Carrier envelope phase shifter for broadband terahertz pulses

Area of Science:

• Physics
• Optics
• Terahertz Science

Background:

• The carrier envelope phase (CEP) is crucial for ultrashort pulse interactions with matter.
• Controlling the CEP of terahertz (THz) pulses is essential for advanced applications.

Purpose of the Study:

• To demonstrate a method for controlled shifting of the internal phase of broadband THz pulses.
• To develop and validate a novel CEP shifter for THz radiation.

Main Methods:

• Utilized the ultra-broadband characteristics of prism wave plates for CEP shifting.
• Analytically derived the achievable CEP shift using Jones matrix formalism.
• Performed THz time-domain measurements to verify the CEP shift.

Main Results:

• Successfully demonstrated controlled shifting of the carrier envelope phase (CEP) of broadband THz pulses.
• Experimental results showed excellent agreement with analytically derived values.
• Achieved a maximum CEP shift of 2π, allowing for arbitrary CEP selection.

Conclusions:

• The developed CEP shifter effectively controls the carrier envelope phase of THz pulses.
• The device enables selection of any desired CEP value.
• This technology opens new avenues for THz-based light-matter interaction studies.