Normal doppler frequency shift in negative refractive‐index systems
Besides the well‐known negative refraction, a negative refractive‐index material can exhibit another two hallmark features, which are the inverse Doppler effect and backward Cherenkov radiation. The former is known as the motion‐induced frequency shift that is contrary to the normal Doppler effect,...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/138666 |
| _version_ | 1811695682516418560 |
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| author | Lin, Xiao Zhang, Baile |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Lin, Xiao Zhang, Baile |
| author_sort | Lin, Xiao |
| collection | NTU |
| description | Besides the well‐known negative refraction, a negative refractive‐index material can exhibit another two hallmark features, which are the inverse Doppler effect and backward Cherenkov radiation. The former is known as the motion‐induced frequency shift that is contrary to the normal Doppler effect, and the latter refers to the Cherenkov radiation whose cone direction is opposite to the source's motion. Here these two features are combined and the Doppler effect inside the backward Cherenkov cone is discussed. It is revealed that the Doppler effect is not always inversed but can be normal in negative refractive‐index systems. A previously un‐reported phenomenon of normal Doppler frequency shift is proposed in a regime inside the backward Cherenkov cone, when the source's velocity is two times faster than the phase velocity of light. A realistic metal–insulator–metal structure, which supports metal plasmons with an effective negative refractive index, is adopted to demonstrate the potential realization of this phenomenon. |
| first_indexed | 2024-10-01T07:27:21Z |
| format | Journal Article |
| id | ntu-10356/138666 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:27:21Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1386662023-02-28T20:04:31Z Normal doppler frequency shift in negative refractive‐index systems Lin, Xiao Zhang, Baile School of Physical and Mathematical Sciences Centre for Disruptive Photonic Technologies Science::Physics Cherenkov Radiation Doppler Effect Besides the well‐known negative refraction, a negative refractive‐index material can exhibit another two hallmark features, which are the inverse Doppler effect and backward Cherenkov radiation. The former is known as the motion‐induced frequency shift that is contrary to the normal Doppler effect, and the latter refers to the Cherenkov radiation whose cone direction is opposite to the source's motion. Here these two features are combined and the Doppler effect inside the backward Cherenkov cone is discussed. It is revealed that the Doppler effect is not always inversed but can be normal in negative refractive‐index systems. A previously un‐reported phenomenon of normal Doppler frequency shift is proposed in a regime inside the backward Cherenkov cone, when the source's velocity is two times faster than the phase velocity of light. A realistic metal–insulator–metal structure, which supports metal plasmons with an effective negative refractive index, is adopted to demonstrate the potential realization of this phenomenon. 2020-05-11T08:29:29Z 2020-05-11T08:29:29Z 2019 Journal Article Lin, X., & Zhang, B. (2019). Normal doppler frequency shift in negative refractive‐index systems. Laser and Photonics Reviews, 13(12), 1900081-. doi:10.1002/lpor.201900081 1863-8880 https://hdl.handle.net/10356/138666 10.1002/lpor.201900081 2-s2.0-85074796133 12 13 en Laser and Photonics Reviews 10.21979/N9/HBE8U3 This is the peer reviewed version of the following article: Lin, X., & Zhang, B. (2019). Normal doppler frequency shift in negative refractive‐index systems. Laser and Photonics Reviews, 13(12), 1900081-. doi:10.1002/lpor.201900081, which has been published in final form at https://doi.org/10.1002/lpor.201900081. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. application/pdf |
| spellingShingle | Science::Physics Cherenkov Radiation Doppler Effect Lin, Xiao Zhang, Baile Normal doppler frequency shift in negative refractive‐index systems |
| title | Normal doppler frequency shift in negative refractive‐index systems |
| title_full | Normal doppler frequency shift in negative refractive‐index systems |
| title_fullStr | Normal doppler frequency shift in negative refractive‐index systems |
| title_full_unstemmed | Normal doppler frequency shift in negative refractive‐index systems |
| title_short | Normal doppler frequency shift in negative refractive‐index systems |
| title_sort | normal doppler frequency shift in negative refractive index systems |
| topic | Science::Physics Cherenkov Radiation Doppler Effect |
| url | https://hdl.handle.net/10356/138666 |
| work_keys_str_mv | AT linxiao normaldopplerfrequencyshiftinnegativerefractiveindexsystems AT zhangbaile normaldopplerfrequencyshiftinnegativerefractiveindexsystems |