Controlling Amplitude and Radiation Pattern of Emitted Terahertz by Group Velocity Mismatch

Sobhani, Hassan; Zakeri-Khatir, H.; Firouzjaei, Ali Shekari

doi:10.1109/tap.2018.2854304

Cited by 9 publications

(7 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For biosensor applications, the use of the proposed CRR sensor may allow the detection of small biomolecules. Furthermore, owing to non-ionizing characteristics and high penetrating power of terahertz (THz) waves, the THz generation is of great interest (Sobhani et al , 2016b; Sobhani et al , 2016a; Sobhani et al , 2016c; Sobhani, 2017a; Sobhani et al , 2016d; Sobhani et al , 2017a; Sobhani et al , 2017b; Sobhani et al , 2017c; Sobhani, 2017b; Sobhani, 2017c; Sobhani et al , 2018a; Sobhani et al , 2018b; Sobhani and Zohrabi, 2018). We are currently investigating the designing of a high-sensitivity sensor in the THz domain which is based on reflection-type MRRs.…”

Section: Discussionmentioning

confidence: 99%

Design and analysis of all optical biochemical sensors based on the coupled-ring reflectors

Feili

Sabouhi

Sobhani

et al. 2019

Self Cite

View full text Add to dashboard Cite

Purpose This study aims to propose a new scheme for designing a high-sensitivity optical biosensor. For this, two agents have been considered: reflection-type micro-resonators, which filter the noise of the pump, and coupled-ring reflectors (CRRs), which are coupled to partial reflecting elements in the bus waveguide to create Fano-resonance. These two agents improve the sensor sensitivity and have low-power optical switching/modulation. Design/methodology/approach The proposed model is based on the coupling of the CRRs with the Fabry–Pérot cavity. The slope of the Fano-resonance line shape and consequently the sensitivity of the proposed CRRs are higher than those of conventional microring resonators. Findings The proposed scheme has many characteristics: CRRs have been used to create a higher slope of the Fano-resonance line shape; the sensitivity of the sensor shows improvement on the basis of reflection-type micro-resonators and by the removal of the pump noise; the designed sensor has low-power optical switching/modulation; and the modeling and designing of a novel high-sensitivity resonator is based on coupling the CRRs with the Fabry–Pérot cavity. Originality/value This study has proposed a new scheme for designing a high-sensitivity optical biosensor. This method is based on the improvement of the sensitivity by two agents: reflection-type micro-resonators, which filter the noise of the pump, and coupled-ring reflectors, which are coupled to partial reflecting elements in the bus waveguide to create Fano-resonance.

show abstract

Section: Discussionmentioning

confidence: 99%

Design and analysis of all optical biochemical sensors based on the coupled-ring reflectors

Feili

Sabouhi

Sobhani

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…We propose different methods for solving the problem of antenna synthesis, which are reduced to the search for a stationary point of functional (5). For example, it is naturally to apply the iterative process of the gradient method for both the unknowns u and λ :…”

Section: Usual Iterative Methodsmentioning

confidence: 99%

“…where λ is the Lagrange multiplier, which along with f is also be determined from the minimum of the functional (5).…”

Section: Formulation Of the Problemmentioning

confidence: 99%

“…The Euler equation for functional (5) One should note that at 0 λ = and fixed α Equation 28has only a zero solution for small c. This is due to the fact that the second term in the functional (5) is dominant for small c. At the fixed c, the current norm is almost independent on α for the solutions of all types. This is explained by the fact that this norm is essentially determined by the norm of the synthesized RP, which is fixed in our statement.…”

Section: Linear Antennamentioning

confidence: 99%

“…In the process of design the various radiating systems, in particular antennas and arrays, requirements are imposed mainly on the amplitude or power RP; the phase characteristic (the argument of complex RP) remains free of any requirements. The antenna synthesis problems according to amplitude characteristics are extensively investigating in the recent decade for plane arrays with different geometries [1] [2] [3], for the case of specific form of the given RP [4], as wells as due to moving the antenna techniques to new perspective THz range of frequencies [5].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Radiation System Synthesis by the Power Criterion as a Problem of Optimization with Restrictions

Andriychuk¹,

Podlevskyi²

2018

JAMP

View full text Add to dashboard Cite

A nonlinear synthesis problem of antennas according to the prescribed power (squared amplitude) radiation pattern (RP) is considered in the variational statement that yields in the possibility to take into account an additional restriction to the synthesized power RP. The problem of synthesis consists of finding such currents in antenna, which generates the RP with the best approximation to the given one. The respective Euler's equation is reduced on the basis of used functional. This is nonlinear integral equation of Hammerstein's type. The effective numerical methods are elaborated and applied for its solving. The computational results verify the effectiveness of approach proposed.

show abstract

Creation of tunable longitudinally polarized terahertz pulse carrying orbital angular momentum

Sobhani

2021

Physics Letters A

View full text Add to dashboard Cite

Controlling Amplitude and Radiation Pattern of Emitted Terahertz by Group Velocity Mismatch

Cited by 9 publications

References 34 publications

Design and analysis of all optical biochemical sensors based on the coupled-ring reflectors

Design and analysis of all optical biochemical sensors based on the coupled-ring reflectors

The Radiation System Synthesis by the Power Criterion as a Problem of Optimization with Restrictions

Creation of tunable longitudinally polarized terahertz pulse carrying orbital angular momentum

Contact Info

Product

Resources

About