Photonic Majorana quantum cascade laser with polarization-winding emission

Song Han, Yunda Chua, Yongquan Zeng (), Bofeng Zhu, Chongwu Wang, Bo Qiang, Yuhao Jin, Qian Wang, Lianhe Li, Alexander Giles Davies, Edmund Harold Linfield, Yidong Chong, Baile Zhang and Qi Jie Wang ()
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Song Han: Nanyang Technological University
Yunda Chua: Nanyang Technological University
Yongquan Zeng: Wuhan University
Bofeng Zhu: Nanyang Technological University
Chongwu Wang: Nanyang Technological University
Bo Qiang: Nanyang Technological University
Yuhao Jin: Nanyang Technological University
Qian Wang: Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR)
Lianhe Li: University of Leeds
Alexander Giles Davies: University of Leeds
Edmund Harold Linfield: University of Leeds
Yidong Chong: Nanyang Technological University
Baile Zhang: Nanyang Technological University
Qi Jie Wang: Nanyang Technological University

Nature Communications, 2023, vol. 14, issue 1, 1-7

Abstract: Abstract Topological cavities, whose modes are protected against perturbations, are promising candidates for novel semiconductor laser devices. To date, there have been several demonstrations of topological lasers (TLs) exhibiting robust lasing modes. The possibility of achieving nontrivial beam profiles in TLs has recently been explored in the form of vortex wavefront emissions enabled by a structured optical pump or strong magnetic field, which are inconvenient for device applications. Electrically pumped TLs, by contrast, have attracted attention for their compact footprint and easy on-chip integration with photonic circuits. Here, we experimentally demonstrate an electrically pumped TL based on photonic analogue of a Majorana zero mode (MZM), implemented monolithically on a quantum cascade chip. We show that the MZM emits a cylindrical vector (CV) beam, with a topologically nontrivial polarization profile from a terahertz (THz) semiconductor laser.

Date: 2023
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DOI: 10.1038/s41467-023-36418-y

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