Generation of frequency-chirped optical pulses with FELIX

Knippels, G.M.H.; Meer, A. F. G. van der; Mols, R.F.X.A.M.; Oepts, D.; Amersfoort, P.W. van

doi:10.1016/0168-9002(96)00059-9

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2018

Publication Types

Select...

Article1

Other1

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Efficient excitation of nonlinear phonons via chirped pulses: Induced structural phase transitions

Itin

Katsnelson

2018

Phys. Rev. B

View full text Add to dashboard Cite

Nonlinear phononics play important role in strong laser-solid interactions. We discuss a dynamical protocol for efficient phonon excitation, considering recent inspiring proposals: inducing ferroelectricity in paraelectric material such as KTaO3, and inducing structural deformations in cuprates (e.g La2CuO4) [A. Subedi et.al, Phys.Rev. B 89, 220301 (2014), Phys.Rev. B 95, 134113 (2017]. High-frequency phonon modes are driven by mid-infrared pulses, and coupled to lower-frequency modes those indirect excitation causes structural deformations. We study in a more detail the case of KTaO3 without strain, where (at first glance) it was not possible to excite the needed low frequency phonon mode by resonant driving of the higher frequency one. Behaviour of the system is explained using a reduced model of coupled driven nonlinear oscillators. We find a dynamical mechanism which prevents effective excitation at resonance driving. In order to induce ferroelectricity we employ driving with sweeping frequency, realizing so called capture into resonance. The method works for realistic femtosecond pulses and can be applied to many other related systems.

show abstract