Xiang Lü

Construction of a chiral metamaterial with a U-shaped resonator assembly

In an assembly of double-layered metallic U-shaped resonators with two resonant frequencies

Modulated photoluminescence spectroscopy with a step-scan Fourier transform infrared spectrometer

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Surface-plasmon-enhanced transmission through metallic film perforated with fractal-featured aperture array

and

Photoreflectance spectroscopy with a step-scan Fourier-transform infrared spectrometer: Technique and applications

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Backside-illuminated infrared photoluminescence and photoreflectance: Probe of vertical nonuniformity of HgCdTe on GaAs

, the effective induced electric and magnetic dipoles, which originate from the specific distribution of induced surface electric current upon the illumination of incident light, are collinear at the same frequency. Consequently, for left circularly polarized incident light, negative refractive index occurs at

Infrared photoluminescence of arsenic-doped HgCdTe in a wide temperature range of up to 290 K

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Lattice thermal conductivity in a silicon nanowire with square cross section

, whereas for right circularly polarized incident light it occurs at

Lattice thermal conductivity of Si nanowires: Effect of modified phonon density of states

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Photomodulated infrared spectroscopy by a step-scan Fourier transform infrared spectrometer

. We suggest that this design provides a new example to apply chiral structures to tune the electromagnetic properties, and could be enlightening in exploring chiral metamaterials.

Thermal conductivity modeling of copper and tungsten damascene structures

Fourier transform infrared (FTIR) spectrometer is a powerful tool for studying the photoluminescence (PL) properties of semiconductors, due to its well-known multiplexing and throughput advantages. However, it suffers from internal He–Ne laser disturbance in near-infrared and∕or environmental background thermal emission in mid- and far-infrared spectral regions. In this work, a modulated PL technique is developed based on step-scan (SS)-FTIR spectrometer. Theoretical analysis is conducted, and applications of the technique are given as examples in the PL study of mid-infrared HgCdTe thin films and near-infrared GaInP∕AlGaInP multiple quantum wells, respectively. The results indicate that the He–Ne laser and∕or thermal emission disturbance can be reduced at least 1∕1000 and∕or even 1∕10000, respectively, by the modulated SS-FTIR PL technique, and hence a rather smooth PL spectrum can be obtained even under room temperature for HgCdTe thin films. A brief comparison is given of this technique with previously...