Terahertz Electromagnetic Wave Detection: Difference between revisions
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===LN-based THz pulse generation=== | ===LN-based THz pulse generation=== | ||
We assume that a electromagnetic wave goes in the direction with an angle \epsilon between z axis. | |||
<math>E(t)=\int E(\omega) e^{i\omega t-ikz\cdot\cos\epsilon-ikx\cdot\sin\epsilon} d\omega=\int E(\omega) e^{i\omega t-i\varphi} d\omega</math> | <math>E(t)=\int E(\omega) e^{i\omega t-ikz\cdot\cos\epsilon-ikx\cdot\sin\epsilon} d\omega=\int E(\omega) e^{i\omega t-i\varphi} d\omega</math> | ||
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<math>\varphi\approx\varphi(\omega_0)+\frac{\partial\varphi}{\partial\omega}(\omega-\omega_0)</math> | <math>\varphi\approx\varphi(\omega_0)+\frac{\partial\varphi}{\partial\omega}(\omega-\omega_0)</math> | ||
===Electro-Optical Sampling=== | |||
<math></math> | |||
==Setup== | ==Setup== | ||
==Measurement== | ==Measurement== | ||
Revision as of 14:47, 13 February 2025
Members
Shizhuo Luo E1353445@u.nus.edu
Project Overview
Terahertz (THz) waves are rather useful in communication (6G communication: 0.3~3 THz), astronomy (millimetre telescope: 0.22 THz) and solid state material characterisation. However, the generation and detection of THz wave so difficult that it is named as the "THz Gap".
In this project, we aim to generate and detect a THz pulse with a traditional method (Electro-Optical Sampling) and then calibrate a commercial VO2 thermal detector which is reported to be able to detect THz wave. (Specifically, we will use LiNbO3 (LN) crystal, which is generally applied in intense THz pulse generation, to generate a common THz pulse.)
This project can provide a cheaper option compared to specific THz camera (like THz fluorescence camera), and enable us to observe the pattern of THz wave in a more cost-effective way.
Theory Basis
LN-based THz pulse generation
We assume that a electromagnetic wave goes in the direction with an angle \epsilon between z axis.
Electro-Optical Sampling
