Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi

Berlin, Germany

Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi

Berlin, Germany

Time filter

Source Type

Derrien T.J.-Y.,BAM Federal Institute of Materials Research and Testing | Kruger J.,BAM Federal Institute of Materials Research and Testing | Itina T.E.,CNRS Hubert Curien Laboratory | Hohm S.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | And 2 more authors.
Optics Express | Year: 2013

The formation of near-wavelength laser-induced periodic surface structures (LIPSS) on silicon upon irradiation with sequences of Ti:sapphire femtosecond laser pulse pairs (pulse duration 150 fs, central wavelength 800 nm) is studied theoretically. For this purpose, the nonlinear generation of conduction band electrons in silicon and their relaxation is numerically calculated using a two-temperature model approach including intrapulse changes of optical properties, transport, diffusion and recombination effects. Following the idea that surface plasmon polaritons (SPP) can be excited when the material turns from semiconducting to metallic state, the "SPP active area" is calculated as function of fluence and double-pulse delay up to several picoseconds and compared to the experimentally observed rippled surface areas. Evidence is presented that multi-photon absorption explains the large increase of the rippled area for temporally overlapping pulses. For longer double-pulse delays, relevant relaxation processes are identified. The results demonstrate that femtosecond LIPSS on silicon are caused by the excitation of SPP and can be controlled by temporal pulse shaping. © 2013 Optical Society of America.


Hohm S.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Rosenfeld A.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Kruger J.,BAM Federal Institute of Materials Research and Testing | Bonse J.,BAM Federal Institute of Materials Research and Testing
Journal of Applied Physics | Year: 2012

The formation of laser-induced periodic surface structures (LIPSS) on two different silica polymorphs (single-crystalline synthetic quartz and commercial fused silica glass) upon irradiation in air with multiple linearly polarized single- and double-fs-laser pulse sequences (τ 150 fs pulse duration, λ 800 nm center wavelength, temporal pulse separation Δt 40 ps) is studied experimentally and theoretically. Two distinct types of fs-LIPSS [so-called low-spatial-frequency LIPSS (LSFL) and high-spatial-frequency LIPSS (HSFL)] with different spatial periods and orientations were identified. Their appearance was characterized with respect to the experimental parameters peak laser fluence and number of laser pulses per spot. Additionally, the dynamics of the LIPSS formation was addressed in complementary double-fs-pulse experiments with varying delays, revealing a characteristic change of the LSFL periods. The experimental results are interpreted on the basis of a Sipe-Drude model considering the carrier dependence of the optical properties of fs-laser excited silica. This new approach provides an explanation of the LSFL orientation parallel to the laser beam polarisation in silica-as opposed to the behaviour of most other materials. © 2012 American Institute of Physics.


Hohm S.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Herzlieb M.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Rosenfeld A.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Kruger J.,BAM Federal Institute of Materials Research and Testing | Bonse J.,BAM Federal Institute of Materials Research and Testing
Applied Physics Letters | Year: 2013

The formation of laser-induced periodic surface structures (LIPSS) upon irradiation of fused silica with multiple irradiation sequences consisting of laser pulse pairs (50 fs single-pulse duration) of two different wavelengths (400 and 800 nm) is studied experimentally. Parallel polarized double-pulse sequences with a variable delay Δt between -10 and +10 ps and between the individual fs-laser pulses were used to investigate the LIPSS periods versus Δt. These two-color experiments reveal the importance of the ultrafast energy deposition to the silica surface by the first laser pulse for LIPSS formation. The second laser pulse subsequently reinforces the previously seeded spatial LIPSS frequencies. © 2013 AIP Publishing LLC.


