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- W2805860480 abstract "Broadband terahertz radiation potentially has extensive applications, ranging from personal health care to industrial quality control and security screening. While traditional methods for broadband terahertz generation rely on bulky and expensive mode-locked lasers, frequency combs based on quantum cascade lasers (QCLs) can provide an alternative compact, high power, wideband terahertz source. QCL frequency combs incorporating a heterogeneous gain medium design can obtain even greater spectral range by having multiple lasing transitions at different frequencies. However, despite their greater spectral coverage, the comparatively low gain from such gain media lowers the maximum operating temperature and power. Lateral heterogeneous integration offers the ability to cover an extensive spectral range while maintaining the competitive performance offered from each homogeneous gain media. Here, we present the first lateral heterogeneous design for broadband terahertz generation: by combining two different homogeneous gain media, we have achieved a two-color frequency comb spaced by 1.5 THz." @default.
- W2805860480 created "2018-06-13" @default.
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- W2805860480 date "2018-06-07" @default.
- W2805860480 modified "2023-09-26" @default.
- W2805860480 title "Lateral Heterogeneous Integration of Quantum Cascade Lasers" @default.
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- W2805860480 doi "https://doi.org/10.1021/acsphotonics.8b00507" @default.
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