TY  - CONF
AU  - Nedić, Milica
AU  - Gligorić, Goran
AU  - Petrović, Jovana
AU  - Maluckov, Aleksandra
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/13043
AB  - Photonic lattices of optical waveguides present a well-controlled platform for investigation of different phenomena associated with the topological characteristics of physical systems. Recently, the first experimental realization of a Majorana zero-mode bound at vortexlike distortion induced in the bulk of a 2D graphene-like photonic lattice is demonstrated in [1]. The observed modes lie mid-gap at zero energy and they are extremely robust to the perturbations to the underlying Hamiltonian. We use bipartite armchair hexagonal lattice and create a vortex topological defect by perturbing positions of the central waveguides and numerically examine how the eigenvalues spectrum depends on the distortion phase. The observed robustness of zero-mode is an indication that adding the saturable gain and linear loss to lattice can lead to efficient lasing. Starting from the noisy background, we achieve zero-mode lasing, shown in Figure 1. We further investigate its robustness to the changes in driving conditions and the vortex phase with the goal to find an efficeint and steady lasing regime. These results can be used to design a new topological laser.
PB  - Belgrade : Institute of Physics
C3  - 16th Photonics Workshop : Book of abstracts
T1  - Impact of the vortex distortion phase on the efficiency of lasing zero-mode
SP  - 23
EP  - 23
UR  - https://hdl.handle.net/21.15107/rcub_vinar_13043
ER  - 

@conference{
author = "Nedić, Milica and Gligorić, Goran and Petrović, Jovana and Maluckov, Aleksandra",
year = "2023",
abstract = "Photonic lattices of optical waveguides present a well-controlled platform for investigation of different phenomena associated with the topological characteristics of physical systems. Recently, the first experimental realization of a Majorana zero-mode bound at vortexlike distortion induced in the bulk of a 2D graphene-like photonic lattice is demonstrated in [1]. The observed modes lie mid-gap at zero energy and they are extremely robust to the perturbations to the underlying Hamiltonian. We use bipartite armchair hexagonal lattice and create a vortex topological defect by perturbing positions of the central waveguides and numerically examine how the eigenvalues spectrum depends on the distortion phase. The observed robustness of zero-mode is an indication that adding the saturable gain and linear loss to lattice can lead to efficient lasing. Starting from the noisy background, we achieve zero-mode lasing, shown in Figure 1. We further investigate its robustness to the changes in driving conditions and the vortex phase with the goal to find an efficeint and steady lasing regime. These results can be used to design a new topological laser.",
publisher = "Belgrade : Institute of Physics",
journal = "16th Photonics Workshop : Book of abstracts",
title = "Impact of the vortex distortion phase on the efficiency of lasing zero-mode",
pages = "23-23",
url = "https://hdl.handle.net/21.15107/rcub_vinar_13043"
}

Nedić, M., Gligorić, G., Petrović, J.,& Maluckov, A.. (2023). Impact of the vortex distortion phase on the efficiency of lasing zero-mode. in 16th Photonics Workshop : Book of abstracts
Belgrade : Institute of Physics., 23-23.
https://hdl.handle.net/21.15107/rcub_vinar_13043

Nedić M, Gligorić G, Petrović J, Maluckov A. Impact of the vortex distortion phase on the efficiency of lasing zero-mode. in 16th Photonics Workshop : Book of abstracts. 2023;:23-23.
https://hdl.handle.net/21.15107/rcub_vinar_13043 .

Nedić, Milica, Gligorić, Goran, Petrović, Jovana, Maluckov, Aleksandra, "Impact of the vortex distortion phase on the efficiency of lasing zero-mode" in 16th Photonics Workshop : Book of abstracts (2023):23-23,
https://hdl.handle.net/21.15107/rcub_vinar_13043 .

TY  - JOUR
AU  - Nedić, Milica
AU  - Gligorić, Goran
AU  - Petrović, Jovana
AU  - Maluckov, Aleksandra
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10986
AB  - Recently we have witnessed experimental realization of a Majorana zero-mode bound at vortex distortion induced in bipartite hexagonal photonic lattices. Here, we address an open question of the impact of nonlinearity on the zero-mode dynamics by theoretically investigating the abilities of topologically protected zero-modes to guide, couple and lase light in the presence of nonlinear effects. Light-intensity related nonlinearity enters the scene through a local nonlinear lattice response and driving properties: saturable nonlinear gain and linear loss. We demonstrate an efficient steady zero-mode lasing regime by managing the lattice and driving parameters. Obtained results open up possibilities for design of new topological lasers in length-scalable photonic platforms, such as multicore optical fibers. © 2023 Elsevier B.V.
T2  - Physics Letters, Section A: General, Atomic and Solid State Physics
T1  - Nonlinearity and lasing topological zero-mode in distorted photonic lattice
VL  - 477
DO  - 10.1016/j.physleta.2023.128893
ER  - 

