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We propose a new design for buried heterostructure photonic crystal nanocavity lasers with in-line coupled output waveguides and coupling buffer regions. This design enables us to realize single-mode lasing and a high output power for a current-injected nanolaser.
We have developed an electrically driven photonic-crystal nanocavity laser with an ultra-low threshold current and a high temperature characteristic. Lasing is achieved under continuous-wave operation at high temperatures of up to 95°C.
An electrically driven photonic-crystal nanocavity laser with a buried heterostructure exhibits a record low threshold current of 14 µA at 25°C. High-temperature operation up to 95°C is achieved by using the InGaAlAs-based multiple-quantum-well active region.
Linewidth of buried heterostructure photonic crystal nanolaser are studied in terms of output power. We report a linewidth of 143.5 MHz and it is the narrowest linewidth ever reported for photonic crystal based lasers.
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