Optofluidic thin-film sensors prepared by Oblique Angle Deposition

147 Pages·2016·7.94 MB·English

by  Oliva Ramírez, Manuel

Optofluidic thin-film sensors
prepared by Oblique Angle
Deposition

Manuel Oliva Ramírez
Instituto de Ciencia de Materiales de Sevilla (US-CSIC)
Universidad de Sevilla

PhD thesis, 2016

Optofluidic thin-film sensors prepared
by Oblique Angle Deposition

A dissertation submitted for the degree of
Philosophiæ Doctor (PhD)
Memoria presentada para optar al grado
de Doctor por la Universidad de Sevilla
Seville, January 2016

Manuel Oliva Ramírez

Directed by:
Pr. Agustín Rodríguez González- Dr. Francisco Yubero Valencia
Elipe Investigador Científico CSIC
Instituto de Ciencia de Materiales
Profesor de Investigación CSIC
de Sevilla
Instituto de Ciencia de Materiales
(CSIC-Universidad de Sevilla)
de Sevilla

(CSIC-Universidad de Sevilla)

Tutor:
Pr. Alfonso Caballero Martínez
Catedrático Universidad de Sevilla
Dpt. Química Inorgánica
(Universidad de Sevilla)

Index

Chapter 1
Introduction ..................................................................................................................................... 9
1.1 Preparation of Oblique Angle Deposition (OAD) thin films. .......................... 11
1.1.1. Geometry of the deposition process and shadowing effects. .............. 12
1.1.2 Microstructure and Sculptured thin films. ................................................... 14
1.2. Porosity and optical properties of OAD Thin Films. ........................................ 16
1.3. Optofluidics. ...................................................................................................................... 18
1.3.1. Optofluidic Refractive Index (RI) sensors. .................................................. 19
1.3.2. Optofluidic planar RI structures prepared by OAD of thin films........ 21
1.4. Objectives .......................................................................................................................... 23
1.5. Scheme of the thesis. ..................................................................................................... 24
1.6. References ......................................................................................................................... 25
Chapter 2
Liquids Analysis with Optofluidic Bragg Microcavities ............................................... 33
2. 1. Introduction..................................................................................................................... 35
2. 2. Experimental and Methods ....................................................................................... 37
2. 3. Results and Discussion ................................................................................................ 38
2. 3. 1. Microstructure and optical properties of Bragg microcavities
prepared by GLAD ............................................................................................................. 38
2. 3. 2. Optofluidic response of microcavities......................................................... 41
2. 3. 3. Optofluidic analysis of liquid solutions by means of GLAD
microcavities ........................................................................................................................ 45
2. 4. Conclusions ...................................................................................................................... 50
2. 5. References ........................................................................................................................ 51
Chapter 3
Optofluidic Modulation of Self-associated Nanostructural Units Forming Planar
Bragg Microcavities .................................................................................................................... 55
3.1. Introduction ...................................................................................................................... 56
3.2. Experimental and Methods ........................................................................................ 57
3.2.1. Fabrication of BMs and optofluidic devices. ............................................... 57
3.2.2. Characterization of BMs ...................................................................................... 57
3.2.3. Simulation of the optical response and polarization dependence .... 58
3. 3. Results and Discussion ................................................................................................ 59
3.3.1. Morphology and bundling association .......................................................... 59
3.3.2. Polarization activity of planar BMs ................................................................ 63
3.3.3. BM thin films as wave retarders ...................................................................... 65
3.3.4. Optofluidic behaviour of polarization active BMs .................................... 70
3.3.5. Polarization activity and fence-bundling association ............................. 73
3.4. Conclusions ....................................................................................................................... 73
3.5. References ......................................................................................................................... 74
Chapter 4
Optofluidic analysis with polarization active Bragg Microcavities prepared by
Oblique Angle Deposition......................................................................................................... 77
4.1. Introduction ...................................................................................................................... 79
4.2. Experimental and Methods ........................................................................................ 81
4.3. Results and Discussion ................................................................................................. 83
4.3.1. Optofluidic behavior of nanostructured Bragg Microcavities ............. 83
4.3.2. Liquid analysis by monitoring changes in the optical spectra of BMs.
................................................................................................................................................... 84
4.3.3. Liquid analysis by monitoring changes in the optical activity of BM.
................................................................................................................................................... 89
4.4. Conclusions ....................................................................................................................... 90
4.5. References ......................................................................................................................... 91
Chapter 5
Anomalous Giant Absorption of Dye solutions infiltrated in Planar Bragg
Microcavities ................................................................................................................................. 95
5.1. Introduction ...................................................................................................................... 97
5.2. Experimental and Methods ........................................................................................ 97
5.2.1. Materials and characterization and analysis procedures. .................... 97
5.2.2. Simulation analysis ............................................................................................... 99
5.3. Results .............................................................................................................................. 100
5.3.1. Liquid infiltration of Bragg microcavities with two or more resonant
peaks. ................................................................................................................................... 100
5.4. Discussion and Conclusions .................................................................................... 111
5.5 References. ...................................................................................................................... 115
Chapter 6
General conclusions ................................................................................................................. 119
Chapter 7
Resumen en español. ............................................................................................................... 123
7.1. Análisis de líquidos con Microcavidades de Bragg Optofluídicas. .......... 125
7.2. Modulación Optofluídica de unidades nanoestructurales autoasociadas
formando microcavidades de Bragg planas. ............................................................. 131
7.3. Análisis Optofluídico con Microcavidades de Bragg ópticamente activas
preparadas por Deposición a Ángulo Oblicuo. ........................................................ 136
7.4. Absorción colosal anómala de colorantes infiltrados en Microcavidades
de Bragg Planas. ................................................................................................................... 140
7.5. Referencias. .................................................................................................................... 146

Chapter 1
Introduction