Graphene‐based THz modulator analysed by equivalent circuit model

Equivalent Circuit Model for Square Ring Slot Frequency Selective Surface

An equivalent circuit model for predicting the frequency response of a square ring slot frequency selective surface (SRS-FSS) for normal incidence is described. The proposed FSS consists of an array of square patches centered within a wire grid. The presented circuit model is formed by the impedance of the wire grid that is parallel with the impedance of the patch array, also the mutual couplin...

Study of Plasma Effects in HEMT-like Structures for THz Applications by Equivalent Circuit Approach

Design of a Single-Layer Circuit Analog Absorber Using Double-Circular-Loop Array via the Equivalent Circuit Model

A broadband Circuit Analogue (CA) absorber using double-circular-loop array is investigated in this paper. A simple equivalent circuit model is presented to accurately analyze this CA absorber. The circuit simulation of the proposed model agrees well with full-wave simulations. Optimization based the equivalent circuit model, is applied to design a single-layer circuit analogue absorber using d...

High - efficiency broadband THz wave modulator

We report a high efficiency, broadband terahertz (THz) modulator following a study of phthalocyanine-compound organic films irradiated with an external excitation laser. Both transmission and reflection modulations of each organic/silicon bilayers were measured using THz time-domain and continuous-wave systems. For very low intensities, the experimental results show that AlClPc/Si can achieve a...

17 THz Continuous - Wave Optical Modulator

We use coherently rotating hydrogen molecules and demonstrate a continuous-wave (CW) optical modulator at a frequency of 17.6 THz that can modulate any laser within the optical region of the spectrum. The molecules are prepared in a coherent state by using two intense laser beams spaced by the Raman transition frequency inside a high finesse cavity. PACS numbers: 42.65.Dr, 42.65.Re, 42.50.Gy