Integrated Source of Path-Entangled Photon Pairs with Efficient Pump Self-Rejection

Hoz, P. de la; Sakovich, Anton; Mikhalychev, A.; Thornton, Matthew; Korolkova, Natalia; Mogilevtsev, D.

doi:10.3390/nano10101952

Cited by 4 publications

(4 citation statements)

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“…To demonstrate the way of experimental realization of reciprocity breaking purely by designed nonlinear loss, here we consider a recently suggested scheme with self-Kerr nonlinear waveguides that implements the dissipative coupling scheme depicted in Fig. 1(a) [24,25,45]. This scheme allows to produce two-photon loss or NCL of the kind given by Eq.…”

Section: Toward Practical Non-reciprocity With Nonlinear Dissipationmentioning

confidence: 99%

“…Figure 3(b) shows that reciprocity is broken for such a system also for a finite time even in the regime when the system's state is far from the stationary state. For the simulation, we have taken that the system is also subject to common single-photon loss, and that two-photon loss is present also in the second part of the device (which corresponds to the realistic threewaveguide scheme [25,45]). So, for the first part, we have taken γ 0 = γ 1 = γ , γ 2 = 0; for the second part, we have taken γ j = γ , ∀ j .…”

Section: Toward Practical Non-reciprocity With Nonlinear Dissipationmentioning

confidence: 99%

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Breaking reciprocity by designed loss

2022

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In this paper, we show how designed loss in open quantum systems can break the reciprocity of field propagation, and how non-reciprocal and even unidirectional propagation can be achieved for different kinds of designed loss, both linear and nonlinear. In particular, we show how unidirectional propagation can be achieved for input states of certain symmetry in linear schemes, and demonstrate the possibility of building a single-mode optical insulator by combining two kinds of nonlinear designed losses, and the way to build a non-reciprocal asymmetric field distributor with a planar structure of dissipatively coupled waveguides. We discuss the feasibility of the considered schemes and suggest possible realizations.

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Section: Toward Practical Non-reciprocity With Nonlinear Dissipationmentioning

confidence: 99%

Section: Toward Practical Non-reciprocity With Nonlinear Dissipationmentioning

confidence: 99%

Breaking reciprocity by designed loss

2022

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Toward Practical Non-reciprocity With Nonlinear Dissipationmentioning

confidence: 99%

“…3(b) shows that reciprocity is broken for such a system also for a finite time even in the regime when the systems' state is far from the stationary state. For the simulation we have taken that the system is also subject to the common single-photon loss, and that the two-photon loss is present also in the second part of the device (which corresponds to the realistic three-waveguide scheme [25,45]). So, for the first part we have taken γ 0 = γ 1 = γ, γ 2 = 0; for the second part we have taken γ j = γ, ∀j.…”

Section: Toward Practical Non-reciprocity With Nonlinear Dissipationmentioning

confidence: 99%

Breaking reciprocity by designed loss

Peshko,

Pustakhod,

Mogilevtsev

2022

Preprint

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In this paper we show how designed loss in open quantum systems can break reciprocity of the state propagation, and how the non-reciprocal and even unidirectional propagation can be achieved for different kinds of designed loss, both linear and nonlinear ones. In particular, we show how a unidirectional propagation can be achieved for states of certain symmetry in linear schemes, demonstrate possibility of building a single-mode optical insulator by combining two kinds of nonlinear designed losses, and the way to build non-reciprocal circulator with a planar structure of dissipatively coupled waveguides. We discuss feasibility of the considered schemes and suggest possible realizations. I. INTRODUCTIONRecently, non-reciprocal propagation of electromagnetic field became a popular research theme. Non-reciprocity is important for quite a wide of practical tasks, from field distributors and circulators to lasing and high-precision sensing [1][2][3][4][5][6]. Current interest to realization of non-reciprocal systems, and especially isolators, is born of necessity to extent methods commonly applied for longer wavelength (radio, microwaves, etc.) toward optical region and possibility to integrate non-reciprocal systems into photonic circuitry. Traditional realizations implementing magneto-sensitive media are either hard to realize on the basis of existing integration platforms, or difficult even to realize for optical wavelength, or both [4,5]. So, a plethora of novel schemes for breaking reciprocity has appeared in recent years. There are schemes exploiting time-modulation [7,8], nonlinearities [9][10][11] and interaction with few-level systems, such as atom-like structures [4,[12][13][14], optomechanics [15], topological properties of structured media [5,16,17].Some quite interesting results were also obtained by considering loss. Recently it was shown that even common single-photon energy losses in conjunction with the usual (i.e., unitary) coupling can also be a tool for devising non-reciprocal multi-mode structures [18,19]. Even more interesting results are obtained with designed loss, i.e., for example, when different systems are coupled to the same loss reservoir inducing dissipative coupling between them, or when loss is made to be nonlinear. For instance, designed collective linear loss can lead to unidirectional propagation and amplification [20,21].Here we present another interesting feature of designed loss: it is ability to break reciprocity without conjoining with the simultaneous unitary coupling. We discuss a general recipe for doing so with the designed loss allowing for several stationary states, provide several examples and outline ways for possible practical realizations, in particular, with integrable planar waveguide systems. Notice that schemes relying only on the designed loss might be easier to realize in practice that schemes combining unitary and dissipative coupling, since one does not need adjusting different types of coupling. We show how the designed nonlinear loss can break reciprocity ev...

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