کنفرانس مهندسی برق ایران

صفحه اصلی / بیست و نهمین کنفرانس مهندسی برق ایران

Design of a highly efficient photoconductive terahertz modulator enhanced by photonic crystal resonant cavity

نویسندگان :

Faramarz Alihosseini¹ Zahra Heshmatpanah² Hesam Zandi³

1- دانشگاه صنعتی خواجه نصیرالدین طوسی 2- دانشگاه صنعتی خواجه نصیرالدین طوسی 3- دانشگاه صنعتی خواجه نصیرالدین طوسی

کلمات کلیدی :

modulator, photonic crystal, conductivity, modulation depth, modulation speed

چکیده :

We propose and numerically investigate an optically-controlled terahertz (THz) modulator based on photocarrier generation in GaAs, incorporated with photonic crystal cavity-waveguide coupling structure. Here, we demonstrate the intensity of THz traveling-wave can be tuned by varying the conductivity of the GaAs through an infrared optical pumping. This modulator benefits from strong interaction between THz wave and photoconductive material for achieving deep modulation with GHz modulation rate even with low pumping power. We analyze the device properties in time and frequency domains using the finite element method (FEM). Simulation results indicate that when the optical pump fluence is tuned from 3 nJ/cm2 to 10 nJ/cm2 this modulator can operate with a high modulation depth from 81.6% to 98.2% and also a high modulation rate up to 3 GHz for at 1 THz.

لیست مقالات

لیست مقالات بایگانی شده

Control of vienna rectifier with Discontinuous space vector modulation based on circuit level decoupling

Ali Roshandel - Mohammad Roshandel - Ebrahim Afjei

An Analysis of Nash Equilibrium Learning through Myopic Decision-making in Incomplete Information Double Sided Auction Games within Markets

Hesam Farzaneh - Parsa Zholideh

Community Energy Management Using MARL: Synergy of Price-Based and Incentive-Based Demand Response

Mohammad Hashemnezhad - Hamed Delkhosh - Ahmad Shahabi - Mohsen Parsa Moghaddam

A Hybrid Computer-aided Diagnosis System For Central Obesity Screening In A Large Sample Of Iranian Children and Adolescents

Amirhossein Koochekian - Morteza Farahi - Hamid Reza Sadr manouchehri Naeini - Mohammad Reza Mohebian - Hamid Reza Marateb - Marjan Mansourian - Roya Kelishadi

High-sensitive symmetric Fano optical cavity sensor for refractive index detection based on photonic crystal structure

Mohammad Hasan Rezaei - Mohammad Hasan Yavari

Study of an Improved Flux Reversal Permanent Magnet Outer-Rotor Motor

Mohammad Reza Sarshar - Mohammad Amin Jalali Kondelaji - Mojtaba Mirsalim

Effect of Passivation on the Structural and Electronic Properties of Armchair MoSe2 Nanoribbons: A First-Principles Investigation

ََAmirreza Ghazi - Arash Yazdanpanah

Design and Implementation of a TEM Double-ridge Horn Antenna for Ultra-Wideband Applications

Seyed Navid Seyfossadat - Hassan Zakeri - Ahad Tavakoli - Gholamreza Moradi

Modeling and optimal control of the vibration model of constrained buildings based on fractional order singular theory using orthogonal polynomials

Vahid Safari Dehnavi - Masoud Shafiee

Covert Communication and Secure Transmission in the Presence of Multiple Antenna Untrusted Relay

Mohammad Reza Yari - Paeiz Azmi - Mahyar Ghasedi - Moslem Forouzesh - Hamid Saeedi

بیشتر