scholarly journals Large Near-Field Enhancement in Terahertz Antennas by Using Hyperbolic Metamaterials with Hole Arrays

2019 ◽  
Vol 9 (12) ◽  
pp. 2524 ◽  
Author(s):  
Cong Cheng ◽  
Wei Chen ◽  
Yuanfu Lu ◽  
Fangming Ruan ◽  
Guangyuan Li
Keyword(s):  
Electric Field ◽  
Field Component ◽  
Near Field ◽  
Field Enhancement ◽  
Dipole Antenna ◽  
Electric Field Component ◽  
Strong Light ◽  
Hyperbolic Metamaterials ◽  
Novel Approach ◽  
Hole Arrays

Terahertz antennas can greatly enhance the near fields and enable strong light–matter interactions, and thus have been widely used in applications such as terahertz sensing and detection. Here we propose a novel approach to further enhance the near fields in terahertz antennas. We show that by sandwiching hyperbolic metamaterials that are composed of InSb and SiO 2 multilayer and that are dressed with hole arrays, between a terahertz dipole antenna and the substrate, the near-field electric field intensities in the antenna can be further enhanced by more than three times. Simulations reveal that this enhancement originates from the doubly enhanced in-plane electric field component and the significantly enhanced out-of-plane electric field component. We expect this work will advance the design of terahertz antennas that are widely used in sensors and detectors.

scholarly journals Optical Anapole Modes in Gallium Phosphide Nanodisk with Forked Slits for Electric Field Enhancement

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1490
Author(s):  
Jingwei Lv ◽  
He Zhang ◽  
Chao Liu ◽  
Zao Yi ◽  
Famei Wang ◽  
...  
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Hot Spots ◽  
Gallium Phosphide ◽  
Physical Phenomenon ◽  
Near Field ◽  
Field Enhancement ◽  
High Refractive Index ◽  
Novel Approach ◽  
New Frontier

High refractive index dielectric nanostructures represent a new frontier in nanophotonics, and the unique semiconductor characteristics of dielectric systems make it possible to enhance electric fields by exploiting this fundamental physical phenomenon. In this work, the scattered radiation spectral features and field-enhanced interactions of gallium phosphide disks with forked slits at anapole modes are investigated systematically by numerical and multipole decomposition analyses. Additional enhancement of the electric field is achieved by opening the forked slits to create high-intensity hot spots inside the disk, and nearby molecules can access these hot spots directly. The results reveal a novel approach for near-field engineering such as electric field localization, nonlinear optics, and optical detection.

scholarly journals NMR-based metabolomics with enhanced sensitivity

RSC Advances ◽  
2021 ◽  
Vol 11 (15) ◽  
pp. 8694-8700
Author(s):  
Kousik Chandra ◽  
Samah Al-Harthi ◽  
Sujeesh Sukumaran ◽  
Fatimah Almulhim ◽  
Abdul-Hamid Emwas ◽  
...  
Keyword(s):  
Electric Field ◽  
Field Component ◽  
Electric Field Component ◽  
Spin Noise ◽  
Enhanced Sensitivity ◽  
Shaped Tube

We combined Spin Noise Tuning Optimum (SNTO) and electric field component-optimized shaped tube to boost sensitivity for NMR-based metabolomics.

ON OPTIMUM PUPIL FIELDS WITH MAXIMUM ELECTRIC FIELD COMPONENT IN FOCUS

2010 ◽  
Vol 19 (01) ◽  
pp. 189-201
Author(s):  
H. P. URBACH ◽  
S. F. PEREIRA ◽  
D. J. BROER
Keyword(s):  
Electric Field ◽  
Field Component ◽  
Optical Axis ◽  
Focal Point ◽  
Longitudinal Component ◽  
Electric Field Component ◽  
Incident Power ◽  
Entrance Pupil ◽  
Maximum Electric Field ◽  
High Na Lens

The field in the entrance pupil of a high NA lens can be optimized such that, for given incident power, the electric field component in a given direction in the focal point is maximum. If the field component is chosen parallel to the optical axis, the longitudinal component is maximized and it is found that the optimum longitudinal component is narrower than the Airy spot. We discuss how this can be used to obtain higher resolution in photolithography when a resist is used that is sensitive to only the longitudinal component. We describe a proposition for realizing such resist.

scholarly journals Terahertz quantum plasmonics at nanoscales and angstrom scales

Nanophotonics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 435-451 ◽  
Author(s):  
Taehee Kang ◽  
Young-Mi Bahk ◽  
Dai-Sik Kim
Keyword(s):  
Electron Tunneling ◽  
Strong Field ◽  
Field Enhancement ◽  
Dipole Antenna ◽  
Strong Light ◽  
Metallic Structures ◽  
Terahertz Pulses ◽  
Matter Interaction ◽  
Light Matter Interaction ◽  
Quantum Phenomena

AbstractThrough the manipulation of metallic structures, light–matter interaction can enter into the realm of quantum mechanics. For example, intense terahertz pulses illuminating a metallic nanotip can promote terahertz field–driven electron tunneling to generate enormous electron emission currents in a subpicosecond time scale. By decreasing the dimension of the metallic structures down to the nanoscale and angstrom scale, one can obtain a strong field enhancement of the incoming terahertz field to achieve atomic field strength of the order of V/nm, driving electrons in the metal into tunneling regime by overcoming the potential barrier. Therefore, designing and optimizing the metal structure for high field enhancement are an essential step for studying the quantum phenomena with terahertz light. In this review, we present several types of metallic structures that can enhance the coupling of incoming terahertz pulses with the metals, leading to a strong modification of the potential barriers by the terahertz electric fields. Extreme nonlinear responses are expected, providing opportunities for the terahertz light for the strong light–matter interaction. Starting from a brief review about the terahertz field enhancement on the metallic structures, a few examples including metallic tips, dipole antenna, and metal nanogaps are introduced for boosting the quantum phenomena. The emerging techniques to control the electron tunneling driven by the terahertz pulse have a direct impact on the ultrafast science and on the realization of next-generation quantum devices.

Direct observation of a tangential electric field component at the magnetopause

1979 ◽  
Vol 6 (4) ◽  
pp. 305-308 ◽  
Author(s):  
F. S. Mozer ◽  
R. B. Torbert ◽  
U. V. Fahleson ◽  
C.-G. Fälthammar ◽  
A. Gonfalone ◽  
...  
Keyword(s):  
Electric Field ◽  
Direct Observation ◽  
Field Component ◽  
Electric Field Component ◽  
Tangential Electric Field
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