Search results
Search for "light confinement" in Full Text gives 9 result(s) in Beilstein Journal of Nanotechnology.
Observation of multiple bulk bound states in the continuum modes in a photonic crystal cavity
Beilstein J. Nanotechnol. 2023, 14, 544–551, doi:10.3762/bjnano.14.45
- the unit cell and the outgoing radiation [18][23][33] or from the destructive interference of two or more leaky waves that cancel each other in the far field [15][16][34]. PhC-based BIC devices have recently attracted great attention since they can achieve both large-Q resonances and strong light
- confinement in a relatively simple way. Such strong resonances endow PhC-based BIC devices with a strong enhancement of light–matter interaction, indicating great potential for applications in ultrasensitive molecular fingerprint detection [12][13][35], hyperspectral biosensing imaging [36], novel flat light
Tunable high-quality-factor absorption in a graphene monolayer based on quasi-bound states in the continuum
Beilstein J. Nanotechnol. 2022, 13, 675–681, doi:10.3762/bjnano.13.59
- perfect light confinement and giant field enhancement [25][26][27][28][29]. Hence, quasi-BICs can be utilized to design narrow-band absorbers with high Q-factor. Tunable absorption is interesting regarding many potential applications. There are generally two ways to achieve tunable absorption. One is to
Zinc oxide nanostructures for fluorescence and Raman signal enhancement: a review
Beilstein J. Nanotechnol. 2022, 13, 472–490, doi:10.3762/bjnano.13.40
- promoted strong light confinement, and the increased number of adsorption sites due to the branched ZnO nanostructures. Despite the fact that ZnO is a non-plasmonic semiconductor material, it can elicit a degree of SERS effect via chemical enhancement of atomic vibrational modes of the analyte. Kim et al
Dumbbell gold nanoparticle dimer antennas with advanced optical properties
Beilstein J. Nanotechnol. 2018, 9, 2188–2197, doi:10.3762/bjnano.9.205
- likely caused by distinct deviations of the gap geometry arising from the faceted structure of the applied colloidal AuNPs. Keywords: atomistic plasmonics; dumbbell dimer antennas; electromagnetic field enhancement; light confinement; nanolens; nanoscale morphology; Introduction The introduction of the
- applications, is the ability of optical antennas to provide a high signal enhancement ratio and light confinement across the UV–vis–NIR spectral range. The development of new configurations has always come along with the question of fundamental limitations in regard to the obtainable electromagnetic field
- procedure. Approximation of the electromagnetic field enhancement by measuring the fluorescence of high-QY emitters Tip-supported AuNP monomers and dimers are characterized for the provided electromagnetic field enhancement and light confinement capabilities by probing the fluorescence enhancement of
Surface characterization of nanoparticles using near-field light scattering
Beilstein J. Nanotechnol. 2018, 9, 1228–1238, doi:10.3762/bjnano.9.114
- iron oxide nanoparticles (IPC-SPIOs). Nanophotonic force microscopy pushes particles against a waveguide surface, optically trapping the particles by light confinement [10][19][20]. The evanescent fields are created by the waveguide, and there are four forces operating on the field: the gradient force
Design of photonic microcavities in hexagonal boron nitride
Beilstein J. Nanotechnol. 2018, 9, 102–108, doi:10.3762/bjnano.9.12
- effect of the thickness of the 2D photonic crystal slab as is shown in Figure 2b. The simulated slab thickness is varied up to 300 nm since that is a realistic thickness of typical hBN flakes prepared by the scotch tape exfoliation method. Thicker slabs exhibit stronger light confinement, which results
Mapping of plasmonic resonances in nanotriangles
Beilstein J. Nanotechnol. 2013, 4, 588–602, doi:10.3762/bjnano.4.66
- scattering [3][4] and extreme light confinement for nonlinear effects [5][6][7]. While the basic principles of computing plasmonic resonances are well understood (i.e., by using Maxwell´s equations on small objects), it has proven to be difficult to predict the field distribution for a given nanoscopic
Diamond nanophotonics
Beilstein J. Nanotechnol. 2012, 3, 895–908, doi:10.3762/bjnano.3.100
- structure with one-dimensional confinement of light. In order to achieve a three-dimensional light confinement, pillar microcavities are milled out of the planar structure by focused ion beam. As a consequence, the light field is concentrated vertically between the two dielectric Bragg mirrors and laterally
Plasmonic nanostructures fabricated using nanosphere-lithography, soft-lithography and plasma etching
Beilstein J. Nanotechnol. 2011, 2, 448–458, doi:10.3762/bjnano.2.49
- can be utilized in experiments requiring light confinement. Keywords: nanosphere-lithography; near-field enhancement; plasma etching; soft-lithography; surface plasmons; Introduction Classical electromagnetic theories describing optical transmission through small apertures [1][2] do not take into
- reflectance decreased with increasing pattern diameter. For 500 nm patterns no diffraction is expected for λ > 500 nm. Therefore, most of the light was absorbed. Investigations of gratings and small cavities of various shapes have demonstrated strong light confinement [10][61][62][63][64][65]. Thus, etched
- coated PS spheres of the same size, indicate an enhanced absorbance, which may be due to light confinement effects. Films of other materials and heterogeneous metal–insulator–metal films, of great importance in plasmonics, may be prepared in the future as well. For a better understanding, however
Other Beilstein-Institut Open Science Activities
