期刊
APPLIED PHYSICS LETTERS
卷 107, 期 7, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4927851
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资金
- Austrian Science Funds (FWF) [W1243]
- FP7 EU-project ICARUS [FP7-SEC-2011-285417]
- APART Fellowship of the Austrian Academy of Sciences
- [NextLite F4909-N23]
- Austrian Science Fund (FWF) [W1243] Funding Source: Austrian Science Fund (FWF)
An improved bi-functional quantum cascade laser and detector emitting and detecting around 6: 8 mu m is demonstrated. The design allows a significantly higher laser performance, showing that bi-functional designs can achieve a comparable pulsed performance to conventional quantum cascade lasers. In particular, the device has a threshold current density of 3 kA/cm(2), an output power of 0.47 W, and a total wall-plug efficiency of 4.5% in pulsed mode. Optimized electron extraction and the prevention of thermal backfilling allow higher duty cycles, operation up to 10%, with 15mW average output power at room temperature without optimization of the laser cavity or coatings. At zero bias, the device has a responsivity of around 40 mA/W and a noise equivalent power of 80pW/root Hz at room temperature, which in on-chip configuration outperforms conventional uncooled discrete detectors. (C) 2015 Author(s).
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