Monolithic Terahertz Topological Mach-Zehnder Interferometer

© 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 37(2025), 37 vom: 01. Sept., Seite e2505657
1. Verfasser: Navaratna, Nikhil (VerfasserIn)
Weitere Verfasser: Tan, Yi Ji, Wang, Wenhao, Singh, Ranjan
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2025
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article Active on‐chip terahertz Mach‐Zehnder Interferometer Phase control Topological waveguides on‐chip terahertz topological Mach‐Zehnder Interferometer photonic topological insulators terahertz silicon photonics terahertz topological photonic integrated circuits valley photonic crystals
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520 |a The pursuit of on-chip electromagnetic wave control for high throughput communication, spectroscopy, and quantum computing underlies the motivation for terahertz photonic integrated circuitry. Recent breakthroughs in topological photonics have enabled the development of chips that harness topologically resilient interface modes to achieve area and performance efficiency. However, the demonstration of a compact, monolithic topological Mach-Zehnder interferometer (MZI), remains a critical gap. In this work, a terahertz topological MZI is presented, exhibiting six interferometric fringes across a 17 GHz bandwidth, with splitter, combiner, and arms integrated on a single chip. The interferometric fringes exhibiting high on-off contrast with extinction ratios over 20 dB are achieved by utilizing tailored unit cells that facilitate interface-dependent out-of-plane radiation losses. Active tuning of the MZI response is also demonstrated through photoexcitation of the MZI arms. The presented approach is the first step toward realizing topological photonic modulators that leverage the phase degree of freedom for photonic integrated communication and quantum information processing 
650 4 |a Journal Article 
650 4 |a Active on‐chip terahertz Mach‐Zehnder Interferometer 
650 4 |a Phase control 
650 4 |a Topological waveguides 
650 4 |a on‐chip terahertz topological Mach‐Zehnder Interferometer 
650 4 |a photonic topological insulators 
650 4 |a terahertz silicon photonics 
650 4 |a terahertz topological photonic integrated circuits 
650 4 |a valley photonic crystals 
700 1 |a Tan, Yi Ji  |e verfasserin  |4 aut 
700 1 |a Wang, Wenhao  |e verfasserin  |4 aut 
700 1 |a Singh, Ranjan  |e verfasserin  |4 aut 
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