Polarization-dependent Bloch oscillations in optical waveguides

Optical systems provide a new and practical platform for studying Bloch oscillations. This study investigates the fundamental-mode propagation of polarization-dependent Bloch oscillations. By using the three-dimensional properties of femtosecond laser direct writing, we fabricate a polymer-based gra...

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Bibliographic Details
Published in:Optics letters 2022-02, Vol.47 (3), p.617-620
Main Authors: Zhao, Yao, Chen, Yang, Hou, Zhi-Shan, Han, Bing, Fan, Hua, Lin, Lin-Han, Ren, Xi-Feng, Sun, Hong-Bo
Format: Article
Language:English
Subjects:
Birefringence
Direct laser writing
Optical polarization
Optical waveguides
Oscillations
Propagation modes
Refractivity
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Summary:Optical systems provide a new and practical platform for studying Bloch oscillations. This study investigates the fundamental-mode propagation of polarization-dependent Bloch oscillations. By using the three-dimensional properties of femtosecond laser direct writing, we fabricate a polymer-based gradient waveguide array and determine the Bloch oscillations under different polarization inputs by using the birefringence gradient and the equivalent refractive index, thus exhibiting a polarization-dependent Bloch period. Our results provide a new, to the best of our knowledge, paradigm for two-dimensional optical Bloch modes and highlight the influence of optical polarization in the same system, which provides a possibility to observe richer physics related to Bloch oscillations in one structure.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.448090