Hohm S.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Rosenfeld A.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Kruger J.,BAM Federal Institute of Materials Research and Testing | Bonse J.,BAM Federal Institute of Materials Research and Testing
Applied Physics Letters | Year: 2013

The formation of laser-induced periodic surface structures (LIPSS) on fused silica upon irradiation with linearly polarized fs-laser pulses (50 fs pulse duration, 800 nm center wavelength) is studied experimentally using a transillumination femtosecond time-resolved (0.1 ps-1 ns) pump-probe diffraction approach. This allows to reveal the generation dynamics of near-wavelength- sized LIPSS showing a transient diffraction at specific spatial frequencies even before a corresponding permanent surface relief was observed. The results confirm that the ultrafast energy deposition to the materials surface plays a key role and triggers subsequent physical mechanisms such as carrier scattering into self-trapped excitons. © 2013 American Institute of Physics.


Hohm S.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Rosenfeld A.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Kruger J.,BAM Federal Institute of Materials Research and Testing | Bonse J.,BAM Federal Institute of Materials Research and Testing
Applied Surface Science | Year: 2013

The formation of laser-induced periodic surface structures upon irradiation of titanium, silicon, and fused silica with multiple irradiation sequences consisting of parallel polarized Ti:sapphire femtosecond laser pulse pairs (pulse duration 50-150 fs, central wavelength ∼800 nm) is studied experimentally. The temporal delay between the individual near-equal energy fs-laser pulses was varied between 0 and 5 ps with a temporal resolution of better than 0.2 ps. The surface morphology of the irradiated surface areas is characterized by means of scanning electron microscopy (SEM). In all materials a decrease of the rippled surface area is observed for increasing delays. The characteristic delay decay scale is quantified and related to material dependent excitation and energy relaxation processes. © 2012 Elsevier B.V.


Bonse J.,BAM Federal Institute of Materials Research and Testing | Kruger J.,BAM Federal Institute of Materials Research and Testing | Hohm S.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Rosenfeld A.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi
Journal of Laser Applications | Year: 2012

The formation of laser-induced periodic surface structures (LIPSS) in different materials (metals, semiconductors, and dielectrics) upon irradiation with linearly polarized fs-laser pulses (τ ∼ 30-150 fs, λ ∼ 800 nm) in air environment is studied experimentally and theoretically. In metals, predominantly low-spatial-frequency-LIPSS with periods close to the laser wavelength λ are observed perpendicular to the polarization. Under specific irradiation conditions, high-spatial-frequency-LIPSS with sub-100-nm spatial periods (∼λ10) can be generated. For semiconductors, the impact of transient changes of the optical properties to the LIPSS periods is analyzed theoretically and experimentally. In dielectrics, the importance of transient excitation stages in the LIPSS formation is demonstrated experimentally using (multiple) double-fs-laser-pulse irradiation sequences. A characteristic decrease of the LIPSS periods is observed for double-pulse delays of less than 2 ps. © 2012 Laser Institute of America.


Hohm S.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Rohloff M.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Rosenfeld A.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Kruger J.,BAM Federal Institute of Materials Research and Testing | Bonse J.,BAM Federal Institute of Materials Research and Testing
Applied Physics A: Materials Science and Processing | Year: 2013

The formation of laser-induced periodic surface structures (LIPSS) upon irradiation of fused silica and silicon with multiple (NDPS) irradiation sequences consisting of linearly polarized femtosecond laser pulse pairs (pulse duration ∼150 fs, central wavelength ∼800 nm) is studied experimentally. Nearly equal-energy double-pulse sequences are generated allowing the temporal pulse delay Δt between the cross-polarized individual fs-laser pulses to be varied from -40 ps to +40 ps with a resolution of ∼0.2 ps. The surface morphologies of the irradiated surface areas are characterized by means of scanning electron and scanning force microscopy. Particularly for dielectrics in the sub-ps delay range striking differences in the orientation and spatial characteristics of the LIPSS can be observed. For fused silica, a significant decrease of the LIPSS spatial periods from ∼790 nm towards ∼550 nm is demonstrated for delay changes of less than ∼2 ps. In contrast, for silicon under similar irradiation conditions, the LIPSS periods remain constant (∼760 nm) for delays up to 40 ps. The results prove the impact of laser-induced electrons in the conduction band of the solid and associated transient changes of the optical properties on fs-LIPSS formation. © Springer-Verlag 2012.


