Prof. Yuecheng Shen Profile

Prof. Yuecheng Shen

Associate Professor at Sun Yat-Sen Univ

SPIE Involvement:

Author

Area of Expertise:

Nanophotonics , Wavefront Engineering , Biomedical Imaging

Publications (16)

Proceedings Article | 4 October 2023 Presentation + Paper

Switching between topological edge states using phase-change materials

Georgios Veronis, Yin Huang, Yuecheng Shen

Proceedings Volume 12647, 1264707 (2023) https://doi.org/10.1117/12.2677837

KEYWORDS: Switching, Crystals, Systems modeling, Waveguides, Optical properties

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Proceedings Article | 3 October 2022 Presentation + Paper

Magneto-optical isolation and topological edge states at singular points in plasmonic structures

Georgios Veronis, Yin Huang, Yuecheng Shen, Vahid Foroughi Nezhad, Chenglong You

Proceedings Volume 12196, 121960C (2022) https://doi.org/10.1117/12.2633235

KEYWORDS: Waveguides, Plasmonics, Magneto-optics, Resonators, Optical isolators, Magnetism, Plasmonic waveguides

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Proceedings Article | 1 August 2021 Presentation + Paper

Switching between singular points and exceptional-point-enhanced sensing in non-Hermitian photonic structures

Georgios Veronis, Yin Huang, Lanyan Wang, Yuecheng Shen

Proceedings Volume 11796, 1179618 (2021) https://doi.org/10.1117/12.2594327

KEYWORDS: Switching, Waveguides, Crystals, Waveguide modes, Refractive index, Dielectrics, Photodetectors, Wave propagation, Switches, Optical components

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Proceedings Article | 4 March 2019 Presentation

Time-reversed ultrasonically encoded (TRUE) optical focusing through highly scattering ex vivo human cataractous lenses for congenital cataract treatment (Conference Presentation)

Yan Liu, Yuecheng Shen, Haowen Ruan, Frank Brodie, Terence T. Wong, Changhuei Yang, Lihong Wang

Proceedings Volume 10886, 1088602 (2019) https://doi.org/10.1117/12.2508994

KEYWORDS: Scattering, Lenses, Surgery, Retina, Light scattering, Wavefronts, Visual system, Opacity, Visualization

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Proceedings Article | 19 September 2018 Presentation + Paper

Using phase-change materials to switch the direction of reflectionless light propagation in non-PT-symmetric structures

Georgios Veronis, Yin Huang, Yuecheng Shen, Changjun Min

Proceedings Volume 10721, 107210I (2018) https://doi.org/10.1117/12.2322004

KEYWORDS: Scattering, Switching, Switches, Optical components, Light scattering, Light wave propagation, Structural design

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We introduce a non-parity-time-symmetric three-layer structure, consisting of a gain medium layer sandwiched between two phase-change medium layers for switching of the direction of reflectionless light propagation. We show that for this structure unidirectional reflectionlessness in the forward direction can be switched to unidirectional reflectionlessness in the backward direction at the optical communication wavelength by switching the phase-change material Ge2Sb2Te5 (GST) from its amorphous to its crystalline phase. We also show that it is the existence of exceptional points for this structure with GST in both its amorphous and crystalline phases which leads to unidirectional reflectionless propagation in the forward direction for GST in its amorphous phase, and in the backward direction for GST in its crystalline phase. Our results could be potentially important for developing a new generation of compact active free-space optical devices. We also show that phase-change materials can be used to switch photonic nanostructures between cloaking and superscattering regimes at mid-infrared wavelengths. More specifically, we investigate the scattering properties of subwavelength three-layer cylindrical structures in which the material in the outer shell is the phase-change material GST. We first show that, when GST is switched between its amorphous and crystalline phases, properly designed electrically small structures can switch between resonant scattering and cloaking invisibility regimes. The contrast ratio between the scattering cross sections of the cloaking invisibility and resonant scattering regimes reaches almost unity. We then also show that larger, moderately small cylindrical structures can be designed to switch between superscattering and cloaking invisibility regimes, when GST is switched between its crystalline and amorphous phases. The contrast ratio between the scattering cross sections of cloaking invisibility and superscattering regimes can be as high as ~ 93%. Our results could be potentially important for developing a new generation of compact reconfigurable optical devices.

SPIE Journal Paper | 28 August 2018 Open Access

High-speed alignment optimization of digital optical phase conjugation systems based on autocovariance analysis in conjunction with orthonormal rectangular polynomials

Ashton S. Hemphill, Yuecheng Shen, Jeeseong Hwang, Lihong V. Wang

JBO, Vol. 24, Issue 03, 031004, (August 2018) https://doi.org/10.1117/12.10.1117/1.JBO.24.3.031004

KEYWORDS: Spatial light modulators, Cameras, Scattering, Optical alignment, Phase conjugation, Light scattering, Mirrors, Scattering media, Wavefronts, Tissue optics

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Proceedings Article | 15 March 2018 Presentation

Imaging dichroism by photoacoustic computed tomography (Conference Presentation)

Yuan Qu, Lei Li, Yuecheng Shen, Junjie Yao, Terence T. Wong, Lihong Wang

Proceedings Volume 10494, 104941U (2018) https://doi.org/10.1117/12.2287432

KEYWORDS: Photoacoustic tomography, Dichroic materials, Tissue optics, Absorption, Tissues, Photoacoustic imaging, Anisotropy, Medical imaging, Polarization, Optical properties

