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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2402.19165 |
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| _version_ | 1866913928235188224 |
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| author | Petrović, B. Bader, A. Nauschütz, J. Sato, T. Birner, S. Weih, R. Hartmann, F. Höfling, S. |
| author_facet | Petrović, B. Bader, A. Nauschütz, J. Sato, T. Birner, S. Weih, R. Hartmann, F. Höfling, S. |
| contents | We present a comparison between interband cascade lasers (ICLs) with a 6-stage active region emitting at 5 $μ$m with AlSb/InAs superlattice claddings and with bulk Al_0.85 Ga_0.15 As_0.07 Sb_0.93 claddings. Utilizing bulk AlGaAsSb claddings with their lower refractive index compared to the more commonly used AlSb/InAs superlattice claddings, the mode-confinement in the active region increases by 14.4% resulting in an improvement of the lasing threshold current density. For broad area laser and under pulsed excitation, the ICL with AlGaAsSb claddings shows a lower threshold current density of J_th=396 A/cm$^2$ compared to J_th=521 A/cm$^2$ for the reference ICL with superlattice claddings. Additionally, a higher characteristic temperature was obtained for the ICL with bulk claddings. A measured pulsed operation is observed up to 65 C. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_19165 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | 5.0 $μ$m emitting Interband Cascade Lasers with Superlattice and Bulk AlGaAsSb Claddings Petrović, B. Bader, A. Nauschütz, J. Sato, T. Birner, S. Weih, R. Hartmann, F. Höfling, S. Applied Physics Optics We present a comparison between interband cascade lasers (ICLs) with a 6-stage active region emitting at 5 $μ$m with AlSb/InAs superlattice claddings and with bulk Al_0.85 Ga_0.15 As_0.07 Sb_0.93 claddings. Utilizing bulk AlGaAsSb claddings with their lower refractive index compared to the more commonly used AlSb/InAs superlattice claddings, the mode-confinement in the active region increases by 14.4% resulting in an improvement of the lasing threshold current density. For broad area laser and under pulsed excitation, the ICL with AlGaAsSb claddings shows a lower threshold current density of J_th=396 A/cm$^2$ compared to J_th=521 A/cm$^2$ for the reference ICL with superlattice claddings. Additionally, a higher characteristic temperature was obtained for the ICL with bulk claddings. A measured pulsed operation is observed up to 65 C. |
| title | 5.0 $μ$m emitting Interband Cascade Lasers with Superlattice and Bulk AlGaAsSb Claddings |
| topic | Applied Physics Optics |
| url | https://arxiv.org/abs/2402.19165 |