@article{
author = "Nedić, Milica and Gligorić, Goran and Petrović, Jovana and Maluckov, Aleksandra",
year = "2023",
abstract = "Recently we have witnessed experimental realization of a Majorana zero-mode bound at vortex distortion induced in bipartite hexagonal photonic lattices. Here, we address an open question of the impact of nonlinearity on the zero-mode dynamics by theoretically investigating the abilities of topologically protected zero-modes to guide, couple and lase light in the presence of nonlinear effects. Light-intensity related nonlinearity enters the scene through a local nonlinear lattice response and driving properties: saturable nonlinear gain and linear loss. We demonstrate an efficient steady zero-mode lasing regime by managing the lattice and driving parameters. Obtained results open up possibilities for design of new topological lasers in length-scalable photonic platforms, such as multicore optical fibers. © 2023 Elsevier B.V.",
journal = "Physics Letters, Section A: General, Atomic and Solid State Physics",
title = "Nonlinearity and lasing topological zero-mode in distorted photonic lattice",
volume = "477",
doi = "10.1016/j.physleta.2023.128893"
}

Nedić, M., Gligorić, G., Petrović, J.,& Maluckov, A.. (2023). Nonlinearity and lasing topological zero-mode in distorted photonic lattice. in Physics Letters, Section A: General, Atomic and Solid State Physics, 477.
https://doi.org/10.1016/j.physleta.2023.128893

Nedić M, Gligorić G, Petrović J, Maluckov A. Nonlinearity and lasing topological zero-mode in distorted photonic lattice. in Physics Letters, Section A: General, Atomic and Solid State Physics. 2023;477.
doi:10.1016/j.physleta.2023.128893 .

Nedić, Milica, Gligorić, Goran, Petrović, Jovana, Maluckov, Aleksandra, "Nonlinearity and lasing topological zero-mode in distorted photonic lattice" in Physics Letters, Section A: General, Atomic and Solid State Physics, 477 (2023),
https://doi.org/10.1016/j.physleta.2023.128893 . .

TY  - CONF
AU  - Gligorić, Goran
AU  - Petrović, Jovana
AU  - Maluckov, Aleksandra
AU  - Nedić, Milica
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12001
AB  - Recently, the first experimental realization of a zero-mode associated with a topological defect in the bulk of a 2D graphene-like photonic lattice by introducing a vortex-like distortion is presented in [1]. The result of the distortion is the creation of a very robust mode localized in the vicinity of the vortex core. Here, we focus on finite bipartite armchair hexagonal-shaped lattice with a Kekule vortex-like distortion and numerically investigate the impact of distortion phase on the lattice eigenvalue spectrum. The substantial robustness of zero-mode indicated a possibility for efficient lasing by inducing the proper lattice pumping. Proposing different distortion phases, we are probing the lasing zero-mode from noisy background by tuning the saturable gain and linear loss driving parameters. The idea is to find the optimal parameter regimes to drive efficient and steady lasing zero-mode, which can be experimentally utilized for realizing novel type of photonic lasers
C3  - WCLOP2023 : 5th World Congress on Lasers, Optics and Photonics : Book of abstracts
T1  - Probing the Efficiency of Lasing Zero-Mode by Changing The Vortex Distortion Phase
SP  - 66
EP  - 66
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12001
ER  - 

@conference{
author = "Gligorić, Goran and Petrović, Jovana and Maluckov, Aleksandra and Nedić, Milica",
year = "2023",
abstract = "Recently, the first experimental realization of a zero-mode associated with a topological defect in the bulk of a 2D graphene-like photonic lattice by introducing a vortex-like distortion is presented in [1]. The result of the distortion is the creation of a very robust mode localized in the vicinity of the vortex core. Here, we focus on finite bipartite armchair hexagonal-shaped lattice with a Kekule vortex-like distortion and numerically investigate the impact of distortion phase on the lattice eigenvalue spectrum. The substantial robustness of zero-mode indicated a possibility for efficient lasing by inducing the proper lattice pumping. Proposing different distortion phases, we are probing the lasing zero-mode from noisy background by tuning the saturable gain and linear loss driving parameters. The idea is to find the optimal parameter regimes to drive efficient and steady lasing zero-mode, which can be experimentally utilized for realizing novel type of photonic lasers",
journal = "WCLOP2023 : 5th World Congress on Lasers, Optics and Photonics : Book of abstracts",
title = "Probing the Efficiency of Lasing Zero-Mode by Changing The Vortex Distortion Phase",
pages = "66-66",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12001"
}

