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Related Experiment Video

Updated: Jan 30, 2026

Fabrication of Surface Acoustic Wave Devices on Lithium Niobate

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Published on: June 18, 2020

Conversion from terahertz-guided waves to surface waves with metasurface.

Ride Wang, Qiang Wu, Qi Zhang

|January 18, 2019

Summary

This summary is machine-generated.

Researchers achieved terahertz (THz) guided waves (GWs) to surface waves (SWs) conversion using lithium niobate waveguides and metasurface antennas. This breakthrough enhances THz integrated devices and sensing applications.

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Area of Science:

Photonics
Metasurfaces
Terahertz (THz) technology

Background:

Surface waves (SWs) offer subwavelength confinement and manipulation crucial for photonic integrated circuits.
A significant challenge in terahertz (THz) photonics is bridging the gap between guided waves (GWs) and SWs for on-chip applications.

Purpose of the Study:

To implement and demonstrate the conversion of THz GWs to SWs on an integrated platform.
To investigate the dynamic process and underlying physics of THz wave propagation and conversion.

Main Methods:

Coupling of a lithium niobate (LN) subwavelength waveguide with metasurface antennas.
Direct visualization of THz wave conversion and transmission using a time-resolved imaging system.
Analysis of dispersion relations and numerical simulations to understand SW formation and coupling efficiency.

Main Results:

Successful implementation of THz GWs to SWs conversion on an all-feature on-chip platform.
Direct visualization confirmed the conversion process and SW formation, aligning with numerical models.
Maximum coupling efficiency of approximately 62.6% achieved through collective oscillations of the metasurface antenna array.

Conclusions:

The study presents an efficient method for controlling GWs and enabling THz SWs.
This work advances the practicality of THz surface integrated devices, including THz surface spectroscopy sensing.