3.5 Thz Quantum Cascade Laser at 70 K as Local Oscillator
We report a set of measurements to demonstrate a new type of surface emitting distributed feedback (DFB) quantum cascade laser (QCL) operated at 3.5 THz as a local oscillator by pumping a superconducting hot-electron bolometer (HEB) mixer. Based on the Bragg gratings incorporated into the waveguide,...
| Main Authors: | , , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
2015
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| Online Access: | http://hdl.handle.net/1721.1/100394 https://orcid.org/0000-0003-1982-4053 |
| _version_ | 1811071080617476096 |
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| author | Ren, Y. de Visser, P. J. Hovenier, J. N. Zhang, W. Gao, J. R. Klapwijk, T. M. Shi, S. C. Kao, T.-Y. Kumar, S. Reno, J. L. Hu, Qing |
| 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 Ren, Y. de Visser, P. J. Hovenier, J. N. Zhang, W. Gao, J. R. Klapwijk, T. M. Shi, S. C. Kao, T.-Y. Kumar, S. Reno, J. L. Hu, Qing |
| author_sort | Ren, Y. |
| collection | MIT |
| description | We report a set of measurements to demonstrate a new type of surface emitting distributed feedback (DFB) quantum cascade laser (QCL) operated at 3.5 THz as a local oscillator by pumping a superconducting hot-electron bolometer (HEB) mixer. Based on the Bragg gratings incorporated into the waveguide, the second order DFB surface emitting THz QCL shows single mode emission at 3.555 THz, which is only 4 GHz off from the hydroxyl (OH) line. Because of the radiation being emitted from the surface, the far-field beam is much improved, with a divergent far field beam pattern only in one direction. We also notice that in the far field beam pattern, unlike conventional metal-metal waveguide QCLs, there are no interference patterns. All these factors make it possible to fully pump a superconducting NbN HEB mixer at 60 K, and even at 70 K based on the estimated power. |
| first_indexed | 2024-09-23T08:45:45Z |
| format | Article |
| id | mit-1721.1/100394 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:45:45Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | mit-1721.1/1003942022-09-30T11:07:30Z 3.5 Thz Quantum Cascade Laser at 70 K as Local Oscillator Ren, Y. de Visser, P. J. Hovenier, J. N. Zhang, W. Gao, J. R. Klapwijk, T. M. Shi, S. C. Kao, T.-Y. Kumar, S. Reno, J. L. Hu, Qing Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Kao, T.-Y. Kumar, S. Hu, Qing We report a set of measurements to demonstrate a new type of surface emitting distributed feedback (DFB) quantum cascade laser (QCL) operated at 3.5 THz as a local oscillator by pumping a superconducting hot-electron bolometer (HEB) mixer. Based on the Bragg gratings incorporated into the waveguide, the second order DFB surface emitting THz QCL shows single mode emission at 3.555 THz, which is only 4 GHz off from the hydroxyl (OH) line. Because of the radiation being emitted from the surface, the far-field beam is much improved, with a divergent far field beam pattern only in one direction. We also notice that in the far field beam pattern, unlike conventional metal-metal waveguide QCLs, there are no interference patterns. All these factors make it possible to fully pump a superconducting NbN HEB mixer at 60 K, and even at 70 K based on the estimated power. China Exchange Programme Seventh Framework Programme (European Commission) (AMSTAR+ Project of RadioNet) NWO of the Netherlands 2015-12-16T17:29:48Z 2015-12-16T17:29:48Z 2011-04 Article http://purl.org/eprint/type/ConferencePaper 9781618394156 http://hdl.handle.net/1721.1/100394 Ren, Y., et al. "3.5 Thz Quantum Cascade Laser at 70 K as Local Oscillator." 22nd International Symposium on Space Terahertz Technology (April 2011). https://orcid.org/0000-0003-1982-4053 en_US http://www.proceedings.com/13777.html Proceedings of the 22nd International Symposium on Space Terahertz Technology Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Other repository |
| spellingShingle | Ren, Y. de Visser, P. J. Hovenier, J. N. Zhang, W. Gao, J. R. Klapwijk, T. M. Shi, S. C. Kao, T.-Y. Kumar, S. Reno, J. L. Hu, Qing 3.5 Thz Quantum Cascade Laser at 70 K as Local Oscillator |
| title | 3.5 Thz Quantum Cascade Laser at 70 K as Local Oscillator |
| title_full | 3.5 Thz Quantum Cascade Laser at 70 K as Local Oscillator |
| title_fullStr | 3.5 Thz Quantum Cascade Laser at 70 K as Local Oscillator |
| title_full_unstemmed | 3.5 Thz Quantum Cascade Laser at 70 K as Local Oscillator |
| title_short | 3.5 Thz Quantum Cascade Laser at 70 K as Local Oscillator |
| title_sort | 3 5 thz quantum cascade laser at 70 k as local oscillator |
| url | http://hdl.handle.net/1721.1/100394 https://orcid.org/0000-0003-1982-4053 |
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