Reflection second-harmonic microscopy of individual semiconductor microstructures

Bozhevolnyi, Sergey I.; Maidykovski, A. I.; Vohnsen, Brian; Zwiller, Valéry

doi:10.1063/1.1415536

Cited by 10 publications

(3 citation statements)

References 15 publications

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“…For example, the metal−insulator transitions in colloidal Ag nanoparticles and ultrafast phase transitions in GaAs have been observed by monitoring the bulk SHG response. In addition, previous studies of SHG microscopy have elucidated a variety of effects, − including changes in carrier dynamics associated with defects and interfaces.…”

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confidence: 99%

Ultrafast Carrier Dynamics in Single ZnO Nanowire and Nanoribbon Lasers

et al. 2003

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Time-resolved second-harmonic generation (TRSHG) and transient photoluminescence (PL) spectroscopy are utilized to probe the ultrafast creation and subsequent relaxation of excited carriers immediately following band-gap excitation in single ZnO nanowire and nanoribbon lasers. The TRSHG signal consists of a 1−5 ps recovery present only during strong lasing and a 10−80 ps intensity-dependent component. The transient PL response from single structures exhibits an 80 ps decay component independent of pump power (free exciton PL), and a < 10 ps power-dependent component (stimulated emission) that shifts to earlier delay by ca. 10 ps at high pump fluence.

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confidence: 99%

Ultrafast Carrier Dynamics in Single ZnO Nanowire and Nanoribbon Lasers

et al. 2003

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“…SHG microscopy has been successfully used for imaging of periodically poled ferroelectric domains 3,4 , domain structures in epitaxially grown magnetic garnet films 5 , polymer monolayers 6 and polar orientational distribution in thin polymer films 7 . Over recent years, we have successfully employed SH scanning optical microscopy (SHSOM) for imaging of periodically poled ferroelectric domains 8 , domains in polycrystalline metals 9 , poled silica waveguides 10 , semiconductor quantum dots 11 and individual microstructures 12 . The SHSOM apparatus used in these investigations has now been improved with respect to both sample scanning accuracy and pump light focusing.…”

Section: Introductionmentioning

confidence: 99%

Second-harmonic far-field microscopy of random metal nanostructures

2003

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Using a scanning far-field second harmonic (SH) microscope we have excited surface plasmon polaritons (SPPs) on a 70 nm thick gold film surface covered with randomly distributed 80 nm wide gold particles. Multiple scattering of the SPPs by these gold particles leads to localization of the electromagnetic fields causing strongly enhanced and spatially localized SH generation. We investigate wavelength and polarization dependencies of both position and intensity of these SH bright spots for two different densities of random scatterers. Comparing SH and fundamental harmonic (FH) images, we conclude that the localized SH enhancement occurs due to overlap of FH and SH eigenmodes. Furthermore we confirm that for incident laser powers in the range 3-40mW, the bright spots exhibit quadratic intensity dependence. For the higher incident laser powers however, the strong heating of the surface seems to change the material properties causing some bright spots to disappear and others to emerge.

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“…This technique is known for its high contrast and signal-to-noise ratio of images as compared to ordinary SHG microscopy [14,15], as well as providing additional information about structural properties of the samples [16][17][18]. It was demonstrated that application of this technique to microstructures allows one to separate the SHG contributions from different parts of the structure [19].…”

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confidence: 99%

Polarization-resolved second harmonic generation microscopy of chiral G-shaped metamaterials

et al. 2017

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Chiral planar metamaterials are known for their possibility to show strong nonlinear optical effects such as second harmonic generation (SHG) circular dichroism or asymmetric SHG. The underlying mechanisms are commonly discussed in terms of local field effects and formation of localized SHG sources (so called "hotspots") that are sensitive to the shape and size of meta-atoms. Nevertheless, a full characterization of the polarization state of the nonlinear optical radiation from the hotspots has not been performed until now. Here we present the results of the polarization-resolved second harmonic generation microscopy studies of planar chiral G-shaped metamaterials. We demonstrate that the SHG radiation coming from the hotspots that are localized within a single meta-atom is partially polarized; moreover, the SHG polarization state reveals the chirality of the structure. The observed effects are attributed to the induced plasmonic current oscillations at the fundamental frequency along with the local field distribution.

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Reflection second-harmonic microscopy of individual semiconductor microstructures

Cited by 10 publications

References 15 publications

Ultrafast Carrier Dynamics in Single ZnO Nanowire and Nanoribbon Lasers

Ultrafast Carrier Dynamics in Single ZnO Nanowire and Nanoribbon Lasers

Second-harmonic far-field microscopy of random metal nanostructures

Polarization-resolved second harmonic generation microscopy of chiral G-shaped metamaterials

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