In this work, we demonstrate a metal-wire-based plasmonic signal processor, which can simultaneously act as a broadband terahertz polarization-division multiplexer and as a novel platform to realize the independent manipulation of polarization-division multiplexed terahertz signals. Such a device opens up new exciting perspectives for exploiting the polarization degree of freedom and ultimately boosting the capacity and spectral efficiency of future terahertz networks.
We demonstrate a single-shot ultrafast terahertz photography system that can capture multiple frames of a complex ultrafast scene in non-transparent media with sub-picosecond temporal resolutions. By multiplexing an optical probe beam in the time and spatial-frequency domains simultaneously, we encode the terahertz-captured spatiotemporal dynamics into distinct spatial-frequency regions of a multiplexed image, which is then computationally decoded and reconstructed.
By taking advantage of the characteristic sensitivity of terahertz radiation to the water content in biological tissues, we demonstrate the application of terahertz imaging for simultaneous monitoring of nanoparticle-assisted laser-tissue interaction and three-dimensional visualization of the photothermal damage induced by laser therapy.
We demonstrate a single-shot ultrafast terahertz imaging system, by multiplexing an optical probe beam in both the time and spatial-frequency domains, which can capture multiple frames of an optically-opaque transient scene with sub-picosecond temporal resolutions.
In this work, we demonstrate a single-shot ultrafast terahertz imaging system that can capture multiple frames of a complex ultrafast scene in non-transparent media with sub-picosecond temporal resolutions. By multiplexing an optical probe beam in the time and spatial-frequency domains simultaneously, we encode the terahertz-captured spatiotemporal dynamics into distinct spatial-frequency regions of a superimposed image, which is then computationally decoded and reconstructed. Our technique provides a new diagnostic tool for the investigation of non-repeatable or destructive ultrafast phenomena that occur in optically-opaque scenarios.
We demonstrate a new metal-wire waveguide topology, namely a four-wire waveguide, which simultaneously acts as a broadband terahertz polarization-division multiplexer and a novel platform to realize the independent manipulation of polarization-division multiplexed terahertz signals.
In modern medicine, wound healing remains a very complex process where the main goal is to achieve a fast regeneration matched to an aesthetically satisfactory appearance. In particular, reducing the wound healing time and minimizing tissue scarring are important requirements. In view of minimally-invasive clinical interventions, nanoparticle-assisted laser tissue soldering is emerging as an appealing concept in surgical medicine due to its ability to facilitate wound healing while avoiding sutures. However, such a therapy has not been employed in clinical settings yet. The underlying reason is the fact that rapid elevation in temperature can cause significant photothermal tissue damage. Therefore, cutting-edge diagnostic tools are indispensable in order to monitor the temperature in tissue and achieve satisfactory healing results. To this end, we propose a non-invasive, non-contact, and non-ionizing modality for monitoring nanoparticle-assisted laser-tissue interaction and visualizing the localized photothermal damage, by taking advantage of the unique sensitivity of terahertz radiation to the hydration level of biological tissue. We demonstrate that terahertz imaging can be employed as a versatile tool to monitor the temperature variations and reveal the thermally affected evolution in tissue. In particular, terahertz imaging is able to provide quantitative information along the depth direction, in turn allowing us to characterize the photothermal damage induced by nanoparticle-assisted laser tissue soldering in three dimensions. Our approach can be easily extended and applied across a broad range of clinical applications associated with laser-tissue interactions, such as laser ablation and photothermal therapies.
Real-time imaging of ultrashort events on picosecond timescales has proven pivotal in unveiling various fundamental mechanisms in physics, chemistry, and biology. Current single-shot ultrafast imaging schemes operate only at conventional optical wavelengths, being suitable solely within an optically transparent framework. Here, leveraging on the unique penetration capability of terahertz radiation, we demonstrate a single-shot ultrafast imaging system that can capture multiple frames of a complex ultrafast scene in non-transparent media with sub-picosecond temporal resolutions. By multiplexing an optical probe beam in both the time and spatial-frequency domains, we encode the terahertz-captured dynamics into distinct spatial-frequency regions of a multiplexed optical image, which is then computationally decoded and reconstructed. Our approach opens up the investigation of non-repeatable or destructive events that occur in optically-opaque scenarios.
We demonstrate a new metal-wire waveguide topology, namely a four-wire waveguide, which simultaneously acts as a broadband terahertz polarization-division multiplexer and a novel platform to realize the independent manipulation of polarization-division multiplexed terahertz signals.
Multidimensional imaging of transient events has proven pivotal in unveiling many fundamental mechanisms in physics, chemistry, and biology. In particular, real-time imaging modalities with ultrahigh temporal resolutions are required for capturing ultrashort events on picosecond timescales. Despite recent approaches witnessing a dramatic boost in high-speed photography, current single-shot ultrafast imaging schemes operate only at conventional optical wavelengths, being suitable solely within an optically-transparent framework. Here, leveraging on the unique penetration capability of terahertz radiation, we demonstrate a single-shot ultrafast terahertz photography system that can capture multiple frames of a complex ultrafast scene in non-transparent media with sub-picosecond temporal resolution. By multiplexing an optical probe beam in both the time and spatial-frequency domains, we encode the terahertz-captured three-dimensional dynamics into distinct spatial-frequency regions of a superimposed optical image, which is then computationally decoded and reconstructed. Our approach opens up the investigation of non-repeatable or destructive events that occur in optically-opaque scenarios.
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