Work

Determination of the time origin by the maximum entropy method in time-domain terahertz emission spectroscopy

Year: 2010

Type: article

Abstract: We have developed a scheme for determining the time origin by the maximum entropy method (MEM) in time-domain terahertz (THz) emission spectroscopy. By applying the MEM to trial damped sinusoidal waveforms, we confirmed that the MEM gives true phase shifts across the resonance features and that its inherent uncertainty in determining the time origin is +/-15 fs for 100-fs-class excitation/sampling optical pulses. Furthermore, when the MEM was applied to a THz waveform recorded experimentally with a finite sampling interval for the Bloch oscillation in a semiconductor superlattice, a misplacement of the time origin was indeed detected with an accuracy limited by the worse of the MEM inherent uncertainty and the sampling interval.

Source: Optics Express

DOI: 10.1364/oe.18.015853

Authors: Takeya Unuma, Yusuke Ino, Makoto Kuwata-Gonokami, Erik M. Vartiainen, Kai-Erik Peiponen, Kazuhiko Hirakawa

Institutions: Institute of Industrial Science, The University of Tokyo, The University of Tokyo, Lappeenranta-Lahti University of Technology, University of Eastern Finland

Language: English

Topic: Terahertz technology and applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

OpenAlex ID: W1982687775

FWCI: 0.98

Cites: 18

Cited by: 17

Related to: 10