Localized Surface Plasmon Resonances Dominated Giant Lateral Photovoltaic Effect

The lateral photovoltaic effect(LPE)has been widely employed in the position sensitive detectors where precisely autocontrol measurement is necessary owing to its its linear relation between the instant electrical signal output and the laser spot position illuminated on the hybrid structure surface.On this account,series of jobs recently have been carried out aiming to seek much more reasonable systems which could present with better sensitivity and higher linearity.As we have known that noble metal nanostructures can generate strong localized surface plasmon resonances(LSPRs)in the visible range since its dielectric constant has a large negative real part and a relatively small imaginary part.These peculiar metallic LSPRs are found to exhibit intensely nonlinear optical phenomenon and distinctively electronic transport properties because of the distinguished localization and enhancement of the electric and magnetic fields.Hence,we put forward a novel blending nanostructure ZnO/Ag/Si(substrate)presented with a sensitivity performance several times of the control sample,where the intermediate Ag semicontinuous film can trigger abundant localized plasmon excitations(hot spots)and arouse strong resonance of the local field with the incident optical field in the visible and near-infrared range.This work suggests a brand new LSPRs approach for tailoring LPE-based devices and also opens avenues of research within current photoelectric sensors area.In this paper,chapter one showed a general view of the recent researches in LPE and LSPRs included the property and application.Chapter two sequentially introduced a couple of representative theories of the LPE,the LSPs in quasi-static approximation and how can the resonance field energy dissipate in three modes as well as the numerical simulation method of finite difference time domain(FDTD).Chapter three presented the details of preparation and detection of all the samples.Chapter four made systemic analysis of the measured results,proposed the LSPRs based LPE mechanism and performed a numerical simulation with FDTD.In the last chapter,we made a conclusion and a future outlook of this research.