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Two-dimensional coherently coupled photonic crystal ion-implanted bottom emitting vertical cavity surface emitting laser arrays are demonstrated. Subthreshold luminescence shows uniform current injection below threshold, benefiting from the improved contact alignment compared with the top emitting arrays. In-phase operation has been achieved in $2\times 2$ and $3\times 3$ arrays at lasing threshold...
Epitaxial lift-off (ELO) is a process technology that can enable substantial performance enhancement and cost reduction for epitaxially grown III–V devices. [1]–[4] In particular, GaAs-based inverted metamorphic multijunction (IMM) solar cells are an attractive technology that provides flexible, light-weight and high-efficiency solar panels for portable-power and unmanned aerial vehicle (UAV) applications...
Coherently coupled vertical cavity surface emitting laser (VCSEL) arrays have the potential for ultra-compact beam steering [1], high brightness [2], and high bandwidth modulation [3] microcavity laser sources, all of which are critical components for emerging photonic capabilities. We have developed phased VCSEL arrays which utilize a photonic crystal to define the multiple optical cavities combined...
We demonstrate 2-dimentional coherently coupled bottom-emitting VCSEL arrays. In-phase operation has been obtained from 3-element triangular arrays, while out-of-phase operation has been obtained from 2×2, 3×3, and 4×4 arrays.
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