Femtosecond Laser Pulse Driven Caustic Spin Wave Beams

Muralidhar, Shreyas; Khymyn, Roman; Awad, Ahmad A.; Alemán, Ademir; Hanstorp, Dag; Åkerman, Johan

doi:10.1103/physrevlett.126.037204

Cited by 23 publications

(6 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We note that this approach can in principle be used to control propagating spin waves, which is also of great interest from both fundamental science and technological applications [1][2][3][4][5]7,23]. On the other hand, let us mention here that an approach based on a train of fs-laser pulses with a high repetition rate of 1 GHz has been recently used for significant enhancement of the amplitude and narrowing the spectrum for propagating SWs [20,[55][56][57]. Our results predict that using the same approach with a high repetition rate resonant to a SSW mode should similarly allow a very large increase of its amplitude, which can open perspectives towards the generation of large amplitude single SSW mode.…”

Section: Results and Disccussionmentioning

confidence: 99%

Controlling High-Frequency Spin-Wave Dynamics Using Double-Pulse Laser Excitation

Deb

Popova²,

Jaffrès³

et al. 2022

Phys. Rev. Applied

View full text Add to dashboard Cite

Manipulating spin waves is highly required for the development of innovative data transport and processing technologies. Recently, the possibility of triggering high-frequency standing spin waves in magnetic insulators using femtosecond laser pulses was discovered, raising the question about how one can manipulate their dynamics. Here we explore this question by investigating the ultrafast magnetization and spin wave dynamics induced by double-pulse laser excitation. We demonstrate a suppression or enhancement of the amplitudes of the standing spin waves by precisely tuning the time delay between the two pulses. The results can be understood as the constructive or destructive interference of the spin-waves induced by the first and second laser pulses. Our findings open exciting perspectives towards generating singlemode standing spin waves that combine high frequency with large amplitude and low magnetic damping.

show abstract

Section: Results and Disccussionmentioning

confidence: 99%

Controlling High-Frequency Spin-Wave Dynamics Using Double-Pulse Laser Excitation

Deb

Popova²,

Jaffrès³

et al. 2022

Phys. Rev. Applied

View full text Add to dashboard Cite

show abstract

“…Эта работа дала толчок для целого ряда исследований СВ, возбуждаемых в различных материалах под действием света. В частности, о применении оптических методик для полностью оптического возбуждения и детектирования магнитостатических СВ в металлах сообщалось для тонких пленок пермаллоя [105][106][107][108][109], CoFeB [110] и сплавов Гейслера [111][112][113]. Механизмом возбуждения при этом являлся процесс сверхбыстрого размагничивания за счет нагрева (см.…”

Section: оптическое возбуждение спиновых волнunclassified

“…Также упомянем гибридные методики, когда возбуждение СВ производится напрямую СВЧ полем без изменения магнитных параметров материала, а детектирование реализовано оптическими методами -МБРС или МО микроскопии с временным разрешением [126,127]. А в недавних работах [105,109] впервые были совмеще-Журнал технической физики, 2021, том 91, вып. 12 ны резонансное возбуждение СВ фс лазером с частотой следования импульсов 1 GHz и детектирование волн методом МБРС.…”

Section: экспериментальная методика накачка-зондирование с пространственным разрешениемunclassified

“…Работа [128] дала толчок к исследованию распространения магнитостатических СВ в металлических пленках [105][106][107][108][109][110][111][112][113]. Однако во всех этих работах возбуждающим механизмом для СВ являлось изменение анизотропии формы при сверхбыстром размагничивании.…”

Section: сверхбыстрое изменение магнитной анизотропии и возбуждение свunclassified

See 1 more Smart Citation

Сверхбыстрое Лазерно-Индуцированное Управление Магнитной Анизотропией Наноструктур

Калашникова¹,

Хохлов²,

Шелухин³

et al. 2021

Журнал Технической Физики

View full text Add to dashboard Cite

Employing short laser pulses with a duration below 100 fs for changing magnetic state of magnetically-ordered media has developed into a distinct branch of magnetism —femtomagnetism which aims at controlling magnetization at ultimately short timescales. Among plethora of femtomagnetic phenomena, there is a class related to impact of femtosecond pulses on magnetic anisotropy of materials and nanostructures which defines orientation of magnetization, magnetic resonance frequencies and spin waves propagation. We present a review of main experimental results obtained in this field. We consider basic mechanisms responsible for a laser-induced change of various anisotropy types: magnetocrystalline, magnetoelastic, interfacial, shape anisotropy, and discuss specifics of these processes in magnetic metals and dielectrics. We consider several examples and describe features of magnetic anisotropy changes resulting from ultrafast laser-induced heating, impact of laser-induced dynamic and quasistatic strains and resonant excitation of electronic states. We also discuss perspectives of employing various mechanisms of laser-induced magnetic anisotropy change for enabling processes prospective for developing devices. We consider precessional magnetization switching for opto-magnetic information recording, generation of high-frequency strongly localized magnetic excitations and fields for magnetic nanotomography and hybrid magnonics, as well as controlling spin waves propagation for optically-reconfigurable magnonics. We further discuss opportunities which open up in studies of ultrafast magnetic anisotropy changes because of using short laser pulses in infrared and terahertz ranges.

show abstract

“…those induced by illuminating a magnetic structure with light, are of particular interest since they allow creating reconfigurable magnonic elements [22][23][24]. Furthermore, changing magnetic properties of a medium locally by femtosecond laser pulses appears to be one of the efficient ways to generate propagating spin waves and to tune their characteristics [25][26][27][28][29][30]. Therefore, it is appealing to realize a tunable source of SW by combining the advantages of ultrafast laser-induced excitation of SW with their control by local magnetic defects, such as domain walls.…”

Section: Introductionmentioning

confidence: 99%

Néel domain wall as a tunable filter for optically excited magnetostatic waves

Khokhlov,

Khramova,

Filatov

et al. 2021

Preprint

View full text Add to dashboard Cite

We present a concept of a tunable optical excitation of spin waves and filtering their spectra in a ferromagnetic film with 180 • Néel domain wall. We show by means of micromagnetic simulation that the fluence and position of the femtosecond laser pulse affect the frequencies of the excited spin waves, and the presence of the domain wall plays crucial role in controlling the spin waves' spectrum. The predicted effects are understood by analyzing the changes of the spin waves' dispersion under the impact of the laser pulse.

show abstract

Femtosecond Laser Pulse Driven Caustic Spin Wave Beams

Cited by 23 publications

References 47 publications

Controlling High-Frequency Spin-Wave Dynamics Using Double-Pulse Laser Excitation

Controlling High-Frequency Spin-Wave Dynamics Using Double-Pulse Laser Excitation

Сверхбыстрое Лазерно-Индуцированное Управление Магнитной Анизотропией Наноструктур

Néel domain wall as a tunable filter for optically excited magnetostatic waves

Contact Info

Product

Resources

About