Author Affiliations
Abstract
1 School of Electrical Engineering and Computer Science, Louisiana State University, Baton Rouge, Louisiana 70803, USA
2 Center for Computation and Technology, Louisiana State University, Baton Rouge, Louisiana 70803, USA
3 Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
We introduce a nanoplasmonic isolator that consists of a cylindrical resonator placed close to a metal-dielectric-metal (MDM) waveguide. The material filling the waveguide and resonator is a magneto-optical (MO) material, and the structure is under an externally applied static magnetic field. We theoretically investigate the properties of the structure and show that the cavity mode without MO activity splits into two modes when the MO activity is present. In addition, we find that the presence of the MDM waveguide leads to a second resonance due to the geometrical asymmetry caused by the existence of the waveguide. We also show that, when MO activity is present, the cavity becomes a traveling wave resonator. Thus, the transmission of the structure depends on the direction of the incident light, and the proposed structure operates as an optical isolator.
plasmonics metal optics magneto-optic systems Chinese Optics Letters
2021, 19(8): 083602
Author Affiliations
Abstract
1 Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics, School of Physics and Engineering, Qufu Normal University, Qufu 273165, China
2 College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, China
3 College of Precision Instrument & Opto-electronics Engineering, Tianjin University, Tianjin 300072, China
4 Key Laboratory of Opto-electronics Information and Technical Science, Ministry of Education, Tianjin University, Tianjin 300072, China
The polarization of a D-shaped fiber is modulated after immersing it in magnetic fluid (MF) and applying a magnetic field. Theoretical analysis predicts that magneto-optical dichroism of MF plays a key role in light polarization modulation. During light polarization modulation, the evanescent wave polarized parallel to the magnetic field has greater loss than its orthogonal component. Light polarization of a D-shaped fiber with a wide polished surface can be modulated easily. High concentration MF and a large magnetic field all have great ability to modulate light polarization.
fiber optics components polarization-selective devices magneto-optic systems magneto-optical materials Chinese Optics Letters
2020, 18(1): 010601
Author Affiliations
Abstract
Department of Applied Physics, Beihang University, Beijing 100191, China
A method for local magneto-optical Kerr effect imaging based on a home-made scanning near-field optical microscope working in reflection mode is presented. Shear force detection is carried out by using a symmetric piezoelectric bimorph sensor, which provides an easy way not only for probe-surface distance control but also for imaging. Polarization-preserving fiber probes used as a local optical detector are fabricated with a heating-pulling technique and the probes' polarization properties are measured. Shear force topographic and near-field magneto-optical images of magneto-optical disk taken with the proposed method are shown.
磁光克尔效应 扫描近场光学显微镜 光纤探针 磁畴 180.4243 Near-field microscopy 210.3810 Magneto-optic systems 190.3270 Kerr effect Chinese Optics Letters
2010, 8(3): 313
Author Affiliations
Abstract
1 College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330027
2 Department of Physics, the State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication Systems, Shanghai Jiao Tong University, Shanghai 200240
The response time and transmittivity of the magnetic fluid (MF) for different concentrations at room temperature were investigated in this letter. The volume fraction of the investigated sample ranged from 0.44% to 6.47%. It was found that the transmittivity decreased with increasing concentration under a given magnetic field, and the evolution time was changed with different concentrations. Moreover, the light intensity decreased rapidly at the beginning and then became stable when the magnetic field was applied.
磁流体 响应时间 透射 160.3820 Magneto-optical materials 210.3810 Magneto-optic systems 310.6860 Thin films, optical properties Chinese Optics Letters
2008, 6(10): 767
