Title:  Chipscale Terahertz Topological Photonics for 6G Communications

Presenter:  Dr. Manoj Gupta, Postdoctoral Research Fellow at the Center for Disruptive Photonic Technologies (CDPT), Nanyang Technological University, Singapore.

Date:  16th November 2022

Time: 5:00 (PM)

Short bio of the Speaker:  

Dr. Manoj Gupta is currently leading the terahertz 6G communication (TERACOMM) initiative as a Postdoctoral Research Fellow at the Center for Disruptive Photonic Technologies (CDPT), Nanyang Technological University, Singapore. He received his Ph.D. in terahertz metamaterial photonics from Nanyang Technological University, Singapore, in January 2019. He is innovating next-generation on-chip terahertz devices for 6G wireless communications. In 2007, he received his B.Tech degree in Electrical Engineering from the Indian Institute of Technology, Roorkee. His current research interests include (a) terahertz electronic-photonic hybrid technologies for 6G communications, (b) THz topological photonics, (c) THz time-domain spectroscopy, and (d) graphene-integrated THz metamaterial devices. He has published 19 peer-reviewed journal articles, which include publications in high-impact journals (Nature Communication, Nature Electronics, Advanced Materials). His works can be found on google scholar (hyperlinked text).

Abstract of the talk:

Global digitalization and the recent rise of artificial intelligence-based data-driven applications have directed their vectors towards terabits per second (Tbps) communication links. The fast-evolving 5G communication network cannot fulfill this demand due to several technological challenges, including bandwidth scarcity, which has stimulated innovative technologies with a vision of 6G communication. Terahertz (THz) technologies have been identified as a critical candidate for the emerging 6G communication with the potential to provide ubiquitous connectivity and remove the barrier between the physical, digital, and biological worlds. Nonetheless, the existing THz photonic on-chip communication devices suffer from backscattering, bending loss, limited data speed, and lack of active tunability. Here, I would discuss on-chip waveguide-based frequency division multiplexing (FDM) as one of the potential methods to harness the potential of the THz band by allowing multiple broadband communication channels to operate simultaneously at speeds exceeding 100 Gbit/s. Topological bandgap engineering in the inversion-symmetry broken Valley-Hall Photonic Crystal (VPC) interconnects, where seamless transport of photons at the edge states occurs at the domain walls, playing an important role in harnessing the THz band through high-speed photonic devices. I will also discuss our recent works on topological terahertz devices, which includes a cavity, filters, waveguides, interconnects, multiplexer and demultiplexer, with demonstrations on on-chip waveguides and diplexer devices that support aggregate data speed-up to 160 Gbit/s. Finally, my talk will provide a global roadmap towards achieving terabit per second data rates for realizing 6G and the 7G communication era with THz carrier.

We look forward to seeing you there!