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Article

Micro-Ring Resonator-Based Tunable Vortex Beam Emitter

by
Liaisan I. Bakirova
1,
Grigory S. Voronkov
1,
Vladimir S. Lyubopytov
1,
Muhammad A. Butt
2,*,
Svetlana N. Khonina
2,3,
Ivan V. Stepanov
1,
Elizaveta P. Grakhova
1 and
Ruslan V. Kutluyarov
1
1
School of Photonics Engineering and Research Advances (SPhERA), Ufa University of Science and Technology, 32, Z. Validi St., 450076 Ufa, Russia
2
Samara National Research University, 443086 Samara, Russia
3
IPSI-RAS-Branch of the FSRC “Crystallography and Photonics” RAS, 443001 Samara, Russia
*
Author to whom correspondence should be addressed.
Micromachines 2024, 15(1), 34; https://doi.org/10.3390/mi15010034
Submission received: 22 November 2023 / Revised: 20 December 2023 / Accepted: 21 December 2023 / Published: 23 December 2023
(This article belongs to the Special Issue Photonic and Optoelectronic Devices and Systems, Second Edition)
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Abstract

Light beams bearing orbital angular momentum (OAM) are used in various scientific and engineering applications, such as microscopy, laser material processing, and optical tweezers. Precise topological charge control is crucial for efficiently using vortex beams in different fields, such as information encoding in optical communications and sensor systems. This work presents a novel method for optimizing an emitting micro-ring resonator (MRR) for emitting vortex beams with variable orders of OAM. The MRR consists of a ring waveguide with periodic structures side-coupled to a bus waveguide. The resonator is tunable due to the phase change material Sb2Se3 deposited on the ring. This material can change from amorphous to crystalline while changing its refractive index. In the amorphous phase, it is 3.285 + 0i, while in the transition to the crystalline phase, it reaches 4.050 + 0i at emission wavelength 1550 nm. We used this property to control the vortex beam topological charge. In our study, we optimized the distance between the bus waveguide and the ring waveguide, the bending angle, and the width of the bus waveguide. The optimality criterion was chosen to maximize the flux density of the radiated energy emitted by the resonator. The numerical simulation results proved our method. The proposed approach can be used to optimize optical beam emitters carrying OAM for various applications.
Keywords: vortex beam; orbital angular momentum; micro-ring resonator; phase change material; critical coupling condition; photonic integrated circuit vortex beam; orbital angular momentum; micro-ring resonator; phase change material; critical coupling condition; photonic integrated circuit

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MDPI and ACS Style

Bakirova, L.I.; Voronkov, G.S.; Lyubopytov, V.S.; Butt, M.A.; Khonina, S.N.; Stepanov, I.V.; Grakhova, E.P.; Kutluyarov, R.V. Micro-Ring Resonator-Based Tunable Vortex Beam Emitter. Micromachines 2024, 15, 34. https://doi.org/10.3390/mi15010034

AMA Style

Bakirova LI, Voronkov GS, Lyubopytov VS, Butt MA, Khonina SN, Stepanov IV, Grakhova EP, Kutluyarov RV. Micro-Ring Resonator-Based Tunable Vortex Beam Emitter. Micromachines. 2024; 15(1):34. https://doi.org/10.3390/mi15010034

Chicago/Turabian Style

Bakirova, Liaisan I., Grigory S. Voronkov, Vladimir S. Lyubopytov, Muhammad A. Butt, Svetlana N. Khonina, Ivan V. Stepanov, Elizaveta P. Grakhova, and Ruslan V. Kutluyarov. 2024. "Micro-Ring Resonator-Based Tunable Vortex Beam Emitter" Micromachines 15, no. 1: 34. https://doi.org/10.3390/mi15010034

APA Style

Bakirova, L. I., Voronkov, G. S., Lyubopytov, V. S., Butt, M. A., Khonina, S. N., Stepanov, I. V., Grakhova, E. P., & Kutluyarov, R. V. (2024). Micro-Ring Resonator-Based Tunable Vortex Beam Emitter. Micromachines, 15(1), 34. https://doi.org/10.3390/mi15010034

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