(More)
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