0% Complete
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 Alihosseini
1
Zahra Heshmatpanah
2
Hesam Zandi
3
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
Robust H∞ Control Design for Variable-Speed Wind Turbines Using Bilinear Matrix Inequalities
Hamidreza Javanmardi - Alireza Hamedi - Mahya Rahimzadeh
Ultrahigh Step-Up Non-Isolated DC-DC Converter Based on Quadratic Converter without Coupled Inductor
Sajad Rostami - Vahid Abbasi - Masoumeh Parastesh
Modulation Classification with Convolutional Neural Network based Deep Learning in Elastic Optical Network
Ehsan Varasteh - Seyed Sadra Kashef - Morteza Valizadeh - Mehdi Ranjbar Zefreh
Full Soft Switching Interleaved High Voltage Gain Converter For Renewable Energy Systems
Baharak Akhlaghi
تخمین کانال متغیربازمان در سیستمهای MIMO – موجمیلیمتری چندکاربره
زهرا معروفی - امیرحسین مولازاده - مهرداد اردبیلیپور
Low-Power Subthreshold Level Shifter in 180 nm Process
Zahra Ghasemzadeh - Mehdi Saberi
Photonic Crystal-based Plasmonic Biosensor with Low-cost and High-sensitivity Properties
Mahdieh Ahmadi Motlagh - Mahdieh Bozorgi - Mahmood Rafaei-Booket
Proposing an indirect distributed approach to apply SSSEP vibrational stimulation
SAHAR SADEGHI - Ali Maleki
VGG16-based Feature Fusion For Image Kyepoint Description
Javid Norouzi - Alireza Liaghat - Mohammad Sadegh Helfroush - Habibollah Danyali
A Lightweight Authentication Protocol For M2M Communication In IIoT Using Physical Unclonable Functions
Elaheh Kharghani - Saeed Aliakbari - Javad Bidad - Amir masoud Aminian moddares
بیشتر
ثمین همایش، سامانه مدیریت کنفرانس ها و جشنواره ها - نگارش 42.0.4