High-resolution Measurement of Refractive Index Based on Resonant Tunneling Effect
A high-resolution measurement device of refractive index with high transmissivity and Q factor based on resonant tunneling effect is presented. The device is constructed by one dimensional photonic crystal (PC) with a defect which would produce different resonant peaks in PC band gap. These peaks are sensitive to the change of the refractive index for different mediums which are filled in the defect. It is found that with a spectrometer that can resolve a resonant peak shift of 0.5nm, at the resonant wavelength of about 1550wn, the resolution of refractive index should be better than An = 0.0008, and the transmissivity could be accessible to 1. Both the plane wave method and the finite difference time domain method are employed in numerical analysis. The device is suitable in a variety of applications of practical interest, since many physical, chemical, and biological parameters can be known through measurement of the refractive index.
J Liu C QHuang P Tian Z M Wan Z M Luo M Chen
College of Infoimation & Communication Engineering, Hunan Institute of Science and Technology, Yueya College of Physics & Electronics Information, Hunan Institute of Science and Technology, Yueyang 414 College of Optoelectronic Science and Engineering, Wuhan National Laboratory for Opt
国际会议
3rd International Photonics & OptoElectronics Meetings(第三届国际光子与光电子学会议 POEM 2010)
武汉
英文
1-5
2010-11-03（万方平台首次上网日期，不代表论文的发表时间）