High-power photoconductive THz emitters for fast parallel electro-optic detection

Abstract

The terahertz (THz) region is highly attractive for imaging because it penetrates many optically opaque materials and can distinguish them by composition. Among the various methods that allow us to access this spectral region, THz time-domain spectroscopy (THz-TDS) is uniquely suited to retrieve broadband information, recording the full waveform of the THz electric field to recover both amplitude and phase with high sensitivity. Translating this capability into fast, wide-field imaging has however remained a major challenge, largely because the low average power of conventional TDS sources forces a trade-off between acquisition speed, field of view, and sensitivity. Here we demonstrate a hyperspectral THz camera in which a high-average-power, pulsed broadband THz source, delivering 38.3 mW at a 400 kHz repetition rate, drives parallel electro-optic detection over a wide field of view at high acquisition rates. The system simultaneously records the full THz waveform, in amplitude and phase, across 145,000 pixels over a ~14.5 mm field of view at an acquisition rate of 2 Hz. These results demonstrate the potential of high-average-power THz-TDS for broadband, high-speed imaging, opening applications such as inline material-resolved inspection and the spectroscopic imaging of irreversible, second-timescale processes such as hydration in biologically relevant systems.

Dual-Function Organic Emitters for Plastic Scintillators Enabled by Integration of Photocatalytic Controlled Radical Polymerization and Sensitive X-Ray Detection
Hong Chen, Guangli He, Ziyu Cui +7
ChemRxiv27 Oct 2026PreprintCC BYFull textApplied physics & instrumentationChemRxiv
10 kV β-Ga₂O₃ Sub-Bandgap Triggered Impurity Photoconductive Semiconductor Switches (i-PCSSs): Lessons for Optimal Design
Imteaz Rahaman, Hunter Ellis, Afrouz Taherian +5
arXiv29 Oct 2026PreprintCC BY 4.0Full textCondensed matterarXiv
When Measurement Constraints Favor Quantum Computational Sensing for Stealthy Power-Grid Attack Detection
Saisubramaniam Gopalakrishnan, Supreeth B S, Pranav Sarda +2
arXiv8 Sep 2026PreprintCC BY-NC-SA 4.0Full textQuantum physics & quantum informationarXiv
Non-Markovian delay-assisted sensing with waveguide-coupled quantum emitters
Prajit Dhara, Isack Padilla, Saikat Guha +2
Physical Review Research23 Oct 2026Peer-reviewedPublisher termsOptics & photonicsCrossrefAPS
Rayleigh Backscattering Reflectometry using Incoherent Frequency-Modulated Continuous Wave and Bidirectional Electro-Optic Modulation
Miguel Cuenca, Haroldo Maestre Vicente, Carlos Fernandez-Pousa
Optics Express15 Oct 2026Peer-reviewedLicence not statedOptics & photonicsCrossref

Cite

BibTeX RIS

BibTeX

@misc{khalili2026highpower,
  title = {{High-power photoconductive THz emitters for fast parallel electro-optic detection}},
  author = {Mohsen Khalili and Robin Löscher and Anna Martinez and Abhishek Singh and Stephan Winnerl and Clara J. Saraceno},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.00744},
  eprint = {2610.00744},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.00744},
  note = {CC BY 4.0},
}

RIS

TY  - UNPB
TI  - High-power photoconductive THz emitters for fast parallel electro-optic detection
AU  - Mohsen Khalili
AU  - Robin Löscher
AU  - Anna Martinez
AU  - Abhishek Singh
AU  - Stephan Winnerl
AU  - Clara J. Saraceno
PY  - 2026
DA  - 2026/10/01
PB  - arXiv
DO  - 10.48550/arxiv.2610.00744
UR  - https://arxiv.org/abs/2610.00744
AB  - The terahertz (THz) region is highly attractive for imaging because it penetrates many optically opaque materials and can distinguish them by composition. Among the various methods that allow us to access this spectral region, THz time-domain spectroscopy (THz-TDS) is uniquely suited to retrieve broadband information, recording the full waveform of the THz electric field to recover both amplitude and phase with high sensitivity. Translating this capability into fast, wide-field imaging has however remained a major challenge, largely because the low average power of conventional TDS sources forces a trade-off between acquisition speed, field of view, and sensitivity. Here we demonstrate a hyperspectral THz camera in which a high-average-power, pulsed broadband THz source, delivering 38.3 mW at a 400 kHz repetition rate, drives parallel electro-optic detection over a wide field of view at high acquisition rates. The system simultaneously records the full THz waveform, in amplitude and phase, across 145,000 pixels over a ~14.5 mm field of view at an acquisition rate of 2 Hz. These results demonstrate the potential of high-average-power THz-TDS for broadband, high-speed imaging, opening applications such as inline material-resolved inspection and the spectroscopic imaging of irreversible, second-timescale processes such as hydration in biologically relevant systems.
ER  -

Abstract

Related

Cite