Thin-film lithium niobate terahertz differential field detectors with a bandwidth reaching 3 terahertz.

ABSTRACT: Broadband and sensitive detection of terahertz (THz) radiation is critical for advances in fields like telecommunications, spectroscopy, and quantum physics. We present a compact and high-performance THz field detector based on resonant THz antennas printed along near-infrared waveguides on thin-film lithium-niobate. These antennas were shown to have their peak response between 250 GHz to 1 THz, depending on their geometry, while the non-resonant nature of the interaction enables THz detection to be achieved up to 3 THz. We show that combining two such antennas in an integrated Mach Zehnder interferometer allows for a measurement of the discrete time derivative of the THz waveform, while using a single antenna measures the instantaneous derivative of the field. Using this approach, we have

SUBMITTER: Herter A 

PROVIDER: S-EPMC12500990 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature