Sub-cycle measurement of intensity correlations in the Terahertz range

Abstract

The Terahertz frequency range bears intriguing opportunities, beyond very advanced applications in spectroscopy and matter control. Peculiar quantum phenomena are predicted to lead to light emission by non-trivial mechanisms. Typically, such emission mechanisms are unraveled by temporal correlation measurements of photon arrival times, as demonstrated in their pioneering work by Hanbury Brown and Twiss. So far, the Terahertz range misses an experimental implementation of such technique with very good temporal properties and high sensitivity. In this paper, we propose a room-temperature scheme to measure photon correlations at THz frequencies based on electro-optic sampling. The temporal resolution of 146 fs is faster than one cycle of oscillation and the sensitivity is so far limited to ~1500 photons. With this technique, we measure the photon statistics of a THz quantum cascade laser. The proposed measurement scheme allows, in principle, the measurement of ultrahigh bandwidth photons and paves the way towards THz quantum optics.

References in corpus (7)

• Network of Time-Multiplexed Optical Parametric Oscillators as a Coherent Ising Machine
• Detecting arbitrary quantum errors via stabilizer measurements on a sublattice of the surface code
• Ultrafast single-nanowire multi-terahertz spectroscopy with sub-cycle temporal resolution
• Octave-spanning semiconductor laser
• Schemes for the observation of photon correlation functions in circuit QED with linear detectors
• Nonclassical Radiation from Thermal Cavities in the Ultrastrong Coupling Regime
• High quality factor, fully switchable THz superconducting metasurface

Cited by in corpus (13)

• Ultrastrong coupling regimes of light-matter interaction
• Electric field correlation measurements on the electromagnetic vacuum state
• Subcycle Quantum Electrodynamics
• Detection of quantum-vacuum field correlations outside the light cone
• Subcycle squeezing of light from a time flow perspective
• A quantum optical description of photon statistics and cross-correlations in high harmonic generation
• Enhanced Electro-Optic Sampling with Quantum Probes
• Intensity autocorrelation measurements of quantum cascade laser frequency combs in the Terahertz range
• Unidimensional Time Domain Quantum Optics
• THz ultra-strong light-matter coupling up to 200K with continuously-graded parabolic quantum wells
• Output squeezed radiation from dispersive ultrastrong light-matter coupling
• Electro-Optical Sampling of Single-Cycle THz Fields with Single-Photon Detectors
• Quantifying the amplitudes of ultrafast magnetization fluctuations in Sm${}_{0.7}$Er${}_{0.3}$FeO${}_3$ using femtosecond noise correlation spectroscopy