Outputs (21)

Effect of skin color on optical properties and the implications for medical optical technologies: a review (2024)
Journal Article
Setchfield, K., Gorman, A., Simpson, A. H. R. W., Somekh, M. G., & Wright, A. J. (2024). Effect of skin color on optical properties and the implications for medical optical technologies: a review. Journal of Biomedical Optics, 29(01), Article 010901. https://doi.org/10.1117/1.jbo.29.1.010901

Significance: Skin color affects light penetration leading to differences in its absorption and scattering properties. COVID-19 highlighted the importance of understanding of the interaction of light with different skin types, e.g., pulse oximetry (P... Read More about Effect of skin color on optical properties and the implications for medical optical technologies: a review.

Relevance and utility of the in-vivo and ex-vivo optical properties of the skin reported in the literature: a review [Invited] (2023)
Journal Article
Setchfield, K., Gorman, A., Simpson, A. H. R. W., Somekh, M. G., & Wright, A. J. (2023). Relevance and utility of the in-vivo and ex-vivo optical properties of the skin reported in the literature: a review [Invited]. Biomedical Optics Express, 14(7), 3555-3583. https://doi.org/10.1364/boe.493588

Imaging non-invasively into the human body is currently limited by cost (MRI and CT scan), image resolution (ultrasound), exposure to ionising radiation (CT scan and X-ray), and the requirement for exogenous contrast agents (CT scan and PET scan). Op... Read More about Relevance and utility of the in-vivo and ex-vivo optical properties of the skin reported in the literature: a review [Invited].

Near-field manipulation of Tamm plasmon polaritons (2023)
Journal Article
Li, N., Zou, Q., Zhao, B., Min, C., Yuan, X., Somekh, M., & Feng, F. (2023). Near-field manipulation of Tamm plasmon polaritons. Optics Express, 31(5), 7321-7335. https://doi.org/10.1364/OE.481440

Tamm plasmon polaritons (TPPs) arise from electromagnetic resonant phenomena which appear at the interface between a metallic film and a distributed Bragg reflector. They differ from surface plasmon polaritons (SPPs), since TPPs possess both cavity m... Read More about Near-field manipulation of Tamm plasmon polaritons.

Design of a dynamic multi-topological charge graphene orbital angular momentum metalens (2023)
Journal Article
Cao, G., Lin, H., Jia, B., Yuan, X., Somekh, M., & Wei, S. (2023). Design of a dynamic multi-topological charge graphene orbital angular momentum metalens. Optics Express, 31(2), 2102-2111. https://doi.org/10.1364/OE.480946

Traditional OAM generation devices are bulky and can generally only create OAM with one specific topological charge. Although metasurface-based devices have overcome the volume limitations, no tunable metasurface-based OAM generators have been demons... Read More about Design of a dynamic multi-topological charge graphene orbital angular momentum metalens.

Non-iterative aberration retrieval based on the spot shape around focus (2022)
Journal Article
Smid, P., See, C. W., Somekh, M. G., & Wright, A. J. (2022). Non-iterative aberration retrieval based on the spot shape around focus. Optics and Lasers in Engineering, 157, Article 107108. https://doi.org/10.1016/j.optlaseng.2022.107108

A non-iterative, robust, aberration retrieval method to determine primary aberrations by utilizing the intensity distribution at and around focus is presented. The primary Zernike aberrations (coma, spherical aberration and astigmatism) are retrieved... Read More about Non-iterative aberration retrieval based on the spot shape around focus.

Analysis of Open Grating-Based Fabry–Pérot Resonance Structures With Potential Applications for Ultrasensitive Refractive Index Sensing (2021)
Journal Article
Sasivimolkul, S., Pechprasarn, S., & Somekh, M. G. (2021). Analysis of Open Grating-Based Fabry–Pérot Resonance Structures With Potential Applications for Ultrasensitive Refractive Index Sensing. IEEE Sensors Journal, 21(9), 10628-10636. https://doi.org/10.1109/jsen.2021.3063136

We report a theoretical framework to explain the characteristics of Fabry-Pérot (FP) resonances excited in a thin film-based grating consisting of a thin gold layer and a rectangular dielectric grating in the sub-wavelength and near-wavelength gratin... Read More about Analysis of Open Grating-Based Fabry–Pérot Resonance Structures With Potential Applications for Ultrasensitive Refractive Index Sensing.

Comments on 'Rapid Image Reconstruction of Structured Illumination Microscopy Directly in the Spatial Domain' (2021)
Journal Article
Somekh, M. (2021). Comments on 'Rapid Image Reconstruction of Structured Illumination Microscopy Directly in the Spatial Domain'. IEEE Photonics Journal, 13(2), https://doi.org/10.1109/JPHOT.2021.3059562

This comment shows that the formulation used in the above paper has been presented in virtually the same form in a previous paper. The comment also emphasizes that spatial domain reconstruction for structured light microscopy is a useful supplement t... Read More about Comments on 'Rapid Image Reconstruction of Structured Illumination Microscopy Directly in the Spatial Domain'.

On-chip plasmonic spin-Hall nanograting for simultaneously detecting phase and polarization singularities (2020)
Journal Article
Feng, F., Si, G., Min, C., Yuan, X., & Somekh, M. (2020). On-chip plasmonic spin-Hall nanograting for simultaneously detecting phase and polarization singularities. Light: Science and Applications, 9(1), Article 95. https://doi.org/10.1038/s41377-020-0330-z

Phase and polarization singularities are important degrees of freedom for electromagnetic field manipulation. Detecting these singularities is essential for modern optics, but it is still a challenge, especially in integrated optical systems. In this... Read More about On-chip plasmonic spin-Hall nanograting for simultaneously detecting phase and polarization singularities.

Defocus leakage radiation microscopy for single shot surface plasmon measurement (2020)
Journal Article
Chow, T. W. K., Lun, D. P. K., Pechprasarn, S., & Somekh, M. G. (2020). Defocus leakage radiation microscopy for single shot surface plasmon measurement. Measurement Science and Technology, 31(7), Article 075401. https://doi.org/10.1088/1361-6501/ab7def

Measurement of surface plasmon and surface wave propagation is important for the operation and characterization of sensors and microscope systems. One challenge is to perform these measurements both quickly and with good spatial resolution without an... Read More about Defocus leakage radiation microscopy for single shot surface plasmon measurement.

A General Description of the Performance of Surface Plasmon Sensors Using a Transmission Line Resonant Circuit Model (2019)
Journal Article
Shen, M., & Somekh, M. G. (2019). A General Description of the Performance of Surface Plasmon Sensors Using a Transmission Line Resonant Circuit Model. IEEE Sensors Journal, 19(23), 11281-11288. https://doi.org/10.1109/jsen.2019.2933320

We analyze the response of surface plasmon (SP) sensors using a transmission line model. We illustrate this analysis with particular reference to a layered structure in which plasmon hybridization occurs. By applying the appropriate resonant conditio... Read More about A General Description of the Performance of Surface Plasmon Sensors Using a Transmission Line Resonant Circuit Model.