Design and experimental demonstration of photonic-crystal lasers with multijunction active layers

We introduce multijunction active layers, featuring a stack of alternating active layers and tunnel junctions, to photonic-crystal surface-emitting lasers (PCSELs) to increase their slope efficiency, which is vital for various applications including laser processing and LiDAR. First, we design a multijunction PCSEL that avoids optical absorption in the heavily-doped tunnel junctions while allowing sufficient optical gain and resonance effects in the active and photonic crystal layers. Next, we fabricate a 3-mm-diameter two-junction PCSEL, achieving a slope efficiency of 1.58 W A−1, which is over twice as high as that of conventional single-junction PCSELs, and a record-high peak output power of 1.8 kW for PCSELs.

• Publication year

  2024

• Venue

  Applied Physics Express

• Publication date

  2024-09-25

• Fields of study

  Physics, Engineering

• Identifiers
  DOI 10.35848/1882-0786/ad9430arXiv 2409.16880
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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