A polarization beam splitter based on a self-collimation Michelson interferometer (SMI) in a hole-type silicon photonic crystal is proposed and numerically demonstrated.Utilizing the polarization dependence of the tra...A polarization beam splitter based on a self-collimation Michelson interferometer (SMI) in a hole-type silicon photonic crystal is proposed and numerically demonstrated.Utilizing the polarization dependence of the transmission spectra of the SMI and polarization peak matching method,the SMI can work as a polarization beam splitter (PBS) by selecting an appropriate path length difference in the structure.Based on its novel polarization beam splitting mechanics,the polarization extinction ratios (PERs) for TM and TE modes are as high as 18.4 dB and 24.3 dB,respectively.Since its dimensions are only several operating wavelengths,the PBS may have practical applications in photonic integrated circuits.展开更多
We report 1×4 optical splitters(OSs)with different splitting ratios based on either rod-type or hole-type silicon photonic crystal self-collimation ring resonators(SCRRs).The four beam splitters of the OSs are fo...We report 1×4 optical splitters(OSs)with different splitting ratios based on either rod-type or hole-type silicon photonic crystal self-collimation ring resonators(SCRRs).The four beam splitters of the OSs are formed by changing the radii of silicon rods or air holes.The light beam propagating along the SCRR can be controlled by the self-collimation effect.The transmission spectra at the through and drop ports are investigated by using the finite-difference time-domain(FDTD)method.The simulated results agree well with the theoretical calculation.For 1550-nm dropping wavelength,the free spectral ranges for rod-type and hole-type configurations are 28.8 nm and 32.5 nm,respectively,which almost cover the whole optical communication C-band window.The dimensions of these structures are only about 10μm×10μm.展开更多
基金Supported by the Program for New Century Excellent Talents in University under Grant No NCET040615the Natural Science Foundation of Fujian Province under Grant No 2011J01017.
文摘A polarization beam splitter based on a self-collimation Michelson interferometer (SMI) in a hole-type silicon photonic crystal is proposed and numerically demonstrated.Utilizing the polarization dependence of the transmission spectra of the SMI and polarization peak matching method,the SMI can work as a polarization beam splitter (PBS) by selecting an appropriate path length difference in the structure.Based on its novel polarization beam splitting mechanics,the polarization extinction ratios (PERs) for TM and TE modes are as high as 18.4 dB and 24.3 dB,respectively.Since its dimensions are only several operating wavelengths,the PBS may have practical applications in photonic integrated circuits.
基金Supported in part by the Program for New Century Excellent Talents in University under Grant No NCET040615the Natural Science Foundation of Fujian Province under Grant No 2011J01017.
文摘We report 1×4 optical splitters(OSs)with different splitting ratios based on either rod-type or hole-type silicon photonic crystal self-collimation ring resonators(SCRRs).The four beam splitters of the OSs are formed by changing the radii of silicon rods or air holes.The light beam propagating along the SCRR can be controlled by the self-collimation effect.The transmission spectra at the through and drop ports are investigated by using the finite-difference time-domain(FDTD)method.The simulated results agree well with the theoretical calculation.For 1550-nm dropping wavelength,the free spectral ranges for rod-type and hole-type configurations are 28.8 nm and 32.5 nm,respectively,which almost cover the whole optical communication C-band window.The dimensions of these structures are only about 10μm×10μm.
