Imaging of THz waves in 2D photonic crystal structures embedded in a slab waveguide
We present space- and time-resolved simulations and measurements of single-cycle terahertz (THz) waves propagating through two-dimensional (2D) photonic crystal structures embedded in a slab waveguide. Specifically, we use a plane wave expansion technique to calculate the band structure and a time-d...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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Institute of Physics Publishing
2012
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| Online Access: | http://hdl.handle.net/1721.1/70844 https://orcid.org/0000-0001-7804-5418 |
| _version_ | 1826200637416669184 |
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| author | Peier, P. Merbold, H. Pahinin, V. Nelson, Keith Adam Feurer, T. |
| author2 | Massachusetts Institute of Technology. Department of Chemistry |
| author_facet | Massachusetts Institute of Technology. Department of Chemistry Peier, P. Merbold, H. Pahinin, V. Nelson, Keith Adam Feurer, T. |
| author_sort | Peier, P. |
| collection | MIT |
| description | We present space- and time-resolved simulations and measurements of single-cycle terahertz (THz) waves propagating through two-dimensional (2D) photonic crystal structures embedded in a slab waveguide. Specifically, we use a plane wave expansion technique to calculate the band structure and a time-dependent finite-element method to simulate the temporal evolution of the THz waves. Experimentally, we measure the space–time evolution of the THz waves through a coherent time-resolved imaging method. Three different structures are laser machined in LiNbO3 crystal slabs and analyzing the transmitted as well as the reflected THz waveforms allows determination of the bandgaps. Comparing the results with the calculated band diagrams and the time-dependent simulations shows that the experiments are consistent with 3D simulations, which include the slab waveguide geometry, the birefringence of the material, and a careful analysis of the excited modes within the band diagrams. |
| first_indexed | 2024-09-23T11:39:31Z |
| format | Article |
| id | mit-1721.1/70844 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:39:31Z |
| publishDate | 2012 |
| publisher | Institute of Physics Publishing |
| record_format | dspace |
| spelling | mit-1721.1/708442022-10-01T05:05:14Z Imaging of THz waves in 2D photonic crystal structures embedded in a slab waveguide Peier, P. Merbold, H. Pahinin, V. Nelson, Keith Adam Feurer, T. Massachusetts Institute of Technology. Department of Chemistry Nelson, Keith Adam Nelson, Keith Adam We present space- and time-resolved simulations and measurements of single-cycle terahertz (THz) waves propagating through two-dimensional (2D) photonic crystal structures embedded in a slab waveguide. Specifically, we use a plane wave expansion technique to calculate the band structure and a time-dependent finite-element method to simulate the temporal evolution of the THz waves. Experimentally, we measure the space–time evolution of the THz waves through a coherent time-resolved imaging method. Three different structures are laser machined in LiNbO3 crystal slabs and analyzing the transmitted as well as the reflected THz waveforms allows determination of the bandgaps. Comparing the results with the calculated band diagrams and the time-dependent simulations shows that the experiments are consistent with 3D simulations, which include the slab waveguide geometry, the birefringence of the material, and a careful analysis of the excited modes within the band diagrams. Swiss National Science Foundation (project no. 200020-119934) 2012-05-16T15:39:47Z 2012-05-16T15:39:47Z 2010-01 2009-09 Article http://purl.org/eprint/type/JournalArticle 1367-2630 http://hdl.handle.net/1721.1/70844 Peier, P et al. “Imaging of THz Waves in 2D Photonic Crystal Structures Embedded in a Slab Waveguide.” New Journal of Physics 12.1 (2010): 013014. Web. https://orcid.org/0000-0001-7804-5418 en_US http://dx.doi.org/10.1088/1367-2630/12/1/013014 New Journal of Physics Creative Commons Attribution 3.0 http://creativecommons.org/licenses/by/2.5/ application/pdf Institute of Physics Publishing New Journal of Physics |
| spellingShingle | Peier, P. Merbold, H. Pahinin, V. Nelson, Keith Adam Feurer, T. Imaging of THz waves in 2D photonic crystal structures embedded in a slab waveguide |
| title | Imaging of THz waves in 2D photonic crystal structures embedded in a slab waveguide |
| title_full | Imaging of THz waves in 2D photonic crystal structures embedded in a slab waveguide |
| title_fullStr | Imaging of THz waves in 2D photonic crystal structures embedded in a slab waveguide |
| title_full_unstemmed | Imaging of THz waves in 2D photonic crystal structures embedded in a slab waveguide |
| title_short | Imaging of THz waves in 2D photonic crystal structures embedded in a slab waveguide |
| title_sort | imaging of thz waves in 2d photonic crystal structures embedded in a slab waveguide |
| url | http://hdl.handle.net/1721.1/70844 https://orcid.org/0000-0001-7804-5418 |
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