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Towards an optical coupler using fine-wire: a study of the photovoltaic effect of a heterojunction formed in a single fine-wire of tungsten oxides 下载免费PDF全文
Nanodevices using the photovoltaic effect of a single nanowire
have attracted growing interest. In this paper, we consider
potential applications of the photovoltaic effect to optical signal
coupling and optical power transmission, and report on the
realization of a heterojunction formed between WO2 and WO3 in a fine-wire having a diameter on the micrometer scale. Using a
laser beam of 514.5~nm as a signal source, the WO2--WO3
heterojunction yields a maximum output power of up to 37.4 pico watt
per heterojunction. Fast responses (less than a second) of both
photovoltaic voltage and current are also observed. In addition, we
demonstrate that it is a simple and effective way to adapt a
commercial Raman spectrometer for the combined functions of
fabrication, material characterization and photovoltaic measurement
of an optical signal coupler and optical power transmitter based on a
fine-wire. Our results show an attractive perspective of developing
nanowire or fine-wire elements for coupling optical signals into and
for powering a nanoelectronic or nano-optoelectronic integrated
circuit that works under the condition of preventing it from
directly electrically connecting with the optical coupler. 相似文献
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Preparation of few-layer graphene-capped boron nanowires and their field emission properties 下载免费PDF全文
Large-area boron nanowire(BNW) films were fabricated on the Si(111) substrate by chemical vapor deposition(CVD). The average diameter of the BNWs is about 20 nm, with lengths of 5–10 μm. Then, graphene-capped boron nanowires(GC-BNWs) were obtained by microwave plasma chemical vapor deposition(MPCVD). Characterization by scanning electron microscopy indicates that few-layer graphene covers the surface of the boron nanowires. Field emission measurements of the BNWs and GC-BNW films show that the GC-BNW films have a lower turn-on electric field than the BNW films. 相似文献
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