Bonse J.,BAM Federal Institute of Materials Research and Testing | Hohm S.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Rosenfeld A.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Kruger J.,BAM Federal Institute of Materials Research and Testing
Applied Physics A: Materials Science and Processing | Year: 2013

The formation of laser-induced periodic surface structures (LIPSS) on titanium upon irradiation with linearly polarized femtosecond (fs) laser pulses (τ = 30 fs, λ = 790 nm) in an air environment is studied experimentally and theoretically. In the experiments, the dependence on the laser fluence and the number of laser pulses per irradiation spot has been analyzed. For a moderate number of laser pulses (N <1000) and at fluences between ∼0.09 and ∼0.35 J/cm2, predominantly low-spatial-frequency-LIPSS with periods between 400 nm and 800 nm are observed perpendicular to the polarization. In a narrow fluence range between 0.05 and 0.09 J/cm2, high-spatial-frequency-LIPSS with sub-100-nm spatial periods (∼λ/10) can be generated with an orientation parallel to the polarization (N = 50). These experimental results are complemented by calculations based on a theoretical LIPSS model and compared to the present literature. © Springer-Verlag 2012.


Hohm S.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Rosenfeld A.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Kruger J.,BAM Federal Institute of Materials Research and Testing | Bonse J.,BAM Federal Institute of Materials Research and Testing
Optics Express | Year: 2015

Single- and two-color double-fs-pulse experiments were performed on titanium to study the dynamics of the formation of laserinduced periodic surface structures (LIPSS). A Mach-Zehnder interferometer generated polarization controlled (parallel or cross-polarized) double-pulse sequences in two configurations - either at 800 nm only, or at 400 and 800 nm wavelengths. The inter-pulse delays of the individual 50-fs pulses ranged up to some tens of picoseconds. Multiple of these single- or two-color double-fs-pulse sequences were collinearly focused by a spherical mirror to the sample surface. In both experimental configurations, the peak fluence of each individual pulse was kept below its respective ablation threshold and only the joint action of both pulses lead to the formation of LIPSS. Their resulting characteristics were analyzed by scanning electron microscopy and the periods were quantified by Fourier analyses. The LIPSS periods along with the orientation allow a clear identification of the pulse which dominates the energy coupling to the material. A plasmonic model successfully explains the delay-dependence of the LIPSS on titanium and confirms the importance of the ultrafast energy deposition stage for LIPSS formation. © 2015 Optical Society of America.


Hohm S.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Herzlieb M.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Rosenfeld A.,Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi | Kruger J.,BAM Federal Institute of Materials Research and Testing | Bonse J.,BAM Federal Institute of Materials Research and Testing
Optics Express | Year: 2015

Two-color double-fs-pulse experiments were performed on silicon wafers to study the temporally distributed energy deposition in the formation of laser-induced periodic surface structures (LIPSS). A Mach- Zehnder interferometer generated parallel or cross-polarized double-pulse sequences at 400 and 800 nm wavelength, with inter-pulse delays up to a few picoseconds between the sub-ablation 50-fs-pulses. Multiple two-color double-pulse sequences were collinearly focused by a spherical mirror to the sample. The resulting LIPSS characteristics (periods, areas) were analyzed by scanning electron microscopy. A wavelength-dependent plasmonic mechanism is proposed to explain the delay-dependence of the LIPSS. These two-color experiments extend previous single-color studies and prove the importance of the ultrafast energy deposition for LIPSS formation. © 2015 Optical Society of America.

Loading Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi collaborators
Loading Max Born Institute For Nichtlineare Optik Und Kurzzeitspektroskopie Mbi collaborators