Fractional Echoes

Abstract

We report the observation of fractional echoes in a double-pulse excited nonlinear system. Unlike standard echoes which appear periodically at delays which are integer multiple of the delay between the two exciting pulses, the fractional echoes appear at rational fractions of this delay. We discuss the mechanism leading to this phenomenon, and provide the first experimental demonstration of fractional echoes by measuring third harmonic generation in a thermal gas of CO2 molecules excited by a pair of femtosecond laser pulses.

References in corpus (3)

• Beam by design: laser manipulation of electrons in modern accelerators
• Orientation and Alignment Echoes
• Echoes and revival echoes in systems of anharmonically confined atoms

Cited by in corpus (13)

• Quantum control of molecular rotation
• Echo Spectroscopy in multi-level quantum-mechanical rotors
• All-optical measurement of high-order fractional molecular echoes by high-order harmonic generation
• Observing collisions beyond the secular approximation limit
• Echo in a Single Molecule
• Molecular alignment echoes probe collision-induced rotational-speed changes
• Echoes in Unidirectionally Rotating Molecules
• Echo-enhanced molecular orientation at high temperatures
• Intrinsic Calibration of Molecular Alignment Using Rotational Echoes
• Echoes in a Single Quantum Kerr-nonlinear Oscillator
• Impulsively Excited Gravitational Quantum States: Echoes and Time-resolved Spectroscopy
• Visualizing coherent molecular rotation in a gaseous medium
• Echoes in a parametrically perturbed Kerr-nonlinear oscillator