Zhu, H, Wang, F, Yan, Q et al. (11 more authors) (2016) Terahertz master-oscillator power-amplifier quantum cascade lasers. Applied Physics Letters, 109 (23). 231105. ISSN 0003-6951
Abstract
We report on the realization of a monolithically integrated master-oscillator power-amplifier architecture in a terahertz quantum cascade laser (THz-QCL) with a metal-metal waveguide. The master-oscillator section is a first-order distributed feedback (DFB) laser. Instead of using a thick anti-reflection coating, we exploit a diffraction grating together with an absorbing boundary in the power-amplifier section to efficiently extract the laser radiation and suppress the self-lasing in it. The devices demonstrate a stable generation and power amplification of single-mode emission. The amplification factor is about 5, and the output power is approximately twice that of the standard second-order DFB lasers fabricated from the same material. Emission beam pattern with a divergence angle of ∼18 × 40° is achieved. Our work provides an avenue for the realization of single-mode THz-QCLs with high output power and good beam quality.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Published by AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared as 'Zhu, H , Wang, F , Yan, Q et al. (2016) Terahertz master-oscillator power-amplifier quantum cascade lasers. Applied Physics Letters, 109 (23). 231105,' and may be found at: https://doi.org/10.1063/1.4969067. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) |
Funding Information: | Funder Grant number Royal Society WM110032 EPSRC EP/J017671/1 EU - European Union GA 665158 Royal Society WM150029 |
Depositing User: | Symplectic Publications |
Date Deposited: | 12 Dec 2016 16:52 |
Last Modified: | 19 Dec 2017 05:46 |
Published Version: | https://doi.org/10.1063/1.4969067 |
Status: | Published |
Publisher: | AIP Publishing |
Identification Number: | 10.1063/1.4969067 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:109366 |