Half-cycle and unipolar pulses (Topical Review)

Архипов, Р. М.; Архипов, М. В.; Пахомов, А. В.; Babushkin, Ihar; Rosanov, N. N.

doi:10.1088/1612-202x/ac5522

Cited by 43 publications

(32 citation statements)

References 64 publications

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“…( 4), with the CEP being 𝜃 d = 0, which leaves a finite vector potential 𝐴 f ∝ cos 𝜃 d after 𝐸 d (𝜏) decays. While the existence of such a unipolar (i.e., 𝐴 f ≠ 0) pulse is controversial [109][110][111][112], here by introducing a CEP-controlled mono-cycle driving pulse we show that energy-band echoes can be obtained even for 𝐴 f = 0.…”

Section: E Optical Driving Pulsementioning

confidence: 92%

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Energy-band echoes: Time-reversed light emission from optically driven quasiparticle wavepackets

Imai¹,

Ono²,

Ishihara³

2022

Preprint

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The at-will control of quantum states is a primary goal of quantum science and technology. The celebrated Hahn echo exemplifies such quantum-state control based on a time-reversal process in a few-level system. Here, we propose a different echo phenomenon associated with the energy-band structure in quantum many-body systems. We show that the dynamics of quasiparticle wavepackets can be reversed by a driving electric-field pulse, yielding echoes with the time-reversed waveform of the optical excitation pulse when the quasiparticles recombine. The present echoes are observed not only in band insulators but also in correlated insulators, including a Mott insulator and a spontaneously-broken-symmetry charge-ordered insulator, in one-and higherdimensional systems, irrespective of the integrability of the models. Analytical expressions reveal the conditions under which the echoes appear, and they also indicate that the frequency of the echo pulses reflects the dispersion relation for quasiparticles such as electron-hole pairs, doublon-holon pairs, and kink-antikink pairs. These findings provide a framework for all-optical momentum-resolved spectroscopy of the quasiparticles in quantum many-body systems.

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Section: E Optical Driving Pulsementioning

confidence: 92%

“…Hereafter, we discuss the energy-band echo with 𝜃 d = 0, which facilitates the analysis. We note that the existence of such a unipolar pulse with 𝐴 f ≠ 0 is controversial [109][110][111][112]; we demonstrate in Sec. III E that the echoes can be generated even by a driving pulse with 𝜃 d = 𝜋/2; i.e., 𝐴 f = 0.…”

Section: A Numerical Simulationmentioning

confidence: 99%

Energy-band echoes: Time-reversed light emission from optically driven quasiparticle wavepackets

Imai¹,

Ono²,

Ishihara³

2022

Preprint

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“…Более подробно о последних результатов в данной области см. обзоры [9][10][11] и цитируемую литературу.…”

Section: Introductionunclassified

“…Если длительность такого полупериодного импульса много меньше характерного времени, связанного с внутриатомными движениями электрона в атоме (например, орбитального периода электрона в атоме или характерного времени, связаного с энергией основного состояния, T g = 2π /E 1 , где E 1 -энергия частицы в основном состоянии), то воздействие такого импульса на микрообъект определяется электрической площадью импульса, а не его энергией [10][11][12][13][14][15].…”

Section: Introductionunclassified

Генерация Униполярных Импульсов Терагерцового Излучения С Большой Электрической Площадью

Архипов,

Розанов

2022

Оптика И Спектроскопия

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A physical situation is proposed and theoretically analyzed, in which, in our opinion, it is possible to generate unipolar terahertz pulses with a large electric area. In this case, the gas in the tube is excited by a femtosecond IR laser pulse. In this case, the tube with gas is placed in a constant external electric field. The generation of a unipolar pulse is based on ”three-step scheme" - ionization of gas atoms by a femtosecond pulse, subsequent acceleration of a free electron in a dc external field and subsequent annihilation of an electron upon collision with a tube wall or another atom (ion).

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“…Но получаемые на практике сверхкороткие фемто-и аттосекундные импульсы содержат несколько циклов колебаний [1][2][3][4]. Предельной возможностью сокращения длительности световых импульсов является генерация одноцикловых импульсов, содержащих две полуволны поля противоположной полярности [12,13]. Если обрезать одну из полуволн, то получается униполярный полуцикловый импульс, содержащий одну полуволну поля и обладающий ненулевой электрической площадью.…”

Section: Introductionunclassified

Особенности Поведения Волн Поляризации При Возбуждении Протяженной Резонансной Среды Перекрывающимися Предельно Короткими Световыми Импульсами

Архипов¹,

Архипов²,

Розанов³

2022

Оптика И Спектроскопия

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With the coherent interaction of a sequence of extremely short light pulses with a resonant medium (when the duration of the pulses and the delays between them are shorter than the relaxation times of the population difference T1 and polarization T2 of the medium), it is possible to create spatial electromagnetically induced gratings (EMIG) of polarization and population difference in the medium, as well as their ultrafast control. The dynamics of such gratings is of interest in connection with the possibility of ultrafast control over the properties of a medium at times of the order of the pulse duration and their influence on the stability of generation of extremely short pulses in a laser with a short linear cavity. In this paper, based on the numerical solution of the system of Maxwell-Bloch equations, an unusual and interesting possibility of the appearance of narrow and alternating sections in the medium is shown and studied in detail, in which harmonic polarization waves of the medium are formed, propagating in opposite directions relative to neighboring sections. This situation occurs when two extremely short attosecond pulses collide in a two-level resonant medium.

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Half-cycle and unipolar pulses (Topical Review)

Cited by 43 publications

References 64 publications

Energy-band echoes: Time-reversed light emission from optically driven quasiparticle wavepackets

Energy-band echoes: Time-reversed light emission from optically driven quasiparticle wavepackets

Генерация Униполярных Импульсов Терагерцового Излучения С Большой Электрической Площадью

Особенности Поведения Волн Поляризации При Возбуждении Протяженной Резонансной Среды Перекрывающимися Предельно Короткими Световыми Импульсами

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