All-Optical Modulation of Localized Surface Plasmon Coupling in a Hybrid System Composed of Photo-Switchable Gratings and Au Nanodisk Arrays.

We conduct a real-time study of all-optical modulation of localized surface plasmon resonance (LSPR) coupling in a hybrid system that integrates a photo-switchable optical grating with a gold nanodisk array. This hybrid system enables us to investigate two important interactions: 1) LSPR-enhanced grating diffraction, and 2) diffraction-mediated LSPR in the Au nanodisk array. The physical mechanism underlying these interactions was analyzed and experimentally confirmed.

Photorefractive crystal-based holographic interferometry system for full-field wave propagation metrology.

Although, photorefractive materials have been discovered for many years, research using pulsed laser as the light source and photorefractive material as the recording media to record a pulsed laser hologram have been scarce despite its vast application potential. A newly proposed optical configuration which adopts a Nd:YAG pulsed laser of 532nm wavelength as the light source and uses an iron-doped lithium niobate crystal as the recording media for holographic recording of an un-deformed specimen is presented. Real-time holographic interferometry was achieved by inducing repetitive impacts on the specimen through a precise piezoelectric impact hammer.