Terahertz quantum cascade lasers operating up to ~ 200 K with optimized oscillator strength and improved injection tunneling
A new temperature performance record of 199.5 K for terahertz quantum cascade lasers is achieved by optimizing the lasing transition oscillator strength of the resonant phonon based three-well design. The optimum oscillator strength of 0.58 was found to be larger than that of the previous record (0....
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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Optical Society of America
2014
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| Online Access: | http://hdl.handle.net/1721.1/86343 https://orcid.org/0000-0003-1982-4053 |
| _version_ | 1826200826176077824 |
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| author | Fathololoumi, S. Dupont, E. Wasilewski, Z. R. Laframboise, Sylvain R. Ban, D. Jirauschek, C. Liu, H. C. Chan, Chun Wang Ivan Hu, Qing Matyas, A. |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Fathololoumi, S. Dupont, E. Wasilewski, Z. R. Laframboise, Sylvain R. Ban, D. Jirauschek, C. Liu, H. C. Chan, Chun Wang Ivan Hu, Qing Matyas, A. |
| author_sort | Fathololoumi, S. |
| collection | MIT |
| description | A new temperature performance record of 199.5 K for terahertz quantum cascade lasers is achieved by optimizing the lasing transition oscillator strength of the resonant phonon based three-well design. The optimum oscillator strength of 0.58 was found to be larger than that of the previous record (0.41) by Kumar et al. [Appl. Phys. Lett. 94, 131105 (2009)]. The choice of tunneling barrier thicknesses was determined with a simplified density matrix model, which converged towards higher tunneling coupling strengths than previously explored and nearly perfect alignment of the states across the injection and extraction barriers at the design electric field. At 8 K, the device showed a threshold current density of 1 kA/cm[superscript 2], with a peak output power of ~ 38 mW, and lasing frequency blue-shifting from 2.6 THz to 2.85 THz with increasing bias. The wavelength blue-shifted to 3.22 THz closer to the maximum operating temperature of 199.5 K, which corresponds to ~ 1.28ħω/κ[subscript B]. The voltage dependence of laser frequency is related to the Stark effect of two intersubband transitions and is compared with the simulated gain spectra obtained by a Monte Carlo approach. |
| first_indexed | 2024-09-23T11:42:23Z |
| format | Article |
| id | mit-1721.1/86343 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:42:23Z |
| publishDate | 2014 |
| publisher | Optical Society of America |
| record_format | dspace |
| spelling | mit-1721.1/863432022-09-27T21:20:31Z Terahertz quantum cascade lasers operating up to ~ 200 K with optimized oscillator strength and improved injection tunneling Fathololoumi, S. Dupont, E. Wasilewski, Z. R. Laframboise, Sylvain R. Ban, D. Jirauschek, C. Liu, H. C. Chan, Chun Wang Ivan Hu, Qing Matyas, A. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology. Research Laboratory of Electronics Chan, Chun Wang Ivan Hu, Qing A new temperature performance record of 199.5 K for terahertz quantum cascade lasers is achieved by optimizing the lasing transition oscillator strength of the resonant phonon based three-well design. The optimum oscillator strength of 0.58 was found to be larger than that of the previous record (0.41) by Kumar et al. [Appl. Phys. Lett. 94, 131105 (2009)]. The choice of tunneling barrier thicknesses was determined with a simplified density matrix model, which converged towards higher tunneling coupling strengths than previously explored and nearly perfect alignment of the states across the injection and extraction barriers at the design electric field. At 8 K, the device showed a threshold current density of 1 kA/cm[superscript 2], with a peak output power of ~ 38 mW, and lasing frequency blue-shifting from 2.6 THz to 2.85 THz with increasing bias. The wavelength blue-shifted to 3.22 THz closer to the maximum operating temperature of 199.5 K, which corresponds to ~ 1.28ħω/κ[subscript B]. The voltage dependence of laser frequency is related to the Stark effect of two intersubband transitions and is compared with the simulated gain spectra obtained by a Monte Carlo approach. United States. National Aeronautics and Space Administration National Science Foundation (U.S.) 2014-05-01T18:45:43Z 2014-05-01T18:45:43Z 2012-02 2012-01 Article http://purl.org/eprint/type/JournalArticle 1094-4087 http://hdl.handle.net/1721.1/86343 Fathololoumi, S., E. Dupont, C.W.I. Chan, Z.R. Wasilewski, S.R. Laframboise, D. Ban, A. Matyas, C. Jirauschek, Q. Hu, and H. C. Liu. “Terahertz Quantum Cascade Lasers Operating up to ∼ 200 K with Optimized Oscillator Strength and Improved Injection Tunneling.” Optics Express 20, no. 4 (February 13, 2012): 3866. © 2012 OSA https://orcid.org/0000-0003-1982-4053 en_US http://dx.doi.org/10.1364/OE.20.003866 Optics Express Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf Optical Society of America MIT web domain |
| spellingShingle | Fathololoumi, S. Dupont, E. Wasilewski, Z. R. Laframboise, Sylvain R. Ban, D. Jirauschek, C. Liu, H. C. Chan, Chun Wang Ivan Hu, Qing Matyas, A. Terahertz quantum cascade lasers operating up to ~ 200 K with optimized oscillator strength and improved injection tunneling |
| title | Terahertz quantum cascade lasers operating up to ~ 200 K with optimized oscillator strength and improved injection tunneling |
| title_full | Terahertz quantum cascade lasers operating up to ~ 200 K with optimized oscillator strength and improved injection tunneling |
| title_fullStr | Terahertz quantum cascade lasers operating up to ~ 200 K with optimized oscillator strength and improved injection tunneling |
| title_full_unstemmed | Terahertz quantum cascade lasers operating up to ~ 200 K with optimized oscillator strength and improved injection tunneling |
| title_short | Terahertz quantum cascade lasers operating up to ~ 200 K with optimized oscillator strength and improved injection tunneling |
| title_sort | terahertz quantum cascade lasers operating up to 200 k with optimized oscillator strength and improved injection tunneling |
| url | http://hdl.handle.net/1721.1/86343 https://orcid.org/0000-0003-1982-4053 |
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