Super-Resonant Intracavity Coherent Absorption

Malara, P.; Campanella, Carlo Edoardo; Giorgini, A.; Avino, S.; Natale, P. De; Gagliardi, G.

doi:10.1038/srep28947

Cited by 10 publications

(10 citation statements)

References 24 publications

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“…These resonant sensor systems are mainly built using FBGs with complex scattering sources (SCs) which couple two counter-propagating modes (traveling wave (TW)) in a ring resonator. This mode coupling generates a spectral response characterized by two asymmetric resonance lines (called ”mode splitting” in the scientific literature and used for many applications, besides the strain sensing [ 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ].…”

Section: Operation Principle Of Splitting Mode Strain Sensors Basementioning

confidence: 99%

Fibre Bragg Grating Based Strain Sensors: Review of Technology and Applications

Campanella

Cuccovillo²,

Yurt³

et al. 2018

Sensors

374

185

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Fibre Bragg grating (FBG) strain sensors are not only a very well-established research field, but they are also acquiring a bigger market share due to their sensitivity and low costs. In this paper we review FBG strain sensors with high focus on the underlying physical principles, the interrogation, and the read-out techniques. Particular emphasis is given to recent advances in highly-performing, single head FBG, a category FBG strain sensors belong to. Different sensing schemes are described, including FBG strain sensors based on mode splitting. Their operation principle and performance are reported and compared with the conventional architectures. In conclusion, some advanced applications and key sectors the global fibre-optic strain sensors market are envisaged, as well as the main market players acting in this field.

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Section: Operation Principle Of Splitting Mode Strain Sensors Basementioning

confidence: 99%

Fibre Bragg Grating Based Strain Sensors: Review of Technology and Applications

Campanella

Cuccovillo²,

Yurt³

et al. 2018

Sensors

374

185

View full text Add to dashboard Cite

show abstract

“…To experimentally record the spectral responses of the FP ring resonator, an integrated cavity output technique can be used [6], and the C R can be adjusted through a fine tuning of the FP loss (by adjusting a tunable absorber inserted along the optical path l FP ) while the C R slope can be controlled through the features of the couplers (by adjusting the coupling coefficients of two tunable couplers).…”

Section: Resultsmentioning

confidence: 99%

“…Recently, because of the strong analogy between quantum mechanics and optics, the principles of parity time (PT) symmetry systems and PT symmetry breaking systems have been successfully transferred from the physical context of Hamiltonians describing the features of quantum systems to the scattering matrix describing the spectral properties of optical systems [1]. In this scenario, several investigations about intriguing phenomena consisting of loss-induced transparency [2], nonreciprocal light transmission [3,4], perfect coherent absorption [5,6], enhancement in sensing [7], and non-linearity [8] have been reported in literature. However, the possibility of controlling the propagation direction of light in passive and linear coupled optical cavities has not yet been investigated.…”

Section: Introductionmentioning

confidence: 99%

Loss-induced control of light propagation direction in passive linear coupled optical cavities

Campanella¹,

Carlo²,

Cuccovillo³

et al. 2018

Photon. Res.

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Redirecting the flow of light on the basis of the absorption/gain properties of optical systems is of great interest in many research fields, ranging from optical routing to optical cloaking. In this paper we investigate the control of the direction of the light propagation through loss-induced absorption in passive linear coupled optical systems. The considered optical system consists of a mode-splitting resonant cavity formed by coupling a Fabry-Perot (FP) cavity with a ring resonator. The coalescence of the asymmetric resonances, generated through mode-splitting dynamics, is the spectral result of the parity time symmetry breaking at FP resonance wavelengths. For specific values of the FP overall loss, a predominant backward propagation in the FP ring resonator occurs. In fiber optics technology, this device shows an ability to invert the sense of propagation of the light, quantified through the contrast ratio, in the order of 20 dB. This value can be obtained by externally varying the FP loss coefficient for a fixed set of the other physical parameters of the FP ring resonator. Our results can open a new way toward novel high-performance optical modulation and routing schemes.

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“…This may complicate the circuit design if the unwanted signal occurs deep within the circuit. Integrated CPA devices could resolve this difficulty by serving as efficient 'sinks' for optical signals [113,115,117,121]. In the quantum optics limit, the ability to control and remotely trigger perfect absorption of single-or few-photon states could likewise be useful for quantum information processing [137].…”

Section: Discussion and Outlookmentioning

confidence: 99%

“…Advances towards the use of CPAs in integrated nanophotonic structures have recently been reported [115,121]. A CPA was realized using a photonic silicon racetrack resonator coupled to four input/output ports [115] (Fig.…”

Section: Guided Mode Structuresmentioning

confidence: 99%

Coherent perfect absorbers: linear control of light with light

et al. 2017

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Absorption of electromagnetic energy by a material is a phenomenon that underlies many applied problems, including molecular sensing, photocurrent generation and photodetection. Commonly, the incident energy is delivered to the system through a single channel, for example by a plane wave incident on one side of an absorber. However, absorption can be made much more efficient by exploiting wave interference. A coherent perfect absorber is a system in which complete absorption of electromagnetic radiation is achieved by controlling the interference of multiple incident waves. Here, we review recent advances in the design and applications of such devices. We present the theoretical principles underlying the phenomenon of coherent perfect absorption and give an overview of the photonic structures in which it can be realized, including planar and guidedmode structures, graphene-based systems, parity-and time-symmetric structures, 3D structures and quantum-mechanical systems. We then discuss possible applications of coherent perfect absorption in nanophotonics and, finally, we survey the perspectives for the future of this field.

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Super-Resonant Intracavity Coherent Absorption

Cited by 10 publications

References 24 publications

Fibre Bragg Grating Based Strain Sensors: Review of Technology and Applications

Fibre Bragg Grating Based Strain Sensors: Review of Technology and Applications

Loss-induced control of light propagation direction in passive linear coupled optical cavities

Coherent perfect absorbers: linear control of light with light

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