Laser driven quantum rings: one byte logic gate implementation

Area of Science:

• Quantum Optics
• Attosecond Science
• Condensed Matter Physics

Background:

• High harmonic generation (HHG) is a key process for producing extreme ultraviolet and X-ray radiation.
• The carrier-envelope-phase (CEP) of driving lasers plays a crucial role in nonlinear optical phenomena.
• Quantum rings are promising systems for exploring electron dynamics under intense laser fields.

Purpose of the Study:

• To investigate the influence of CEP on HHG from a quantum ring.
• To explore the control of harmonic intensity and spectral cut-off by laser parameters.
• To analyze electron dynamics and identify mechanisms for cut-off harmonics.

Main Methods:

• Numerical simulation of HHG from a quantum ring driven by two orthogonal, phase-controlled lasers.
• Wavelet analysis of emitted harmonic spectra.
• Time-dependent analysis of electron angular momentum and energy.

Main Results:

• Varying the CEP of one laser allows precise control over the intensity of emitted harmonics.
• Efficient HHG is achieved when the y-polarized laser is weak.
• The spectral cut-off is tunable by adjusting the CEP and intensity ratio of the two lasers.
• Electron dynamics reveal distinct angular momentum variations correlating with cut-off harmonics and distinct temporal pulses.

Conclusions:

• CEP control offers a powerful tool for tailoring HHG spectra from quantum rings.
• The identified electron dynamics provide insights into the generation of cut-off harmonics.
• These findings pave the way for potential applications in ultrafast information processing and quantum technologies.