Highly efficient surface-emitting semiconductor lasers exploiting quasi-crystalline distributed feedback photonic patterns

Simone Biasco; Andrea Ciavatti; Lianhe Li; A Giles Davies; Edmund H. Linfield; Harvey Beere; David Ritchie; Miriam S. Vitiello

doi:10.1038/s41377-020-0294-z

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Highly efficient surface-emitting semiconductor lasers exploiting quasi-crystalline distributed feedback photonic patterns

Original Articles

- Highly efficient surface-emitting semiconductor lasers exploiting quasi-crystalline distributed feedback photonic patterns
- Light: Science & Applications Vol. 9, Issue 3, Pages: 584-594(2020)
- Affiliations：
  
  1.NEST, CNR - Istituto Nanoscienze and Scuola Normale Superiore, Piazza San Silvestro 12, 56127 Pisa, Italy
  2.School of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT, UK
  3.Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, UK
- Author bio：
  
  Miriam S. Vitiello (miriam.vitiello@sns.it)
- Funds：
- DOI：10.1038/s41377-020-0294-z
  CLC：
- Published：2020，
  
  Published Online：09 April 2020，
  
  Received：04 January 2020，
  
  Revised：06 March 2020，
  
  Accepted：17 March 2020
- Accepted：
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Biasco, S. et al. Highly efficient surface-emitting semiconductor lasers exploiting quasi-crystalline distributed feedback photonic patterns. Light: Science & Applications, 9, 584-594 (2020).
DOI：

Biasco, S. et al. Highly efficient surface-emitting semiconductor lasers exploiting quasi-crystalline distributed feedback photonic patterns. Light: Science & Applications, 9, 584-594 (2020). DOI： 10.1038/s41377-020-0294-z.

摘要

Abstract

Quasi-crystal distributed feedback lasers do not require any form

of mirror cavity to amplify and extract radiation. Once implemented on the top surface of a semiconductor laser

a quasi-crystal pattern can be used to tune both the radiation feedback and the extraction of highly radiative and high-quality-factor optical modes that do not have a defined symmetric or anti-symmetric nature. Therefore

this methodology offers the possibility to achieve efficient emission

combined with tailored spectra and controlled beam divergence. Here

we apply this concept to a one-dimensional quantum cascade wire laser. By lithographically patterning a series of air slits with different widths

following the Octonacci sequence

on the top metal layer of a double-metal quantum cascade laser operating at THz frequencies

we can vary the emission from single-frequency-mode to multimode over a 530-GHz bandwidth

achieving a maximum peak optical power of 240 mW (190 mW) in multimode (single-frequency-mode) lasers

with record slope efficiencies for multimode surface-emitting disordered THz lasers up to ≈570 mW/A at 78 K and ≈720 mW/A at 20 K and wall-plug efficiencies of

≈ 1%.

关键词

Keywords

references

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