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https://hdl.handle.net/10356/170387
Title: | Electrically tunable topological notch filter for THz integrated photonics | Authors: | Gupta, Manoj Kumar, Abhishek Singh, Ranjan |
Issue Date: | 2023 | Source: | Gupta, M., Kumar, A. & Singh, R. (2023). Electrically tunable topological notch filter for THz integrated photonics. Advanced Optical Materials. https://dx.doi.org/10.1002/adom.202301051 | Project: | NRF-CRP23-2019-0005 | Journal: | Advanced Optical Materials | Abstract: | Electromagnetic filtering is essential for emerging integrated photonic technologies and widely adaptable processing of high-bandwidth signals. The conventional electro-optic modulator-based photonic approach for signal filtering at microwave frequencies cannot be implemented at terahertz (THz) frequencies due to the unavailability of the THz signal-driven optical modulator. Here, an electrically tunable on-chip THz photonic notch filter based on the topologically protected valley hall waveguide-cavity platform is demonstrated. The device shows a significantly large notch suppression depth of more than 20 dB with a return loss of 13 dB in the entire tuning range of notch frequency. The feedback control circuit enables precise control of the notch frequency shift with a minimum step size of 7 MHz. This work extends the application of topological photonic crystals in developing THz-integrated photonic devices for transformative technologies, including sixth-generation (6G) communication and high-resolution spectral sensing. | URI: | https://hdl.handle.net/10356/170387 | ISSN: | 2195-1071 | DOI: | 10.1002/adom.202301051 | DOI (Related Dataset): | 10.21979/N9/GVCVO0 | Schools: | School of Physical and Mathematical Sciences | Research Centres: | Centre for Disruptive Photonic Technologies (CDPT) The Photonics Institute |
Rights: | © 2023 Wiley-VCH GmbH. All rights reserved. This is the peer reviewed version of the following article: Gupta, M., Kumar, A. & Singh, R. (2023). Electrically tunable topological notch filter for THz integrated photonics. Advanced Optical Materials, which has been published in final form at https://doi.org/10.1002/adom.202301051. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
Appears in Collections: | SPMS Journal Articles |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
THz_Notch_filter_manuscript_Dr NTU.pdf | Manuscript | 999.03 kB | Adobe PDF | View/Open |
THz_Notch_Supplimentary_Dr NTU.pdf | Supplementary Information | 1.11 MB | Adobe PDF | View/Open |
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