Details
| Originalsprache | Englisch |
|---|---|
| Qualifikation | Doktor-Ingenieur(in) (Dr.-Ing.) |
| Gradverleihende Hochschule | |
| Betreut von |
|
| Datum der Verleihung des Grades | 27 Nov. 2017 |
| Erscheinungsort | Hannover |
| Publikationsstatus | Veröffentlicht - 2017 |
Abstract
scale sensors. The optical properties are investigated by two different techniques; (i) through surface plasmon polaritons (SPPs) on metallic films and (ii) excitation of semiconductor nanoparticles (NPs). The SPPs, oscillating on the metallic films have an ability to propagate along the surface until they are absorbed by the metals. However, due to insufficiency in SPPs length, the
performances of the plasmonic devices are limited and practically challenging for recent technologies. The study of SPPs and their propagation length (LSPP) on polycrystalline metals (gold and silver) films is performed with respect to evaporation and sputtering deposition approaches on the glass substrates.
To enhance the scope further into the waveguide, and considering the convenience of using alternative pumping sources and system , this thesis investigates possibility of semiconductor NPs as sensor materials. The continuous films of different quantised semiconductor NPs, such
as quantum dots (QDs), quantum rods (QRs) and quantum wells (NPLs) are produced, and a fluorescence and emission spectra are measured. The optical properties are evaluated based on the sizes and morphology of the NPs as well as the laser system adopted. Afterwards, the temperature influence on the optical properties of the best performing NPs is investigated. Furthermore, a method to embed NPs into polymer to make these NPs stable and practical
for additive manufacturing is generated. In conclusion, metallic films and semiconductor NPs are investigated as sensor materials in the prospective media of small and large-scale sensors.
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Hannover, 2017. 143 S.
Publikation: Qualifikations-/Studienabschlussarbeit › Dissertation
}
TY - BOOK
T1 - Optical properties of surface plasmon polaritons and semiconductor based quantum system
AU - Chhantyal, Parva
PY - 2017
Y1 - 2017
N2 - Sensor materials are the fascinating investigative subjects in response to the demand of affordable and environmentally favourable sensors. The analysis on these materials also confronts crucial challenge raised in miniaturising sensors with yet efficient outcome. This thesis focuses on investigating optical properties of the materials with a conclusion to understand their abilities as sensors in remote future. Upon accomplishing this concept, their applications can be broadened, that is adaptable into the wide range of small and largescale sensors. The optical properties are investigated by two different techniques; (i) through surface plasmon polaritons (SPPs) on metallic films and (ii) excitation of semiconductor nanoparticles (NPs). The SPPs, oscillating on the metallic films have an ability to propagate along the surface until they are absorbed by the metals. However, due to insufficiency in SPPs length, theperformances of the plasmonic devices are limited and practically challenging for recent technologies. The study of SPPs and their propagation length (LSPP) on polycrystalline metals (gold and silver) films is performed with respect to evaporation and sputtering deposition approaches on the glass substrates.To enhance the scope further into the waveguide, and considering the convenience of using alternative pumping sources and system , this thesis investigates possibility of semiconductor NPs as sensor materials. The continuous films of different quantised semiconductor NPs, suchas quantum dots (QDs), quantum rods (QRs) and quantum wells (NPLs) are produced, and a fluorescence and emission spectra are measured. The optical properties are evaluated based on the sizes and morphology of the NPs as well as the laser system adopted. Afterwards, the temperature influence on the optical properties of the best performing NPs is investigated. Furthermore, a method to embed NPs into polymer to make these NPs stable and practicalfor additive manufacturing is generated. In conclusion, metallic films and semiconductor NPs are investigated as sensor materials in the prospective media of small and large-scale sensors.
AB - Sensor materials are the fascinating investigative subjects in response to the demand of affordable and environmentally favourable sensors. The analysis on these materials also confronts crucial challenge raised in miniaturising sensors with yet efficient outcome. This thesis focuses on investigating optical properties of the materials with a conclusion to understand their abilities as sensors in remote future. Upon accomplishing this concept, their applications can be broadened, that is adaptable into the wide range of small and largescale sensors. The optical properties are investigated by two different techniques; (i) through surface plasmon polaritons (SPPs) on metallic films and (ii) excitation of semiconductor nanoparticles (NPs). The SPPs, oscillating on the metallic films have an ability to propagate along the surface until they are absorbed by the metals. However, due to insufficiency in SPPs length, theperformances of the plasmonic devices are limited and practically challenging for recent technologies. The study of SPPs and their propagation length (LSPP) on polycrystalline metals (gold and silver) films is performed with respect to evaporation and sputtering deposition approaches on the glass substrates.To enhance the scope further into the waveguide, and considering the convenience of using alternative pumping sources and system , this thesis investigates possibility of semiconductor NPs as sensor materials. The continuous films of different quantised semiconductor NPs, suchas quantum dots (QDs), quantum rods (QRs) and quantum wells (NPLs) are produced, and a fluorescence and emission spectra are measured. The optical properties are evaluated based on the sizes and morphology of the NPs as well as the laser system adopted. Afterwards, the temperature influence on the optical properties of the best performing NPs is investigated. Furthermore, a method to embed NPs into polymer to make these NPs stable and practicalfor additive manufacturing is generated. In conclusion, metallic films and semiconductor NPs are investigated as sensor materials in the prospective media of small and large-scale sensors.
U2 - 10.15488/8955
DO - 10.15488/8955
M3 - Doctoral thesis
CY - Hannover
ER -