G shape

Second harmonic generation (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

hotspots(Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

gold nanostructure (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

designates regions where the electromagnetic energy is fighly concentrated (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

attracted a lot of attention(Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

because they can lead to extreme enlargement of molecular optical response (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

example

Ramman signal (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

effectively mapping plasmonic hotspots while effectively filtering the unwanted signal (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

The processes whereby two photons at the frequency of illumination are converted into a single photon at the douuble frequency (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

forbidden in centrosymmetric (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

Symmetry is broken at surfaces and interfaces of materials (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

Symmetry is broken by externally applied electric or magnetic dc field(Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

spherical shape is also centrosymmetric (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

hot spot (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

Experimental work

nanowires

plasmonic coupling between nanostructures (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

gold nanoparticle

molecular binding (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

chain nanoparticles

support propagating plasmons (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

SHG

direct coupling (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

possible retardation effect (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

chain particle (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

can support propagating plasmons (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

possible retardation effect (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

direct coupling (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

over resolution limit (Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures)

nanobump and nanojet

circular dichroism (A Study of Chirality in Gold Nanostructures with Second Harmonic Generation) (Polarization Properties Of SHG From Chiral G-shaped Nanostructures)

a nonlinear optica technique with demonstrate sensitivity at the molecular level for both surfaces and interfaces (A Study of Chirality in Gold Nanostructures with Second Harmonic Generation)

capable of distinguishing between left or right handed molecules (A Study of Chirality in Gold Nanostructures with Second Harmonic Generation)

a sensitivity that is much greater than that of linear probrs (A Study of Chirality in Gold Nanostructures with Second Harmonic Generation)

asymmetric transmission (Anisotropy versus circular dichroism in second harmonic generation from fourfold symmetric arrays of G-shaped nanostructures) (Circular dichroism in optical second harmonic generated in reﬂection from chiral G-shaped metamaterials) ((A Study of Chirality in Gold Nanostructures with Second Harmonic Generation)) (Polarization Properties Of SHG From Chiral G-shaped Nanostructures)((Plasmonic Ratchet Wheels: SwitchingCircular Dichroism by Arranging Chiral Nanostructures))

experiement

(A Study of Chirality in Gold Nanostructures with Second Harmonic Generation)

(Polarization Properties Of SHG From Chiral G-shaped Nanostructures)

Review (Characterization of Nanostructured Plasmonic Surfaces with Second Harmonic Generation)

(Circular dichroism in optical second harmonic generated in reﬂection from chiral G-shaped metamaterials)

(Anisotropy versus circular dichroism in second harmonic generation from fourfold symmetric arrays of G-shaped nanostructures)

(Plasmonic Ratchet Wheels: SwitchingCircular Dichroism by Arranging Chiral Nanostructures)

Chiral

non chiral

microscopy (Linearly polarized second harmonic generation microscopy reveals chirality )