Giant photon momentum locked THz emission in a centrosymmetric Dirac semimetal
Strong second-order optical nonlinearities often require broken material centrosymmetry, thereby limiting the type and quality of materials used for nonlinear optical devices. Here, we report a giant and highly tunable terahertz (THz) emission from thin polycrystalline films of the centrosymmetric D...
| Main Authors: | , , , , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/168789 |
| _version_ | 1811687835060666368 |
|---|---|
| author | Cheng, Liang Xiong, Ying Kang, Lixing Gao, Yu Chang, Qing Chen, Mengji Qi, Jingbo Yang, Hyunsoo Liu, Zheng Song, Justin Chien Wen Chia, Elbert E. M. |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Cheng, Liang Xiong, Ying Kang, Lixing Gao, Yu Chang, Qing Chen, Mengji Qi, Jingbo Yang, Hyunsoo Liu, Zheng Song, Justin Chien Wen Chia, Elbert E. M. |
| author_sort | Cheng, Liang |
| collection | NTU |
| description | Strong second-order optical nonlinearities often require broken material centrosymmetry, thereby limiting the type and quality of materials used for nonlinear optical devices. Here, we report a giant and highly tunable terahertz (THz) emission from thin polycrystalline films of the centrosymmetric Dirac semimetal PtSe2. Our PtSe2 THz emission is turned on at oblique incidence and locked to the photon momentum of the incident pump beam. Notably, we find an emitted THz efficiency that is giant: It is two orders of magnitude larger than the standard THz-generating nonlinear crystal ZnTe and has values approaching that of the noncentrosymmetric topological material TaAs. Further, PtSe2 THz emission displays THz sign and amplitude that is controlled by the incident pump polarization and helicity state even as optical absorption is only weakly polarization dependent and helicity independent. Our work demonstrates how photon drag can activate pronounced optical nonlinearities that are available even in centrosymmetric Dirac materials. |
| first_indexed | 2024-10-01T05:22:37Z |
| format | Journal Article |
| id | ntu-10356/168789 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:22:37Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1687892024-03-26T02:53:04Z Giant photon momentum locked THz emission in a centrosymmetric Dirac semimetal Cheng, Liang Xiong, Ying Kang, Lixing Gao, Yu Chang, Qing Chen, Mengji Qi, Jingbo Yang, Hyunsoo Liu, Zheng Song, Justin Chien Wen Chia, Elbert E. M. School of Physical and Mathematical Sciences Centrosymmetry Nonlinear Optical Devices Strong second-order optical nonlinearities often require broken material centrosymmetry, thereby limiting the type and quality of materials used for nonlinear optical devices. Here, we report a giant and highly tunable terahertz (THz) emission from thin polycrystalline films of the centrosymmetric Dirac semimetal PtSe2. Our PtSe2 THz emission is turned on at oblique incidence and locked to the photon momentum of the incident pump beam. Notably, we find an emitted THz efficiency that is giant: It is two orders of magnitude larger than the standard THz-generating nonlinear crystal ZnTe and has values approaching that of the noncentrosymmetric topological material TaAs. Further, PtSe2 THz emission displays THz sign and amplitude that is controlled by the incident pump polarization and helicity state even as optical absorption is only weakly polarization dependent and helicity independent. Our work demonstrates how photon drag can activate pronounced optical nonlinearities that are available even in centrosymmetric Dirac materials. Ministry of Education (MOE) Nanyang Technological University National Research Foundation (NRF) Published version This work was supported by the Singapore Ministry of Education Academic Research Fund Tier 3 grant no. MOE2018-T3-1-002 (to E.E.M.C., J.C.W.S., and Z.L.); a Nanyang Technological University Singapore Start-up Grant NTU-SUG (to J.C.W.S.); the National Natural Science Foundation of China grant nos. 11974070 (to J.Q.), 11734006 (to J.Q.), 12004067 (to L.C.), and 62027807 (to L.C.); and a National Research Foundation Singapore Investigatorship NRFI06-2020-0015 (to H.Y.). 2023-06-19T06:36:11Z 2023-06-19T06:36:11Z 2023 Journal Article Cheng, L., Xiong, Y., Kang, L., Gao, Y., Chang, Q., Chen, M., Qi, J., Yang, H., Liu, Z., Song, J. C. W. & Chia, E. E. M. (2023). Giant photon momentum locked THz emission in a centrosymmetric Dirac semimetal. Science Advances, 9(1), eadd7856-. https://dx.doi.org/10.1126/sciadv.add7856 2375-2548 https://hdl.handle.net/10356/168789 10.1126/sciadv.add7856 36598995 2-s2.0-85145547445 1 9 eadd7856 en MOE2018-T3-1-002 NRFI06-2020-0015 NTU-SUG Science Advances 10.21979/N9/OGAQ7R © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). application/pdf |
| spellingShingle | Centrosymmetry Nonlinear Optical Devices Cheng, Liang Xiong, Ying Kang, Lixing Gao, Yu Chang, Qing Chen, Mengji Qi, Jingbo Yang, Hyunsoo Liu, Zheng Song, Justin Chien Wen Chia, Elbert E. M. Giant photon momentum locked THz emission in a centrosymmetric Dirac semimetal |
| title | Giant photon momentum locked THz emission in a centrosymmetric Dirac semimetal |
| title_full | Giant photon momentum locked THz emission in a centrosymmetric Dirac semimetal |
| title_fullStr | Giant photon momentum locked THz emission in a centrosymmetric Dirac semimetal |
| title_full_unstemmed | Giant photon momentum locked THz emission in a centrosymmetric Dirac semimetal |
| title_short | Giant photon momentum locked THz emission in a centrosymmetric Dirac semimetal |
| title_sort | giant photon momentum locked thz emission in a centrosymmetric dirac semimetal |
| topic | Centrosymmetry Nonlinear Optical Devices |
| url | https://hdl.handle.net/10356/168789 |
| work_keys_str_mv | AT chengliang giantphotonmomentumlockedthzemissioninacentrosymmetricdiracsemimetal AT xiongying giantphotonmomentumlockedthzemissioninacentrosymmetricdiracsemimetal AT kanglixing giantphotonmomentumlockedthzemissioninacentrosymmetricdiracsemimetal AT gaoyu giantphotonmomentumlockedthzemissioninacentrosymmetricdiracsemimetal AT changqing giantphotonmomentumlockedthzemissioninacentrosymmetricdiracsemimetal AT chenmengji giantphotonmomentumlockedthzemissioninacentrosymmetricdiracsemimetal AT qijingbo giantphotonmomentumlockedthzemissioninacentrosymmetricdiracsemimetal AT yanghyunsoo giantphotonmomentumlockedthzemissioninacentrosymmetricdiracsemimetal AT liuzheng giantphotonmomentumlockedthzemissioninacentrosymmetricdiracsemimetal AT songjustinchienwen giantphotonmomentumlockedthzemissioninacentrosymmetricdiracsemimetal AT chiaelbertem giantphotonmomentumlockedthzemissioninacentrosymmetricdiracsemimetal |