Sökning: "etching"

Visar resultat 21 - 25 av 247 avhandlingar innehållade ordet etching.

1. 21. Design, Simulation and Characterization of Some Planar Lightwave Circuits

   Författare :Yaocheng Shi; Anand Srinivasan; Sailing He; Daniel Erni; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; planar lightwave circuit; waveguide; coupler; multimode interference; photonic crystal waveguide; de multiplexer; triplexer; polarization beam splitter; dry etching; carrier life time.; Photonics; Fotonik;

   Sammanfattning : Optical devices based on planar lightwave circuit (PLC) technology have the advantages of small size, high reliability, possibility for large scale production, and potential integration with electronics. These devices are widely employed in optical telecommunications, sensing, data storage, imaging, and signal processing. LÄS MER

3. 22. Electrical Characterization of Silicon Nanogaps

   Författare :Jonas Berg; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic molecules; Molecular electronics; Surface leakage currents; Low-frequency noise; Soft breakdown; TSRAM; Resonant tunneling diodes; Selective etching; Silicon nanogaps; Nanocontacts;

   Sammanfattning : We have designed and manufactured silicon nanogaps aimed at electrically interfacing molecules, utilizing the precision thickness control in an oxidation process. An insulating layer was formed on a silicon wafer, and then polysilicon was deposited on top. LÄS MER

4. 23. Band gap engineering in Cu2ZnGexSn1-xS4 thin film solar cells

   Författare :Nishant Saini; Charlotte Platzer-Bjorkman; Jes K Larsen; Edgardo Saucedo; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CZTS; CZGTS; bandgap grading; ZTO; KCN-etching; titanium nitride; solar cell; Teknisk fysik med inriktning mot elektronik; Engineering Science with specialization in Electronics;

   Sammanfattning : Photovoltaics based on kesterite Cu2ZnSnS4 (CZTS) has attracted interest as a sustainable alternative to other thin film technologies due to their tunable material properties and earth-abundance. However, the efficiency is limited to 12. LÄS MER

5. 24. Venturing Further into the Field of 2D Materials and their Laminated Parent Phases

   Författare :Pernilla Helmer; Johanna Rosén; Jonas Björk; Martin Dahlqvist; Hannu-Pekka Komsa; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Density Functional Theory; Bonding analysis; Themodynamical stability; Electronic band structure; Computational screening; Dynamical stability; Nanolaminate; MXene; 2D material; Boridene; Chemical exfoliation; Selective etching;

   Sammanfattning : The field of 2D materials is a relatively young and rapidly growing area within materials science, which is concerned with atomically thin states of matter. Because of their intrinsic 2D morphology, 2D materials have exceptionally high surface to weight or surface to volume ratio. LÄS MER

7. 25. Technology and properties of InP-based photonic crystal structures and devices

   Författare :Naeem Shahid; Srinivasan Anand; Rob W. vad der Heijden; KTH; []
   Nyckelord :Integrated optics materials; Photonic crystals; Planar waveguides; Dispersion; Band-gap; Mode-gap; mini-stopband; InP; Nanostructure fabrication; dry etching; mass transport; material reflow; reliability; SRA - ICT; SRA - Informations- och kommunikationsteknik;

   Sammanfattning : Photonic crystals (PhCs) are periodic dielectric structures that exhibit a photonic band gap; a range of wavelengths for which light propagation is forbidden. 2D PhCs exhibit most of the properties as their three dimension counterparts with a compatibility with standard semiconductor processing techniques such as epitaxial growth, electron beam lithography, Plasma deposition/etching and electromechanical lapping/polishing. LÄS MER