Short period InGaAs/AlInAs THz quantum cascade laser in thin double metal cavities operating up to 188K
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866917275804631040 |
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| author | Gloor, Sebastian Stark, David Frankié, Martin Senica, Urban Beck, Mattias Scalari, Giacomo Faist, Jérôme |
| author_facet | Gloor, Sebastian Stark, David Frankié, Martin Senica, Urban Beck, Mattias Scalari, Giacomo Faist, Jérôme |
| contents | We present a two-well terahertz (THz) quantum cascade laser designed for high temperature operation based on the InGaAs/AlInAs material system. The lighter effective mass and higher energy barriers increase the gain at high temperatures (T > 150K). When processed in copper-based double metal waveguides the devices show laser action up to a maximum operating temperature of 188K with a maximum current density of 1.4kA/cm$^2$. The low Joule heating due to reduced active region thickness and low electrical bias allows operation at 10% duty cycle up to a temperature of 170K. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_14576 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Short period InGaAs/AlInAs THz quantum cascade laser in thin double metal cavities operating up to 188K Gloor, Sebastian Stark, David Frankié, Martin Senica, Urban Beck, Mattias Scalari, Giacomo Faist, Jérôme Optics We present a two-well terahertz (THz) quantum cascade laser designed for high temperature operation based on the InGaAs/AlInAs material system. The lighter effective mass and higher energy barriers increase the gain at high temperatures (T > 150K). When processed in copper-based double metal waveguides the devices show laser action up to a maximum operating temperature of 188K with a maximum current density of 1.4kA/cm$^2$. The low Joule heating due to reduced active region thickness and low electrical bias allows operation at 10% duty cycle up to a temperature of 170K. |
| title | Short period InGaAs/AlInAs THz quantum cascade laser in thin double metal cavities operating up to 188K |
| topic | Optics |
| url | https://arxiv.org/abs/2602.14576 |