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Proceedings Article | 15 March 2018 Presentation

Applying sub-Nyquist sampling in optical time-reversal-based wavefront shaping to boost targeted light transport through opaque scattering media (Conference Presentation)

Yuecheng Shen, Yan Liu, Cheng Ma, Lihong Wang

Proceedings Volume 10502, 105020Z (2018) https://doi.org/10.1117/12.2287064

KEYWORDS: Wavefronts, Light scattering, Opacity, Scattering media, Biomedical optics, Optical imaging, Phase conjugation, Tissue optics, Adaptive optics, Holographic interferometry

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Proceedings Article | 14 March 2018 Presentation

High-speed single-shot optical focusing through dynamic turbid media (Conference Presentation)

Ashton Hemphill, Yuecheng Shen, Yan Liu, Lihong Wang

Proceedings Volume 10502, 105020M (2018) https://doi.org/10.1117/12.2289306

KEYWORDS: Tissue optics, Soft tissue optics, Light scattering, Wavefronts, Biomedical optics, Adaptive optics, Phase conjugation, Holography, Scattering, Speckle

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Proceedings Article | 14 March 2018 Presentation

Focusing light through scattering media by polarization modulation based generalized digital optical phase conjugation (Conference Presentation)

Jiamiao Yang, Yuecheng Shen, Yan Liu, Ashton Hemphill, Lihong Wang

Proceedings Volume 10502, 105020L (2018) https://doi.org/10.1117/12.2287467

KEYWORDS: Modulation, Tissue optics, Polarization, Light scattering, Wavefronts, Scattering media, Phase conjugation, Spatial light modulators, Biomedical optics, Scattering

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SPIE Journal Paper | 10 January 2018 Open Access

Time-reversed ultrasonically encoded optical focusing through highly scattering ex vivo human cataractous lenses

Yan Liu, Yuecheng Shen, Haowen Ruan, Frank L. Brodie, Terence T. W. Wong, Changhuei Yang, Lihong V. Wang

JBO, Vol. 23, Issue 01, 010501, (January 2018) https://doi.org/10.1117/12.10.1117/1.JBO.23.1.010501

KEYWORDS: Wavefronts, Light scattering, Scattering, Retina, Spatial light modulators, Surgery, Ultrasonics, Tissue optics, Lenses, Cameras

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SPIE Journal Paper | 26 July 2017 Open Access

Multiview Hilbert transformation in full-ring transducer array-based photoacoustic computed tomography

Lei Li, Liren Zhu, Yuecheng Shen, Lihong Wang

JBO, Vol. 22, Issue 07, 076017, (July 2017) https://doi.org/10.1117/12.10.1117/1.JBO.22.7.076017

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Proceedings Article | 24 April 2017 Presentation

Focusing light inside dynamic scattering media with millisecond digital optical phase conjugation (Conference Presentation)

Yan Liu, Cheng Ma, Yuecheng Shen, Lihong Wang

Proceedings Volume 10073, 100730F (2017) https://doi.org/10.1117/12.2250042

KEYWORDS: Dynamic light scattering, Field programmable gate arrays, Diffusers, Phase conjugation, Tissue optics, Scattering media, Wavefronts, Light scattering, Spatial light modulators, Digital micromirror devices

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Proceedings Article | 21 February 2017 Presentation + Paper

Optical focusing through biological tissue and tissue-mimicking phantoms up to 9.6 centimeters thick with digital optical phase conjugation

Yuecheng Shen, Yan Liu, Cheng Ma, Lihong Wang

Proceedings Volume 10073, 100730G (2017) https://doi.org/10.1117/12.2251052

KEYWORDS: Tissue optics, Biomedical optics, Adaptive optics, Light scattering, Phase conjugation, Optical proximity correction, Scattering media, Laser tissue interaction, Optical imaging, Wavefronts, Scattering, Laser scattering, Speckle, Photons

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SPIE Journal Paper | 12 August 2016 Open Access

Focusing light through biological tissue and tissue-mimicking phantoms up to 9.6 cm in thickness with digital optical phase conjugation

Yuecheng Shen, Yan Liu, Cheng Ma, Lihong Wang

JBO, Vol. 21, Issue 08, 085001, (August 2016) https://doi.org/10.1117/12.10.1117/1.JBO.21.8.085001

KEYWORDS: Tissue optics, Wavefronts, Optical proximity correction, Scattering, Light scattering, Laser scattering, Signal to noise ratio, Cameras, Phase measurement, Phase conjugation

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Proceedings Article | 27 April 2016 Presentation

Bit-efficient sub-millisecond wavefront measurement using a lock-in camera for time-reversal based optical focusing inside scattering media (Conference Presentation)

Yan Liu, Cheng Ma, Yuecheng Shen, Lihong Wang

Proceedings Volume 9717, 97171J (2016) https://doi.org/10.1117/12.2211936

KEYWORDS: Cameras, Wavefronts, Scattering media, Biomedical optics, Optical imaging, Ultrasonics, Holography, Data conversion, Digital holography, Imaging systems

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Showing 5 of 16 publications

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