Session Index

We experimentally demonstrate the voltage modulation of plasmonic nanolasers on graphene-insulator-metal (GIM) platform at room temperature. The threshold and peak position of lasing peak could be tuned by gate voltage. The diminishing of lasing intensity, and the wavelength shifts of peak positions were observed when the applied voltage was changed.

 

Dual-phase two-color emissions of multilayered GaTe positioned at 1.588 and 1.652 eV are simultaneously detected by micro-photoluminescence measurement at 300 K. The lower-energy peak may originate from the hexagonal GaTe (H-GaTe) phase while the higher-energy luminescence might come from monoclinic GaTe (M-GaTe) phase and which are verified by micro-thermoreflectance and HRTEM. TRPL and AFLM of the multilayer GaTe indicated that the averaged decay lifetime of the H-GaTe is larger than that of the M-GaTe. Polarized micro-Raman and polarized micro-PL measurements shows that M-GaTe has higher extinction ratio and lower symmetry than that H-GaTe.

 

Metasurfaces have attracted great interest because of their ability to control the amplitude, phase, and polarization of electromagnetic waves. In this study, we first demonstrate emission angle covering ±20° × ±20° from a metasurface-integrated PCSELs array with a very compact size.

 

In this study, the proposed phase gratings are fabricated by the uniform lying helix (ULH) textures of cholesteric liquid crystals (CLCs). With the characteristics of LCs, an electrically tunable phase grating is realizable under ULH textures. Besides, the effect of the LC dimer, CB7CB, to ULH textures is investigated.

 

In this study, we demonstrate the High-Contrast Grating(HCG) that fabricated on the semipolar substrate with aluminum deposition shown better polarization control ability and achieved degree of polarization(DOP) value to 0.75. Compare to the p-type gallium grating and nonstructural devices, the grating with aluminum deposition shows the best performance of measurement and simulation.

 

We demonstrate a dual-wavelength guided mode resonance (GMR) filter based a holographic-defined moiré waveguide grating structure. As-realized GMR filter exhibits two resonant wavelengths (561 and 632 nm) for TE-polarized light.

 

Vanadium dioxide (VO2) is one of promising Phase change materials (PCMs) presenting the insulator-metal transition (IMT) with strong contrast in physical properties, low critical temperature, ultra-fast transition and continuously tunable characteristic. In our work, we apply VO2 onto ITO glass as a memory layer so as to develop a novel approach to quantify the correlation between IMT behavior and the geometry-dependent Joule-heating effect. The demonstration of two-terminals memory device provides a new way for nanophotonics and advanced optoelectronics device. Notably, this approach also reveals the significance of thermal engineering for efficiently obtaining phase transition of VO2.

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