Wavelength-Tunable Vortex Beam Emitter Based on Silicon Micro-Ring with PN Depletion Diode

Sensors

Vladimir S. Lyubopytov¹  Niels Neumann²  Svetlana N. Khonina³  Albert K. Sultanov⁴  Ivan V. Stepanov⁴  Denis M. Fatkhiev⁴  Elizaveta P. Grakhova⁴  Ruslan V. Kutluyarov⁴ 

[1]Center for Photonic Science and Engineering, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia

[2]Chair of Radio Frequency and Photonics Engineering, TU Dresden, 01062 Dresden, Germany

[3]Department of Technical Cybernetics, Samara National Research University, 443086 Samara, Russia

[4]School of Photonics Engineering and Research Advances (SPhERA), Ufa State Aviation Technical University, 450008 Ufa, Russia

关键词: orbital angular momentum;    vortex beam;    microring resonator;    pn-depletion diode;   

DOI  :  10.3390/s22030929

来源: DOAJ

【 摘 要 】

Herein we propose a design of a wavelength-tunable integrated vortex beam emitter based on the silicon-on-insulator platform. The emitter is implemented using a PN-depletion diode inside a microring resonator with the emitting hole grating that was used to produce a vortex beam. The resonance wavelengths can be shifted due to the refractive index change associated with the free plasma dispersion effect. Obtained numerical modeling results confirm the efficiency of the proposed approach, providing a resonance wavelength shift while maintaining the required topological charge of the emitted vortex beam. It is known that optical vortices got a lot of attention due to extensive telecommunication and biochemical applications, but also, they have revealed some beneficial use cases in sensors. Flexibility in spectral tuning demonstrated by the proposed device can significantly improve the accuracy of sensors based on fiber Bragg gratings. Moreover, we demonstrate that the proposed device can provide a displacement of the resonance by the value of the free spectral range of the ring resonator, which means the possibility to implement an ultra-fast orbital angular momentum (de)multiplexing or modulation.

【 授权许可】

Unknown