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Absorption spectra of high purity metallic and semiconducting single-walled carbon nanotubes have been measured from THz to UV region. The broad absorption band around 100-1000 cm-1 of the metallic sample can correspond to the optical transition between small energy gap in “metallic” nanotubes.
We have developed an ultra-micro displacement sensor (Size:1.3 mmtimes1.3 mmtimes1.3 mm) consisting of two-dimensionally distributed monolithically integrated photodiodes (PD) and a vertical cavity surface emitting laser (VCSEL). The sensor size is not only very small, about one hundredth the size of conventional types of this sensor, but it also has a wider measurement range and discrimination of...
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