Presentation Information
[7p-N321-4]Single-shot Broadband Detection of Terahertz Waves in Bulk LN Crystal
〇(D)Gabriel Gandubert1, Joel Edouard Nkeck1, Sota Mine2, Jonathan Lafreniere-Greig1, Kosuke Murate2, Francois Blanchard1 (1.ETS, 2.Nagoya University)
Keywords:
Terahertz,Single-shot,Detector
Terahertz (THz) waves exhibit unique properties in light–matter interactions but remain challenging to detect, even after decades of research. Advancements in this field require faster, more sensitive methods to measure the temporal electric field, which is critical for extracting frequency and phase information.
Recent approaches have achieved near single-photon sensitivity at high speeds, but they often lack phase sensitivity. Without phase information, key parameters such as refractive index and absorption, typically extracted via THz time-domain spectroscopy (THz-TDS), are lost.
To address this, we recently demonstrated a method that uses a poorly phase-matched nonlinear crystal to achieve geometric frequency encoding via spatial separation of modulated probe photons. In this presentation, we extend this concept to demonstrate single-shot detection of the THz electric field's temporal evolution over a >30 ps time window, using both oscillator and amplified laser systems.
Recent approaches have achieved near single-photon sensitivity at high speeds, but they often lack phase sensitivity. Without phase information, key parameters such as refractive index and absorption, typically extracted via THz time-domain spectroscopy (THz-TDS), are lost.
To address this, we recently demonstrated a method that uses a poorly phase-matched nonlinear crystal to achieve geometric frequency encoding via spatial separation of modulated probe photons. In this presentation, we extend this concept to demonstrate single-shot detection of the THz electric field's temporal evolution over a >30 ps time window, using both oscillator and amplified laser systems.