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Vertical Emitting Nanowire Vector Beam Lasers.

Xutao Zhang1, Ruixuan Yi2, Bijun Zhao2

  • 1Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE), and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China.

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Summary
This summary is machine-generated.

Researchers developed a compact vector beam (VB) nanolaser using a nanowire. This breakthrough enables VB applications in miniaturized photonic circuits, overcoming subwavelength limitations for advanced optical technologies.

Keywords:
GaAs/InGaAsnanowire lasernear-infraredvector beamvertical emission

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Area of Science:

  • Photonics and Nanotechnology
  • Optics and Laser Technology

Background:

  • Vector beams (VBs) with spatially variant polarization are crucial for advanced imaging and optical communications.
  • Miniaturized photonic integrated circuits require compact VB sources.
  • Realizing subwavelength VB nanolasers is challenging due to diffraction limits and mode structure requirements.

Purpose of the Study:

  • To demonstrate a compact vector beam (VB) nanolaser.
  • To overcome the diffraction limit for VB lasing at the subwavelength scale.
  • To enable VB applications in miniaturized photonic integrated circuits.

Main Methods:

  • Fabrication of a 300 nm thick InGaAs/GaAs nanowire (NW) nanolaser.
  • Utilizing a standing NW grown by selective-area-epitaxial (SAE) growth.
  • Employing the donut-shaped interface of the NW as a reflective mirror for the nanolaser cavity.

Main Results:

  • Demonstration of a single-mode VB lasing mode.
  • Observation of a donut-shaped amplitude profile.
  • Achieved azimuthally cylindrical polarization distribution.
  • The donut-shaped interface resulted in the lowest threshold for the VB lasing mode.

Conclusions:

  • A straightforward and scalable method for creating VB nanolasers was developed.
  • The SAE-grown NWs offer high yield and uniformity.
  • This work paves the way for cost-effective co-integration of VB nanolasers onto photonic integrated circuits.