New method of control over the phase of an ultrashort electromagnetic pulse under frustrated total internal reflection conditions

Korytin, A. I.; Lavrent’ev, S. A.; Mishakin, S. V.

doi:10.1134/s0021364007190046

Cited by 3 publications

(3 citation statements)

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“…By placing a metallic mirror behind the total reflection plane of the prism, we can change the dielectric environment of the evanescent THz wave, leading to a CEP shift of the THz pulse. With this simple design involving a single mechanical axis, we achieve robust and continuous THz CEP phase control exceeding π/2 along with strong pointing stability 31 (Figure 1a). We used 25 mm right-angle prisms made of poly-(tetrafluoroethylene) (PTFE) and a transparent polymer (Zeonex).…”

Section: ■ Thz Generation and Waveform Samplingmentioning

confidence: 99%

“…Instead, our approach relies on frustrated total internal reflection in a polymer prism using a metallic mirror to change the evanescent coupling. 31 This concept proves as an efficient and cost-effective method for CEP control of THz pulses, enabling continuous modulation between unipolar and bipolar waveforms. It is an enabler for ultrafast scanning tunneling spectroscopy 32 and for perspective experiments where bipolar field transients drive luminescent excitations 33 by generating local excitons.…”

Section: ■ Introductionmentioning

confidence: 96%

“…However, most of these implementations require active mechanical components in the THz path or are incompatible with collinear visible alignment beams. Instead, our approach relies on frustrated total internal reflection in a polymer prism using a metallic mirror to change the evanescent coupling . This concept proves as an efficient and cost-effective method for CEP control of THz pulses, enabling continuous modulation between unipolar and bipolar waveforms.…”

Section: Introductionmentioning

confidence: 99%

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Efficient and Continuous Carrier-Envelope Phase Control for Terahertz Lightwave-Driven Scanning Probe Microscopy

Allerbeck,

Kuttruff,

Bobzien

et al. 2023

ACS Photonics

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The fundamental understanding of quantum dynamics in advanced materials requires precise characterization at the limit of spatiotemporal resolution. Ultrafast scanning tunneling microscopy is a powerful tool combining the benefits of picosecond time resolution provided by single-cycle terahertz (THz) pulses and atomic spatial resolution of a scanning tunneling microscope (STM). For the selective excitation of localized electronic states, the transient field profile must be tailored to the energetic structure of the system. Here, we present an advanced THz-STM setup combining multi-MHz repetition rates, strong THz near fields, and continuous carrier-envelope phase (CEP) control of the transient waveform. In particular, we employ frustrated total internal reflection as an efficient and cost-effective method for precise CEP control of single-cycle THz pulses with >60% field transmissivity, high pointing stability, and continuous phase shifting of up to 0.75 π in the far and near field. Efficient THz generation and dispersion management enable peak THz voltages at the tip–sample junction exceeding 20 V at 1 MHz and 1 V at 41 MHz. The system comprises two distinct THz generation arms, which facilitate individual pulse shaping and amplitude modulation. This unique feature enables the flexible implementation of various THz pump–probe schemes, thereby facilitating the study of electronic and excitonic excited-state propagation in nanostructures and low-dimensional materials systems. Scalability of the repetition rate up to 41 MHz, combined with a state-of-the-art low-temperature STM, paves the way toward the investigation of dynamical processes in atomic quantum systems at their native length and time scales.

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Section: ■ Thz Generation and Waveform Samplingmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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