期刊
NANO LETTERS
卷 14, 期 6, 页码 3487-3490出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl5010477
关键词
Semiconductor Nanowire; Second-Harmonic Generation; Optical Correlator; Ultrashort Pulse Measurement; Group-Velocity Measurement
类别
资金
- National Key Basic Research Program of China [2013CB328703, 2012CB921400]
- Fundamental Research Funds for the Central Universities
- Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, of the U. S. Department of Energy [DE-AC03-76SF00098]
Integration of miniaturized elements has been a major driving force behind modern photonics. Nanowires have emerged as potential building blocks for compact photonic circuits and devices in nanophotonics. We demonstrate here a single nanowire optical correlator (SNOC) for ultrafast pulse characterization based on imaging of the second harmonic (SH) generated from a cadmium sulfide (CdS) nanowire by counterpropagating guided pulses. The SH spatial image can be readily converted to the temporal profile of the pulses, and only an overall pulse energy of 8 mu J is needed to acquire a clear image of 200 fs pulses. Such a correlator should be easily incorporated into a photonic circuit for future use of on-chip ultrafast optical technology.
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