Induced transparency in ring resonator devices

A microring resonator consists of a ring side-coupled to a bus waveguide, where the light exchange is achieved by means of evanescent coupling mechanism. It is a strong candidate for integrated optics due to its advantage of compact size, cascadable input/output ports, and the compatibility of CMOS...

Full description

Saved in:
Bibliographic Details
Main Author: Zhang, Yanbing
Other Authors: Mei Ting
Format: Theses and Dissertations
Language:English
Published: 2012
Subjects:
Online Access:https://hdl.handle.net/10356/48068
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-48068
record_format dspace
spelling sg-ntu-dr.10356-480682023-07-04T16:12:46Z Induced transparency in ring resonator devices Zhang, Yanbing Mei Ting Zhang Dao Hua School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Electronic circuits A microring resonator consists of a ring side-coupled to a bus waveguide, where the light exchange is achieved by means of evanescent coupling mechanism. It is a strong candidate for integrated optics due to its advantage of compact size, cascadable input/output ports, and the compatibility of CMOS fabrication. The microring resonator can be used to create many interesting phenomena that are difficult to obtain in other classical configurations. This thesis focuses on the theoretical analysis and experimental realization of induced transparency in optical devices derived from ring resonators. In this thesis, I propose a ring-bus-ring Mach-Zehnder interferometer (RBRMZI) system based on a 3×3 coupler, and show that such a system can generate an electromagnetically induced transparency (EIT)-like spectrum via phase engineering facilitated by inter-pathways interference between RBR and MZI, instead of separate light interaction in two resonators alone. Both the transfer matrix formalism and the temporal coupled mode theory are investigated to model this induced transparency. The relationship between the two theories is obtained via the energy-conservation and Q-factors. In addition, the EIT-like spectrum in the RBRMZI is experimentally realized using silicon-on-insulator technology. The best RBRMZI device has a transparency with a bandwidth of 0.25nm, a free spectral range of 12nm and a Q-factor of ~6300. With further measurements of the devices having strong ring-bus coupling, we obtain a Q~18000 when the circumference of one ring is 43.4μm and the circumference of the other ring is slightly detuned by ~0.035%. Moreover, we achieve a roundtrip loss as small as ~0.5% of the input energy. The measurement results agree well with theoretical prediction and 2D-FDTD numerical calculations. MASTER OF ENGINEERING (EEE) 2012-03-01T01:50:58Z 2012-03-01T01:50:58Z 2012 2012 Thesis Zhang, Y. (2012). Induced transparency in ring resonator devices. Master’s thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/48068 10.32657/10356/48068 en 80 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering::Electronic circuits
spellingShingle DRNTU::Engineering::Electrical and electronic engineering::Electronic circuits
Zhang, Yanbing
Induced transparency in ring resonator devices
description A microring resonator consists of a ring side-coupled to a bus waveguide, where the light exchange is achieved by means of evanescent coupling mechanism. It is a strong candidate for integrated optics due to its advantage of compact size, cascadable input/output ports, and the compatibility of CMOS fabrication. The microring resonator can be used to create many interesting phenomena that are difficult to obtain in other classical configurations. This thesis focuses on the theoretical analysis and experimental realization of induced transparency in optical devices derived from ring resonators. In this thesis, I propose a ring-bus-ring Mach-Zehnder interferometer (RBRMZI) system based on a 3×3 coupler, and show that such a system can generate an electromagnetically induced transparency (EIT)-like spectrum via phase engineering facilitated by inter-pathways interference between RBR and MZI, instead of separate light interaction in two resonators alone. Both the transfer matrix formalism and the temporal coupled mode theory are investigated to model this induced transparency. The relationship between the two theories is obtained via the energy-conservation and Q-factors. In addition, the EIT-like spectrum in the RBRMZI is experimentally realized using silicon-on-insulator technology. The best RBRMZI device has a transparency with a bandwidth of 0.25nm, a free spectral range of 12nm and a Q-factor of ~6300. With further measurements of the devices having strong ring-bus coupling, we obtain a Q~18000 when the circumference of one ring is 43.4μm and the circumference of the other ring is slightly detuned by ~0.035%. Moreover, we achieve a roundtrip loss as small as ~0.5% of the input energy. The measurement results agree well with theoretical prediction and 2D-FDTD numerical calculations.
author2 Mei Ting
author_facet Mei Ting
Zhang, Yanbing
format Theses and Dissertations
author Zhang, Yanbing
author_sort Zhang, Yanbing
title Induced transparency in ring resonator devices
title_short Induced transparency in ring resonator devices
title_full Induced transparency in ring resonator devices
title_fullStr Induced transparency in ring resonator devices
title_full_unstemmed Induced transparency in ring resonator devices
title_sort induced transparency in ring resonator devices
publishDate 2012
url https://hdl.handle.net/10356/48068
_version_ 1772826284561268736