THz generation using a reflective stair-step echelon
We present a novel method for THz generation in lithium niobate using a reflective stair-step echelon structure. The echelon produces a discretely tilted pulse front with less angular dispersion compared to a high groove-density grating. The THz output was characterized using both a 1-lens and 3-len...
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| Format: | Article |
| Language: | en_US |
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Optical Society of America
2017
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| Online Access: | http://hdl.handle.net/1721.1/110409 https://orcid.org/0000-0002-0737-6786 https://orcid.org/0000-0002-1603-4067 https://orcid.org/0000-0003-1678-7867 https://orcid.org/0000-0001-7804-5418 |
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| author | Ofori-Okai, Benjamin Kwasi Sivarajah, Prasahnt Huang, Wenqian Nelson, Keith Adam |
| author2 | Massachusetts Institute of Technology. Department of Chemistry |
| author_facet | Massachusetts Institute of Technology. Department of Chemistry Ofori-Okai, Benjamin Kwasi Sivarajah, Prasahnt Huang, Wenqian Nelson, Keith Adam |
| author_sort | Ofori-Okai, Benjamin Kwasi |
| collection | MIT |
| description | We present a novel method for THz generation in lithium niobate using a reflective stair-step echelon structure. The echelon produces a discretely tilted pulse front with less angular dispersion compared to a high groove-density grating. The THz output was characterized using both a 1-lens and 3-lens imaging system to set the tilt angle at room and cryogenic temperatures. Using broadband 800 nm pulses with a pulse energy of 0.95 mJ and a pulse duration of 70 fs (24 nm FWHM bandwidth, 39 fs transform limited width), we produced THz pulses with field strengths as high as 500 kV/cm and pulse energies as high as 3.1 μJ. The highest conversion efficiency we obtained was 0.33%. In addition, we find that the echelon is easily implemented into an experimental setup for quick alignment and optimization. |
| first_indexed | 2024-09-23T10:18:15Z |
| format | Article |
| id | mit-1721.1/110409 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:18:15Z |
| publishDate | 2017 |
| publisher | Optical Society of America |
| record_format | dspace |
| spelling | mit-1721.1/1104092022-09-30T20:16:43Z THz generation using a reflective stair-step echelon Ofori-Okai, Benjamin Kwasi Sivarajah, Prasahnt Huang, Wenqian Nelson, Keith Adam Massachusetts Institute of Technology. Department of Chemistry Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology. Research Laboratory of Electronics Ofori-Okai, Benjamin Kwasi Sivarajah, Prasahnt Huang, Wenqian Nelson, Keith Adam We present a novel method for THz generation in lithium niobate using a reflective stair-step echelon structure. The echelon produces a discretely tilted pulse front with less angular dispersion compared to a high groove-density grating. The THz output was characterized using both a 1-lens and 3-lens imaging system to set the tilt angle at room and cryogenic temperatures. Using broadband 800 nm pulses with a pulse energy of 0.95 mJ and a pulse duration of 70 fs (24 nm FWHM bandwidth, 39 fs transform limited width), we produced THz pulses with field strengths as high as 500 kV/cm and pulse energies as high as 3.1 μJ. The highest conversion efficiency we obtained was 0.33%. In addition, we find that the echelon is easily implemented into an experimental setup for quick alignment and optimization. Samsung (Firm) (Global Research Outreach (GRO) Program) National Science Foundation (U.S.). Graduate Research Fellowship Program Natural Sciences and Engineering Research Council of Canada (Postgraduate Scholarship) American Society for Engineering Education. National Defense Science and Engineering Graduate Fellowship 2017-06-30T23:02:44Z 2017-06-30T23:02:44Z 2016-02 2016-02 Article http://purl.org/eprint/type/JournalArticle 1094-4087 http://hdl.handle.net/1721.1/110409 Ofori-Okai, Benjamin K., Prasahnt Sivarajah, W. Ronny Huang, and Keith A. Nelson. “THz Generation Using a Reflective Stair-Step Echelon.” Optics Express 24, no. 5 (February 29, 2016): 5057. https://orcid.org/0000-0002-0737-6786 https://orcid.org/0000-0002-1603-4067 https://orcid.org/0000-0003-1678-7867 https://orcid.org/0000-0001-7804-5418 en_US http://dx.doi.org/10.1364/oe.24.005057 Optics Express Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Optical Society of America arXiv |
| spellingShingle | Ofori-Okai, Benjamin Kwasi Sivarajah, Prasahnt Huang, Wenqian Nelson, Keith Adam THz generation using a reflective stair-step echelon |
| title | THz generation using a reflective stair-step echelon |
| title_full | THz generation using a reflective stair-step echelon |
| title_fullStr | THz generation using a reflective stair-step echelon |
| title_full_unstemmed | THz generation using a reflective stair-step echelon |
| title_short | THz generation using a reflective stair-step echelon |
| title_sort | thz generation using a reflective stair step echelon |
| url | http://hdl.handle.net/1721.1/110409 https://orcid.org/0000-0002-0737-6786 https://orcid.org/0000-0002-1603-4067 https://orcid.org/0000-0003-1678-7867 https://orcid.org/0000-0001-7804-5418 |
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