Photonic band-edge assisted enhanced nonlinear absorption of carbon encapsulated gold nanostructures in polymeric multilayers

Impact of Photonic Band Edge Enabled Slow Light Effect on Optical Limiting Activity of Graphene Quantum Dots in All Polymer 1-D Photonic Crystals

“…The algorithm was implemented in MATLAB using the fast Fourier transform technique. From the plots, it is obvious that at the vicinity of the PBE, the dispersion curve shows a sharp peak, which confirms the slow light effect and leads to an improved light–matter interaction. , The group velocity of a material can be expressed as V g = (dω/d k ), where d k and dω are the derivatives of wavenumber and angular frequency, respectively. The group index refraction is given by (eq ) n normalg = c normald k normald ω = n + ω normald n normald ω where n is the linear refractive index of the medium.…”

“…On the other hand, by introducing highly dispersive PhC, one can control the group velocity significantly, and that makes this structure more suitable than other dispersive materials. 6 NLO active materials that exhibit a decrease in transmittance with increased input fluence are known as optical limiters. These materials play a crucial part in shielding fragile and sensitive optical components from hazardous laser beams.…”

“…Even though they offer ultra-compact size scale properties appropriate for the photonic application, they have limitations like small damage threshold and sizable ohmic losses . Completely dielectric nanostructures are receiving special attention for photonic device applications as a substitute for the plasmonic system due to their small intrinsic loss and the existence of localized modes with a large Q -factor . Photonic crystals (PhCs) are the most renowned example for this category, as they can modify and improve different optical properties through bandgap engineering …”

Nonlinear Optical Studies of [Pt17(CO)12(PPh3)8]n+ Metal Nanoclusters and Their Enhancement via All-Plastic Photonic Crystal Cavity

“…The large field amplitude created inside the structure due to the confinement of light in the defect layer enhanced the nonlinear absorption properties of the Pt 17 nanoclusters. This can be correlated to the optical density of states which gets modified due to intense light–matter interaction . The bare polymer host film was also checked at various energies ranging from 0.069 to 1.38 GW/cm 2 for any contribution in the absorptive nonlinearity, and no required signature was found in these intensities (Supporting Information Figure c).…”

“…This can be correlated to the optical density of states which gets modified due to intense light−matter interaction. 57 The bare polymer host film was also checked at various energies ranging from 0.069 to 1.38 GW/cm 2 for any contribution in the absorptive nonlinearity, and no required signature was found in these intensities (Supporting Information Figure 1c). From the optical limiting studies conducted on the PhC cavity and the Pt 17 reference at 0.27 GW/cm 2 , the fabricated Pt 17 :PhC cavity is found to display excellent optical limiting behavior with the limiting threshold value dropping to 1.007 J/cm 2 , and the onset fluence is found to be 0.06 J/cm 2 (Figure 6c).…”