Applications of machine learning methods for photonics and non-Hermitian physics

The recent advances in machine learning and related techniques have arisen their application in different areas. In physics, especially in photonics, Machine learning learns from the dataset and provide an accurate description of mapping between different physical variables. Therefore, they are qui...

Full description

Saved in:
Bibliographic Details
Main Author: Zhu, Changyan
Other Authors: Chong Yidong
Format: Thesis-Doctor of Philosophy
Language:English
Published: Nanyang Technological University 2024
Subjects:
Online Access:https://hdl.handle.net/10356/173955
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-173955
record_format dspace
spelling sg-ntu-dr.10356-1739552024-04-09T03:58:58Z Applications of machine learning methods for photonics and non-Hermitian physics Zhu, Changyan Chong Yidong School of Physical and Mathematical Sciences Centre for Disruptive Photonic Technologies (CDPT) Yidong@ntu.edu.sg Physics Photonics Non-Hermitian Machine learning The recent advances in machine learning and related techniques have arisen their application in different areas. In physics, especially in photonics, Machine learning learns from the dataset and provide an accurate description of mapping between different physical variables. Therefore, they are quite powerful in physics research. This thesis explores various machine learning algorithms for photonics and non-Hermitian physics. Chapter 1 introduces the interplay between machine learning and physics. In particular, dense neural networks and convolutional neural networks are explained in detail. Chapter 2 compares the efficiency of dense neural network (DNN), U-Net, and VGG-net for multi-mode fiber (MMF) image reconstruction, with DNN emerging as the most suitable due to its ability to consider non-local features. Chapter 3 introduces an intelligent real-time and self-adaptive terahertz beamforming scheme based on neural networks, demonstrating accurate beam steering and high generalizability. Chapter 4 uses a neural network with regularization for the reconstruction of random spectrometer signals, outperforming traditional matrix inversion methods in terms of bandwidth and accuracy. A compact, tunable spectrometer is also developed. Chapter 5 extends the exploration to non-Hermitian physics, identifying topological variants and Non-Hermitian Skin Effects (NHSE) using unsupervised learning methods. The potential applications of NHSE in quantum amplifiers and the continuum of bound states in non-Hermitian lattices are also discussed. Chapter 6 summarizes the entire thesis and discusses potential directions for future research based on the current thesis. Doctor of Philosophy 2024-03-08T00:45:00Z 2024-03-08T00:45:00Z 2024 Thesis-Doctor of Philosophy Zhu, C. (2024). Applications of machine learning methods for photonics and non-Hermitian physics. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/173955 https://hdl.handle.net/10356/173955 10.32657/10356/173955 en MOE2016-T3- 1-006 RG187/18 This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Physics
Photonics
Non-Hermitian
Machine learning
spellingShingle Physics
Photonics
Non-Hermitian
Machine learning
Zhu, Changyan
Applications of machine learning methods for photonics and non-Hermitian physics
description The recent advances in machine learning and related techniques have arisen their application in different areas. In physics, especially in photonics, Machine learning learns from the dataset and provide an accurate description of mapping between different physical variables. Therefore, they are quite powerful in physics research. This thesis explores various machine learning algorithms for photonics and non-Hermitian physics. Chapter 1 introduces the interplay between machine learning and physics. In particular, dense neural networks and convolutional neural networks are explained in detail. Chapter 2 compares the efficiency of dense neural network (DNN), U-Net, and VGG-net for multi-mode fiber (MMF) image reconstruction, with DNN emerging as the most suitable due to its ability to consider non-local features. Chapter 3 introduces an intelligent real-time and self-adaptive terahertz beamforming scheme based on neural networks, demonstrating accurate beam steering and high generalizability. Chapter 4 uses a neural network with regularization for the reconstruction of random spectrometer signals, outperforming traditional matrix inversion methods in terms of bandwidth and accuracy. A compact, tunable spectrometer is also developed. Chapter 5 extends the exploration to non-Hermitian physics, identifying topological variants and Non-Hermitian Skin Effects (NHSE) using unsupervised learning methods. The potential applications of NHSE in quantum amplifiers and the continuum of bound states in non-Hermitian lattices are also discussed. Chapter 6 summarizes the entire thesis and discusses potential directions for future research based on the current thesis.
author2 Chong Yidong
author_facet Chong Yidong
Zhu, Changyan
format Thesis-Doctor of Philosophy
author Zhu, Changyan
author_sort Zhu, Changyan
title Applications of machine learning methods for photonics and non-Hermitian physics
title_short Applications of machine learning methods for photonics and non-Hermitian physics
title_full Applications of machine learning methods for photonics and non-Hermitian physics
title_fullStr Applications of machine learning methods for photonics and non-Hermitian physics
title_full_unstemmed Applications of machine learning methods for photonics and non-Hermitian physics
title_sort applications of machine learning methods for photonics and non-hermitian physics
publisher Nanyang Technological University
publishDate 2024
url https://hdl.handle.net/10356/173955
_version_ 1806059932931325952