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            <funder>Authors acknowledge the research funding support from National Research Foundation (NRF) Singapore, Grant: TERACOMM, NRF-CRP23-2019-0005. This research/project is also supported by the National Research Foundation, Singapore and Infocomm Media Development Authority under its Future Communications Research &amp; Development Programme (FCP-NTU-RG-2022-014) We thank the IEMN characterization service (CHOP platform) for the access to various instruments and infrastructure support used during the VNA characterization steps of the different samples. The test of experimental testbed was supported by the Renatech+ Network under the Nano-Futur program. The THz communication testbed itself is supported by the CPER Wavetech @ HdF, and by the ANR projects (ANR-22-PEEL-0006 and ANR-22-PEFT-0006), funded under the France 2030 programs: PEPR Electronics and 5G/Future networks)</funder>
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              <p>Photonic diplexers are being widely investigated for high data transfer rates in on‐chip communication. However, dividing the available spectrum into non‐overlapping multicarrier frequency sub‐bands has remained a challenge in designing frequency‐selective time‐invariant channels. Here, we report an on‐chip topological diplexer exhibiting terahertz frequency band filtering through Klein tunnelling of topological edge modes. The silicon topological diplexer chip facilitates two high‐speed channels with quadrature amplitude modulation (QAM) over a broad bandwidth of 12.5 GHz each. These channels operate at carrier frequencies of 305 GHz and 321.6 GHz, achieving a combined diplexer capacity of 150 Gbit/s. To ensure minimal interference between adjacent channels, a guard band is implemented. Topologically protected edge modes suppress the frequency selective fading of the broadband signals and hold promise for diverse integrated photonic applications spanning terahertz and telecommunication realms, including the design of lossless topological multiplexers, interconnects, antennas, and modulators for the sixth to X generation (6G to XG) wireless. This article is protected by copyright. All rights reserved</p>
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          <idno type="anr">ANR-22-PEFT-0006</idno>
          <orgName>NF-SYSTERA</orgName>
          <desc>Devices and SYStems enabling Ultra High Data-rates links in sub-TERAhertz</desc>
          <date type="start">2022</date>
        </org>
      </listOrg>
    </back>
  </text>
</TEI>