Polarization effects in nonlinear interference of down-converted photons

Paterova, Anna V.; Yang, Hongzhi; An, Chengwu; Kalashnikov, Dmitry; Krivitsky, Leonid A.

doi:10.1364/oe.27.002589

Cited by 23 publications

(19 citation statements)

References 39 publications

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“…Next, although the work presented here is in a reflection configuration, the method can be implemented in a transmission configuration by using alternative designs of nonlinear interferometers (22,40,41). The method can also be used for polarization-sensitive measurements (42). With this demonstration, a new hyperspectral IR microscopy will be unlocked for practical applications in bioimaging and material analysis.…”

Section: Discussionmentioning

confidence: 99%

Hyperspectral infrared microscopy with visible light

et al. 2020

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Hyperspectral microscopy is an imaging technique that provides spectroscopic information with high spatial resolution. When applied in the relevant wavelength region, such as in the infrared (IR), it can reveal a rich spectral fingerprint across different regions of a sample. Challenges associated with low efficiency and high cost of IR light sources and detector arrays have limited its broad adoption. Here, we introduce a new approach to IR hyperspectral microscopy, where the IR spectral map is obtained with off-the-shelf components built for visible light. The method is based on the nonlinear interference of correlated photons generated via parametric down-conversion. In this proof-of-concept we demonstrate the chemical mapping of a patterned sample, where different areas have distinctive IR spectroscopic fingerprints. The method provides a wide field of view, fast readout, and negligible heat delivered to the sample, which opens prospects for its further development for applications in material and biological studies.

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Section: Discussionmentioning

confidence: 99%

Hyperspectral infrared microscopy with visible light

et al. 2020

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“…This method allows assessing the sample properties in the challenging for detection and broadband IR range by using an accessible light source and a photodetector for visible light. Earlier, nonlinear interferometers have been used for several metrological applications, including IR imaging, spectroscopy, optical coherence tomography, and polarimetry [26][27][28][29][30][31][32][33][34][35]. Here we apply it for the characterisation of IR dielectric metasurfaces and revealing fabrication imperfections.…”

Section: Introductionmentioning

confidence: 99%

Non-linear interferometry with infrared metasurfaces

et al. 2021

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The optical elements comprised of sub-diffractive light scatterers, or metasurfaces, hold a promise to reduce the footprint and unfold new functionalities of optical devices. A particular interest is focused on metasurfaces for manipulation of phase and amplitude of light beams. Characterisation of metasurfaces can be performed using interferometry, which, however, may be cumbersome, specifically in the infrared (IR) range. Here, we realise a new method for characterising metasurfaces operating in the telecom IR range using accessible components for visible light. Correlated IR and visible photons are launched into a non-linear interferometer so that the phase profile, imposed by the metasurface on the IR photons, modifies the interference at the visible photon wavelength. Furthermore, we show that this concept can be used for broadband manipulation of the intensity profile of a visible beam using a single IR metasurface. Our method unfolds the potential of quantum interferometry for the characterization of advanced optical elements.

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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 . All these techniques are intrinsically interferometric.…”

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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Polarization effects in nonlinear interference of down-converted photons

Cited by 23 publications

References 39 publications

Hyperspectral infrared microscopy with visible light

Hyperspectral infrared microscopy with visible light

Non-linear interferometry with infrared metasurfaces

Nonlinear interference in crystal superlattices

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