The scheme of a generation of ultrasound waves based on optically excited Tamm plasmon structures is proposed. It is shown that Tamm plasmon structures can provide total absorption of a laser pulse with arbitrary wavelength in a metallic layer providing the possibility of the use of an infrared semiconductor laser for the excitation of ultrasound waves. Laser pulse absorption, heat transfer and dynamical properties of the structure are modeled, and the optimal design of the structure is found. It is demonstrated that the Tamm plasmon-based photoacoustic generator can emit ultrasound waves in the frequency band up to 100 MHz with predefined frequency spectrum.
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http://dx.doi.org/10.1364/OE.400639 | DOI Listing |
Sci Rep
January 2025
Physics Department, Faculty of Sciences, TH-PPM Group, Beni-Suef University, Beni Suef, 62514, Egypt.
This theoretical work focuses on the application of Tamm resonance-based biosensing using a one-dimensional photonic crystal for detecting skin vitiligo, a condition caused by the loss of pigment in the body. This biosensor utilizes the interaction of light with the photonic structure to identify the specific biomarkers associated with vitiligo. The proposed structure is composed of prism/Ag/skin-sample/(GaP/PS)/glass.
View Article and Find Full Text PDFNanophotonics
July 2024
College of Electronic Engineering, South China Agricultural University, Guangzhou, 510642, China.
Adv Mater
December 2024
Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore, 138634, Singapore.
The phase singularity, a sudden phase change occurring at the reflection zero is widely explored using various nanophotonic systems such as metamaterials and thin film cavities. Typically, these systems exhibit a single reflection zero with a phase singularity at a specific incident angle, particularly at larger angles of incidence (>50 degrees). However, achieving multiple phase singularities at a single incident angle remains a formidable challenge.
View Article and Find Full Text PDFIn this Letter, we report TAMM plasmonic polaritons (TPPs) generated by few-layer MoS with a distributed Bragg reflector (DBR) structure in the terahertz frequency region by utilizing the transfer matrix method (TMM) and finite element method (FEM). By inserting a mono-graphene embedded cavity layer, we realize the graphene-induced mode strong coupling (GCM), which is a strategy of a refractive index sensor by optimizing the cavity layer spacing. By adjusting the chemical potential of graphene, GCM is modulated.
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