Microwave Tunneling and Robust Information Transfer Based on Parity-Time-Symmetric Absorber-Emitter Pairs
Robust signal transfer in the form of electromagnetic waves is of fundamental importance in modern technology, yet its operation is often challenged by unwanted modifications of the channel connecting transmitter and receiver. Parity-time- (PT-) symmetric systems, combining active and passive elemen...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Association for the Advancement of Science (AAAS)
2019-01-01
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| Series: | Research |
| Online Access: | http://dx.doi.org/10.34133/2019/7108494 |
| _version_ | 1797287452869656576 |
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| author | Zhicheng Xiao Younes Ra’di Sergei Tretyakov Andrea Alù |
| author_facet | Zhicheng Xiao Younes Ra’di Sergei Tretyakov Andrea Alù |
| author_sort | Zhicheng Xiao |
| collection | DOAJ |
| description | Robust signal transfer in the form of electromagnetic waves is of fundamental importance in modern technology, yet its operation is often challenged by unwanted modifications of the channel connecting transmitter and receiver. Parity-time- (PT-) symmetric systems, combining active and passive elements in a balanced form, provide an interesting route in this context. Here, we demonstrate a PT-symmetric microwave system operating in the extreme case in which the channel is shorted through a small reactance, which acts as a nearly impenetrable obstacle, and it is therefore expected to induce large reflections and poor transmission. After placing a gain element behind the obstacle, and a balanced lossy element in front of it, we observe full restoration of information and overall transparency to an external observer, despite the presence of the obstacle. Our theory, simulations, and experiments unambiguously demonstrate stable and robust wave tunneling and information transfer supported by PT symmetry, opening opportunities for efficient communication through channels with dynamic changes, active filtering, and active metamaterial technology. |
| first_indexed | 2024-03-07T18:34:18Z |
| format | Article |
| id | doaj.art-9e5d7c86a27b4fa2ac903be18aa2e668 |
| institution | Directory Open Access Journal |
| issn | 2639-5274 |
| language | English |
| last_indexed | 2024-03-07T18:34:18Z |
| publishDate | 2019-01-01 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | Article |
| series | Research |
| spelling | doaj.art-9e5d7c86a27b4fa2ac903be18aa2e6682024-03-02T05:26:30ZengAmerican Association for the Advancement of Science (AAAS)Research2639-52742019-01-01201910.34133/2019/7108494Microwave Tunneling and Robust Information Transfer Based on Parity-Time-Symmetric Absorber-Emitter PairsZhicheng Xiao0Younes Ra’di1Sergei Tretyakov2Andrea Alù3Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX 78712, USADepartment of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX 78712, USA; Advanced Science Research Center, City University of New York, New York, NY 10031, USADepartment of Electronics and Nanoengineering, Aalto University, FI-00076 Aalto, FinlandDepartment of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX 78712, USA; Advanced Science Research Center, City University of New York, New York, NY 10031, USARobust signal transfer in the form of electromagnetic waves is of fundamental importance in modern technology, yet its operation is often challenged by unwanted modifications of the channel connecting transmitter and receiver. Parity-time- (PT-) symmetric systems, combining active and passive elements in a balanced form, provide an interesting route in this context. Here, we demonstrate a PT-symmetric microwave system operating in the extreme case in which the channel is shorted through a small reactance, which acts as a nearly impenetrable obstacle, and it is therefore expected to induce large reflections and poor transmission. After placing a gain element behind the obstacle, and a balanced lossy element in front of it, we observe full restoration of information and overall transparency to an external observer, despite the presence of the obstacle. Our theory, simulations, and experiments unambiguously demonstrate stable and robust wave tunneling and information transfer supported by PT symmetry, opening opportunities for efficient communication through channels with dynamic changes, active filtering, and active metamaterial technology.http://dx.doi.org/10.34133/2019/7108494 |
| spellingShingle | Zhicheng Xiao Younes Ra’di Sergei Tretyakov Andrea Alù Microwave Tunneling and Robust Information Transfer Based on Parity-Time-Symmetric Absorber-Emitter Pairs Research |
| title | Microwave Tunneling and Robust Information Transfer Based on Parity-Time-Symmetric Absorber-Emitter Pairs |
| title_full | Microwave Tunneling and Robust Information Transfer Based on Parity-Time-Symmetric Absorber-Emitter Pairs |
| title_fullStr | Microwave Tunneling and Robust Information Transfer Based on Parity-Time-Symmetric Absorber-Emitter Pairs |
| title_full_unstemmed | Microwave Tunneling and Robust Information Transfer Based on Parity-Time-Symmetric Absorber-Emitter Pairs |
| title_short | Microwave Tunneling and Robust Information Transfer Based on Parity-Time-Symmetric Absorber-Emitter Pairs |
| title_sort | microwave tunneling and robust information transfer based on parity time symmetric absorber emitter pairs |
| url | http://dx.doi.org/10.34133/2019/7108494 |
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