Gligorić, G., Petrović, J., Maluckov, A.,& Nedić, M.. (2023). Probing the Efficiency of Lasing Zero-Mode by Changing The Vortex Distortion Phase. in WCLOP2023 : 5th World Congress on Lasers, Optics and Photonics : Book of abstracts, 66-66.
https://hdl.handle.net/21.15107/rcub_vinar_12001

Gligorić G, Petrović J, Maluckov A, Nedić M. Probing the Efficiency of Lasing Zero-Mode by Changing The Vortex Distortion Phase. in WCLOP2023 : 5th World Congress on Lasers, Optics and Photonics : Book of abstracts. 2023;:66-66.
https://hdl.handle.net/21.15107/rcub_vinar_12001 .

Gligorić, Goran, Petrović, Jovana, Maluckov, Aleksandra, Nedić, Milica, "Probing the Efficiency of Lasing Zero-Mode by Changing The Vortex Distortion Phase" in WCLOP2023 : 5th World Congress on Lasers, Optics and Photonics : Book of abstracts (2023):66-66,
https://hdl.handle.net/21.15107/rcub_vinar_12001 .

TY  - CONF
AU  - Nedić, Milica
AU  - Gligorić, Goran
AU  - Petrović, J.
AU  - Maluckov, Aleksandra
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11801
AB  - Photonics has provided a variety of flexible and controllable systems for probing topological phenomena. Recently, the first experimental realization of a Majorana zero-mode bound at vortex-like distortion has been demonstrated in [1]. The result of the distortion is the creation of a robust mode localized in the vicinity of the vortex core. Here, we focus on finite bipartite armchair hexagonal-shaped lattice with a vortex-like (“Kekule”) distortion [2] and study novel aspects of the zero-mode dynamics in the presence of the nonlinear lattice response and nonlinear driving [3]. We first investigate the impact of saturable Kerr nonlinearity on the properties of zero-modes [4]. The extreme robustness of zero-modes to external perturbation indicate that managing the driving parameters, saturable gain [5] and linear loss, can lead to an efficient and steady lasing regime. We examine how the nonlinearity affects the lasing efficiency, since these effects are unavoidable at higher powers. Based on the results, we propose a new topological laser realisable in a multicore optical fibre.
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
T1  - Impact of nonlinearity on the zero-mode lasing in optical lattices
SP  - 51
EP  - 51
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11801
ER  - 

@conference{
author = "Nedić, Milica and Gligorić, Goran and Petrović, J. and Maluckov, Aleksandra",
year = "2023",
abstract = "Photonics has provided a variety of flexible and controllable systems for probing topological phenomena. Recently, the first experimental realization of a Majorana zero-mode bound at vortex-like distortion has been demonstrated in [1]. The result of the distortion is the creation of a robust mode localized in the vicinity of the vortex core. Here, we focus on finite bipartite armchair hexagonal-shaped lattice with a vortex-like (“Kekule”) distortion [2] and study novel aspects of the zero-mode dynamics in the presence of the nonlinear lattice response and nonlinear driving [3]. We first investigate the impact of saturable Kerr nonlinearity on the properties of zero-modes [4]. The extreme robustness of zero-modes to external perturbation indicate that managing the driving parameters, saturable gain [5] and linear loss, can lead to an efficient and steady lasing regime. We examine how the nonlinearity affects the lasing efficiency, since these effects are unavoidable at higher powers. Based on the results, we propose a new topological laser realisable in a multicore optical fibre.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade",
title = "Impact of nonlinearity on the zero-mode lasing in optical lattices",
pages = "51-51",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11801"
}

Nedić, M., Gligorić, G., Petrović, J.,& Maluckov, A.. (2023). Impact of nonlinearity on the zero-mode lasing in optical lattices. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
Belgrade : Vinča Institute of Nuclear Sciences., 51-51.
https://hdl.handle.net/21.15107/rcub_vinar_11801

Nedić M, Gligorić G, Petrović J, Maluckov A. Impact of nonlinearity on the zero-mode lasing in optical lattices. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade. 2023;:51-51.
https://hdl.handle.net/21.15107/rcub_vinar_11801 .

Nedić, Milica, Gligorić, Goran, Petrović, J., Maluckov, Aleksandra, "Impact of nonlinearity on the zero-mode lasing in optical lattices" in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade (2023):51-51,
https://hdl.handle.net/21.15107/rcub_vinar_11801 .

