Author

# H. Raether

Bio: H. Raether is an academic researcher from University of Hamburg. The author has contributed to research in topic(s): Surface plasmon & Surface finish. The author has an hindex of 19, co-authored 33 publication(s) receiving 7438 citation(s). Previous affiliations of H. Raether include Munich University of Applied Sciences.
Topics: Surface plasmon
##### Papers
More filters

Book
03 May 1988
Abstract: Surface plasmons on smooth surfaces.- Surface plasmons on surfaces of small roughness.- Surfaces of enhanced roughness.- Light scattering at rough surfaces without an ATR device.- Surface plasmons on gratings.- Conclusions.

4,708 citations

Book ChapterDOI
01 Jan 1988

5 citations

Book ChapterDOI
01 Jan 1988

335 citations

Book ChapterDOI
01 Jan 1988

1 citations

Book ChapterDOI
01 Jan 1988

235 citations

##### Cited by
More filters

Journal ArticleDOI
Marco Vallone1, Alberto Tibaldi1, Stefan Hanna, Anne Wegmann  +5 moreInstitutions (1)
Abstract: Multiphysics modeling of a planar HgCdTe-based mid-wavelength infrared (MWIR) focal plane array with $3\,\mu$ m-wide pixels enlightens the role of surface plasmon-polaritons observed in gold nanorods arranged on its illuminated face. Simulations indicate that the proposed plasmonic detector, which employs a $1\,\mu$ m-thick absorber layer, exhibits a reduction of diffusive inter-pixel crosstalk by more than one order of magnitude with respect to more conventional, non-plasmonic detectors with a $5\,\mu$ m-thick absorber layer, without penalizing responsivity and achieving increased detectivity in the whole MWIR band by taking advantage of the absorber volume reduction.

Journal ArticleDOI
Naeem Iqbal1, Naeem Iqbal2, Sen Zhang2, Pankaj Kumar Choudhury3  +2 moreInstitutions (3)
Abstract: Near-field radiation heat transfer (NFRHT) in two-dimensional (2D) hexagonal boron nitride (hBN) monolayer and its composite symmetric-based structure was investigated. Contrary to three-dimensional (3D) materials, the splitting of modes (in 2D materials) into the longitudinal optical (LO) and transverse optical (TO) phononic modes disappears at the Γ-point even in some polar materials. The conductivity of atomic thin hBN monolayer depends on the LO phonon frequency under the long wavelength limit. Exploiting such concept, the electromagnetic local density of states (EM-LDOS) accounting for the near-field radiation spectrum was evaluated in free-space close to an interface with the hBN monolayer as well as composite structures. An intense narrow peak of LDOS was found in the case of hBN monolayer caused by the surface phonon polariton (SPhP) resonance. This peak was modified in the case of hBN-graphene composite due to hybridization, which strongly depends on two factors – the distance of observer (in vacuum) from interface and graphene Fermi energy. It was found that the flux density between monolayer hBN gets 2.8-fold enhanced as compared to the monolayer graphene configuration under 0.11 eV Fermi energy applied at a vacuum gap of 15 nm. The possibility of tuning Fermi energy has great potentials in designing thermally controlled devices.

1 citations

Journal ArticleDOI
Yun Wu1, Xie Zeng1, Qiaoqiang Gan1Institutions (1)
Abstract: Exosomes are nanosized (50-150 nm) extracellular vesicles released by all types of cells in the body. They transport various biological molecules, such as DNAs, RNAs, proteins, and lipids from parent cells to recipient cells for intercellular communication. Exosomes, especially those from tumor cells, are actively involved in caner development, metastasis, and drug resistance. Recently, many studies have shown that exosomal proteins are promising biomarkers for cancer screening, early detection and prognosis. Among many detection techniques, surface plasmon resonance (SPR) is a highly sensitive, label-free, and real-time optical detection method. Commercial prism-based wavelength/angular-modulated SPR sensors afford high sensitivity and resolution, but their large footprint and high cost limit their adaptability for clinical settings. We have developed an intensity-modulated, compact SPR biosensor (25 cm × 10 cm × 25 cm) for the detection of exosomal proteins. We have demonstrated the potential application of the compact SPR biosensor in lung cancer diagnosis using exosomal epidermal growth factor receptor (EGFR) and programmed death-ligand 1 (PD-L1) as biomarkers. The compact SPR biosensor offers sensitive, simple, fast, user-friendly, and cost-effective detection of exosomal proteins, which may serve as an in vitro diagnostic test for cancer.

Book ChapterDOI
01 Jan 2022
Abstract: A surface plasmon resonance waveguide sensor operating in the visible wavelength range is presented for refractive index-based sensing. The silver material is used because of its chemical stability and its strong electromagnetic fields on surface of the nanoparticle. The simulation and modeling of surface plasmon resonance sensor are discussed. The aluminum oxide surface coating material improves the resonance of the sensor because of its stable material properties in optical and chemical application. The three modes of the sensor discussed here are transfer electric, transfer magnetic and the surface plasmon waveguide mode. The effective index value of 1.5178 is observed for the surface plasmon mode of the SPR waveguide sensor. The attenuation loss of 21 dB/cm is obtained at visible wavelength. The sensitivity when averaged for two analyte refractive index is 354 nm/refractive index unit (RIU). The proposed surface plasmons resonance sensor is used as refractive index-based sensor for environmental and chemical monitoring. This proposed work can be used to sense analyte refractive index based on the variation of the change in the resonant wavelength.

Journal ArticleDOI
Abstract: Two structures of graphene-silver asymmetric grating surface plasmon resonance sensors with high sensitivity were presented. In Structure 1, the air, with a thickness of 100 nm, was located on the sensing medium; while, Structure 2 has become small with ignoring the air. The sensitivity of both sensors was calculated through the alteration of the wavelength peak of the extinction curve in minor variability of refractive index of the sensing medium. The sensitivity of Structure 1 and Structure 2 was 880 nm/RIU and 1742 nm/RIU, respectively. By comparing the different sensors, it should be noted that the ability to reach a small-sized sensor with a high performance (Structure 2) is the center of researchers' attention. Also, these two SPR sensors could detect most gases with a refractive index from 1.000 to 1.500 such as CO2, CS2, SO2, and so on, with high precision.

1 citations

##### Network Information
###### Related Authors (2)
G. Meyer

7 papers, 98 citations

100% related
M. Horstmann

9 papers, 81 citations

100% related
##### Performance
###### Metrics

Author's H-index: 19

No. of papers from the Author in previous years
YearPapers
19885
19841
19831
19821
19811
19801