Micropillars with low-absorption DBRs enable surface-emitting WGM lasing at 930-970 nm for 3-7 μm diameters, with single-mode operation at 130 K showing Q ≈ 8000 and ~240 μW threshold.
Ultrasmall and ultralow threshold GaInAsP-InP microdisk injection lasers: design, fabrication, lasing characteristics, and spontaneous emission factor,
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Low-Threshold Surface-Emitting Whispering-Gallery Mode Microlasers
Micropillars with low-absorption DBRs enable surface-emitting WGM lasing at 930-970 nm for 3-7 μm diameters, with single-mode operation at 130 K showing Q ≈ 8000 and ~240 μW threshold.