TY  - CONF
AU  - Mančić, Ana
AU  - Nedić, Milica
AU  - Leykam, D.
AU  - Maluckov, Aleksandra
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11802
AB  - Photonic lattices represent a fruitful testbed for investigating various topological phases, nonlinear phenomena, and intriguing consequences of the development of modulational instability in topologically nontrivial media, as the inter-relation between topological edge states [1], edge solitons [2] and bulk solitons [3]. They provide the possibility not only to highlight the equivalent phenomena in condensed matter systems but to go beyond them into new land of exotic nonlinearly driven topologically moderated states. Recently, we have shown that the modulational instability of nonlinear Bloch modes could be used to probe the band topology in non-driven lattices [4]. As an extension, here, we report on the results of the study of the relaxation of the optical wave fields in nonlinear two-dimensional Chern insulators [5]. They undergo a transition from an ordered bulk state to a disordered state, triggered by the modulational instability [6]. The phenomenon of the memory loss of the initial state is related to nonlinear wave-mixing and ergodization within the gapped bands [7]. The testbed for our numerical study is two-dimensional π-flux square lattice in which we investigate the population of topological bands by the wave mixing of nonlinear Bloch waves. We tune the strength of the nonlinearity and lattice parameters in order to observe different dynamical regimes: toplogical transitions, stable and unstable propagation. We have found that the unstable propagation gives rise to a new quasi-steady state characterized by a convergence of certain wave field characteristics (participation ratio, Chern number, purity gap) to constant values. Next, in order to find the correspondence between this steady state and thermalized wave field we apply a grand canonical approach to calculate the effective temperature and chemical potential of the wave field. We have found that the effective temperature and chemical potential exhibit a strong k – dependence throughout the Brillouin zone. This implies the existence of a long-lived pre-thermalized regime and the absence of thermalization.
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
T1  - The modulation instability triggered band relaxation in photonic Chern insulator
SP  - 52
EP  - 52
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11802
ER  - 

@conference{
author = "Mančić, Ana and Nedić, Milica and Leykam, D. and Maluckov, Aleksandra",
year = "2023",
abstract = "Photonic lattices represent a fruitful testbed for investigating various topological phases, nonlinear phenomena, and intriguing consequences of the development of modulational instability in topologically nontrivial media, as the inter-relation between topological edge states [1], edge solitons [2] and bulk solitons [3]. They provide the possibility not only to highlight the equivalent phenomena in condensed matter systems but to go beyond them into new land of exotic nonlinearly driven topologically moderated states. Recently, we have shown that the modulational instability of nonlinear Bloch modes could be used to probe the band topology in non-driven lattices [4]. As an extension, here, we report on the results of the study of the relaxation of the optical wave fields in nonlinear two-dimensional Chern insulators [5]. They undergo a transition from an ordered bulk state to a disordered state, triggered by the modulational instability [6]. The phenomenon of the memory loss of the initial state is related to nonlinear wave-mixing and ergodization within the gapped bands [7]. The testbed for our numerical study is two-dimensional π-flux square lattice in which we investigate the population of topological bands by the wave mixing of nonlinear Bloch waves. We tune the strength of the nonlinearity and lattice parameters in order to observe different dynamical regimes: toplogical transitions, stable and unstable propagation. We have found that the unstable propagation gives rise to a new quasi-steady state characterized by a convergence of certain wave field characteristics (participation ratio, Chern number, purity gap) to constant values. Next, in order to find the correspondence between this steady state and thermalized wave field we apply a grand canonical approach to calculate the effective temperature and chemical potential of the wave field. We have found that the effective temperature and chemical potential exhibit a strong k – dependence throughout the Brillouin zone. This implies the existence of a long-lived pre-thermalized regime and the absence of thermalization.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade",
title = "The modulation instability triggered band relaxation in photonic Chern insulator",
pages = "52-52",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11802"
}

Mančić, A., Nedić, M., Leykam, D.,& Maluckov, A.. (2023). The modulation instability triggered band relaxation in photonic Chern insulator. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
Belgrade : Vinča Institute of Nuclear Sciences., 52-52.
https://hdl.handle.net/21.15107/rcub_vinar_11802

Mančić A, Nedić M, Leykam D, Maluckov A. The modulation instability triggered band relaxation in photonic Chern insulator. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade. 2023;:52-52.
https://hdl.handle.net/21.15107/rcub_vinar_11802 .

Mančić, Ana, Nedić, Milica, Leykam, D., Maluckov, Aleksandra, "The modulation instability triggered band relaxation in photonic Chern insulator" in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade (2023):52-52,
https://hdl.handle.net/21.15107/rcub_vinar_11802 .