LiNbO3 waveguides for integrated SPDC spectroscopy

Solntsev, Alexander S.; Kumar, Pawan; Pertsch, Thomas; Sukhorukov, Andrey A.; Setzpfandt, Frank

doi:10.1063/1.5009766

Cited by 43 publications

(22 citation statements)

References 29 publications

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“…More recently, there have been growing interest and efforts in incorporating LN into integrated photonics. [9][10][11][12] To this end, efficient and scalable circuits with low loss are essential for exploiting the strong nonlinearities with LN for broad applications in both classical and quantum domains, including communications, 10 sensing, 11 all-optical signal processing, 13 spectroscopy, 14 and quantum information science. 12 However, LN nanostructures are difficult to fabricate with low loss, due to its inert chemical properties and physical hardness.…”

Section: Introductionmentioning

confidence: 99%

Modal phase matched lithium niobate nanocircuits for integrated nonlinear photonics

et al. 2018

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High complexity, dense integrated nanophotonic circuits possessing strong nonlinearities are desirable for a breadth of applications in classical and quantum optics. In this work, we study natural phase matching via modal engineering in lithium niobate (LN) waveguides and microring resonators on chip for second harmonic generation (SHG). By carefully engineering the geometry dispersion, we observe a 26% W −1 cm −2 normalized efficiency for SHG in a waveguide with submicron transverse mode confinement. With similar cross-sectional dimensions, we demonstrate phase matched SHG in a microring resonator with 10 times enhancement on the out-coupled secondharmonic power. Our platform is capable of harnessing the strongest optical nonlinear and electro-optic effects in LN on chip with unrestricted planar circuit layouts. It offers opportunities for dense and scalable integration of efficient photonic devices with low loss and high nonlinearity.

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Section: Introductionmentioning

confidence: 99%

Modal phase matched lithium niobate nanocircuits for integrated nonlinear photonics

et al. 2018

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“…Fully integrated spectroscopy based on SPDC can in principle also be realized, as has recently been conceptually suggested in a lithium niobate waveguide . Integration in waveguides, where the interaction with the medium under test can be achieved via evanescent fields or coupling to adjacent liquid channels, would provide ultimate stability and miniaturization.…”

Section: Interference‐based Quantum Imagingmentioning

confidence: 99%

Perspectives for Applications of Quantum Imaging

Basset

Setzpfandt

Steinlechner

et al. 2019

Laser & Photonics Reviews

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127

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Quantum imaging is a multifaceted field of research that promises highly efficient imaging in extreme spectral ranges as well as ultralow‐light microscopy. Since the first proof‐of‐concept experiments over 30 years ago, the field has evolved from highly fascinating academic research to the verge of demonstrating practical technological enhancements in imaging and microscopy. Here, the aim is to give researchers from outside the quantum optical community, in particular those applying imaging technology, an overview of several promising quantum imaging approaches and evaluate both the quantum benefit and the prospects for practical usage in the near future. Several use case scenarios are discussed and a careful analysis of related technology requirements and necessary developments toward practical and commercial application is provided.

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“…Nonlinear interferometers have been realized using numerous physical platforms, including bulk nonlinear crystals [11][12][13][14][16][17][18] , gas cells 19 , fiberized networks 20,21 , and nonlinear waveguides 22,23 . Additionally, nonlinear interferometers have been used for imaging 24 , spectroscopy 16,[25][26][27] , optical coherence tomography 28,29 , superresolution interferometry 18,19 , and polarimetry 30 .…”

Section: Introductionmentioning

confidence: 99%

Nonlinear interference in crystal superlattices

Paterova¹,

Krivitsky²

2020

Light Sci Appl

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Nonlinear interferometers with correlated photons hold promise to advance optical characterization and metrology techniques by improving their performance and affordability. These interferometers offer subshot noise phase sensitivity and enable measurements in detection-challenging regions using inexpensive and efficient components. The sensitivity of nonlinear interferometers, defined by the ability to measure small shifts of interference fringes, can be significantly enhanced by using multiple nonlinear elements, or crystal superlattices. However, to date, experiments with more than two nonlinear elements have not been realized, thus hindering the potential of nonlinear interferometers. Here, we build a nonlinear interferometer with up to five nonlinear elements, referred to as superlattices, in a highly stable and versatile configuration. We study the modification of the interference pattern for different configurations of the superlattices and perform a proof-of-concept gas sensing experiment with enhanced sensitivity. Our approach offers a viable path towards broader adoption of nonlinear interferometers with correlated photons for imaging, interferometry, and spectroscopy.

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LiNbO3 waveguides for integrated SPDC spectroscopy

Cited by 43 publications

References 29 publications

Modal phase matched lithium niobate nanocircuits for integrated nonlinear photonics

Modal phase matched lithium niobate nanocircuits for integrated nonlinear photonics

Perspectives for Applications of Quantum Imaging

Nonlinear interference in crystal superlattices

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