Metallic slit arrays filled with third-order nonlinear media: Optical Kerr effect and third-harmonic generation

Rodrigo, Sergio G.; Carretero‐Palacios, Sol; García‐Vidal, F. J.; Martín‐Moreno, Luis

doi:10.1103/physrevb.83.235425

Cited by 15 publications

(11 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are a number of papers in this field tackling the problems of magneto-optics [6][7][8], opto-acoustics [9,10], and plasmonics [11][12][13], often extending the experimental approaches into the nonlinear domain [14] or employing time-resolved techniques [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Femtosecond laser-induced optical anisotropy in a two-dimensional lattice of magnetic dots

et al. 2014

View full text Add to dashboard Cite

Using pump-probe optical polarimetry we demonstrate that femtosecond laser excitation of a 2D regular lattice of magnetic nanodots effectively changes the optical anisotropy of the array. Study of the dynamics of the femtosecond laser-induced anisotropy reveals four main mechanisms occurring in the electronic, spin, and lattice subsystems. Below 1 ps, a strong Kerr-like nonlinearity causes linear birefringence, with its axis directed along the electric field of the linearly polarized femtosecond laser pump pulse. In addition, a long-living linear birefringence is also induced due to slowly relaxing excitations. Also below 1 ps, ultrafast laser-induced demagnetization of Co leads to a partial breakdown of the circular birefringence of the magnetic nanodots. On the timescale up to 300 ps, optically triggered acoustic modes of the dots drive oscillations of the linear optical birefringence. During this process, the oscillations damp while transferring their energy into acoustic modes of the substrate. On the nanosecond timescale, the signal is dominated by acoustic oscillations at the surface of the substrate.

show abstract

Section: Introductionmentioning

confidence: 99%

Femtosecond laser-induced optical anisotropy in a two-dimensional lattice of magnetic dots

et al. 2014

View full text Add to dashboard Cite

show abstract

“…6(e)e(h) show the local change of the refractive index inside the slits marked by dashed rectangular box. The increase of the refractive index produces a redshift of resonant wavelength in the linear spectrum [8]. Here we use the Kerr coefficient n 2 ¼ 1.7x10 -4 cm 2 /GW, so that Dn ¼ n 2 I is the refractive index change due to the applied incident intensity.…”

Section: Optical Switching/bistability Operationsmentioning

confidence: 99%

Surface plasmon-assisted optical switching/bistability at telecommunication wavelengths in nonlinear dielectric gratings

Hoang

Ngo

2015

Current Applied Physics

View full text Add to dashboard Cite

“…3 of [36]. For a detailed explanation about the planewave source conditions and the method to calculate scattering coefficients, see [44]. The whole system is on a glass substrate (n glass 1.5).…”

Section: Far-field Emission At Second-harmonic: General Propertiesmentioning

confidence: 99%

“…This is the case of an array of holes drilled in a metal film, a nanostructured system that has been widely investigated in the linear regime especially since the discovery of extraordinary optical transmission (EOT) [33]. Taking advantage of the strong electromagnetic (EM) fields found in holey films, several attempts have been conducted to exploit their nonlinear response for harmonic generation [34][35][36][37][38][39][40][41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

Second-harmonic generation from metallic arrays of rectangular holes

2014

Self Cite

View full text Add to dashboard Cite

The generation process of second-harmonic radiation from holes periodically arranged on a metal surface is investigated. Three main modulating factors affecting the far-field distribution and the transmission efficiency are identified: the near-field distribution at the wavelength of the driving source (fundamental harmonic), how second-harmonic light couples to the diffraction orders of the lattice, and its propagation properties inside the holes. It is shown that light generated at the second harmonic can excite electromagnetic modes otherwise inaccessible in the linear regime under normal incidence illumination, a singularity of second-harmonic fields that affects the radiation process. For instance, the least decaying transversal electric TE 0;1 mode accessible to the external beam is able to generate a superposition of high-order modes (TE 1;1 and TM 1;1 ) at the second harmonic. It is demonstrated that the emission of second-harmonic radiation is only allowed along off-normal paths precisely due to that symmetry. In this work, two different regimes are studied in the context of extraordinary optical transmission, where enhanced linear transmission either occurs through localized electromagnetic modes or is aided by surface plasmon polaritons (SPPs). While localized resonances in metallic hole arrays have been previously investigated, the role played by surface plasmons in second-harmonic generation has not been addressed so far. In general, good agreement is found between our calculations (based on the finite difference time domain method) and the experimental results on localized resonances, even though no free-fitting parameters were used in describing the materials. It is found that second-harmonic emission is strongly modulated by enhanced fields at the fundamental wavelength (either localized or surface plasmon modes) on the glass-metal interface. This is so in the transmission side but also in reflection, where emission can only be explained by an efficient tunneling of secondharmonic photons through the holes from the output to the input side. Finally, the existence of a dark SPP at the fundamental field is identified through a noninvasive method for the first time, by analyzing the efficiency and far-field pattern distribution in transmission at the second harmonic.

show abstract

Metallic slit arrays filled with third-order nonlinear media: Optical Kerr effect and third-harmonic generation

Cited by 15 publications

References 25 publications

Femtosecond laser-induced optical anisotropy in a two-dimensional lattice of magnetic dots

Femtosecond laser-induced optical anisotropy in a two-dimensional lattice of magnetic dots

Surface plasmon-assisted optical switching/bistability at telecommunication wavelengths in nonlinear dielectric gratings

Second-harmonic generation from metallic arrays of rectangular holes

Contact Info

Product

Resources

About