A low-loss composition region identified from a thin-film composition spread of (Ba1−x−ySrxCay)TiO3

1999 ◽  
Vol 74 (8) ◽  
pp. 1165-1167 ◽  
Author(s):  
H. Chang ◽  
I. Takeuchi ◽  
X.-D. Xiang
Keyword(s):  
Thin Film ◽  
Low Loss ◽  
Composition Region ◽  
Film Composition

scholarly journals Fabrication, micro-structure characteristics and transport properties of co-evaporated thin films of Bi2Te3 on AlN coated stainless steel foils

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Aziz Ahmed ◽  
Seungwoo Han
Keyword(s):  
Thin Film ◽  
Crystal Structure ◽  
Thin Films ◽  
Stainless Steel ◽  
Substrate Temperature ◽  
Transport Properties ◽  
Structural Defects ◽  
Film Composition ◽  
High Substrate ◽  
Foil Substrate

AbstractN-type bismuth telluride (Bi2Te3) thin films were prepared on an aluminum nitride (AlN)-coated stainless steel foil substrate to obtain optimal thermoelectric performance. The thermal co-evaporation method was adopted so that we could vary the thin film composition, enabling us to investigate the relationship between the film composition, microstructure, crystal preferred orientation and thermoelectric properties. The influence of the substrate temperature was also investigated by synthesizing two sets of thin film samples; in one set the substrate was kept at room temperature (RT) while in the other set the substrate was maintained at a high temperature, of 300 °C, during deposition. The samples deposited at RT were amorphous in the as-deposited state and therefore were annealed at 280 °C to promote crystallization and phase development. The electrical resistivity and Seebeck coefficient were measured and the results were interpreted. Both the transport properties and crystal structure were observed to be strongly affected by non-stoichiometry and the choice of substrate temperature. We observed columnar microstructures with hexagonal grains and a multi-oriented crystal structure for the thin films deposited at high substrate temperatures, whereas highly (00 l) textured thin films with columns consisting of in-plane layers were fabricated from the stoichiometric annealed thin film samples originally synthesized at RT. Special emphasis was placed on examining the nature of tellurium (Te) atom based structural defects and their influence on thin film properties. We report maximum power factor (PF) of 1.35 mW/m K2 for near-stoichiometric film deposited at high substrate temperature, which was the highest among all studied cases.

Ultrahigh Index and Low-loss Silicon Rich Nitride Thin film for NIR HAMR Optics

2017 ◽  
Vol 53 (5) ◽  
pp. 1-7 ◽  
Author(s):  
Kim Peng Lim ◽  
Vivek Krishnamurthy ◽  
Ji Feng Ying ◽  
Jing Pu ◽  
Qian Wang
Keyword(s):  
Thin Film ◽  
Low Loss

Low loss edge-coupling thin-film lithium niobatemodulator with efficient thermal-optic phase shifter

2021 ◽  
Author(s):  
pan ying ◽  
Heyun Tan ◽  
Junwei Zhang ◽  
mingbo he ◽  
Mengyue Xu ◽  
...  
Keyword(s):  
Thin Film ◽  
Phase Shifter ◽  
Low Loss ◽  
Thermal Optic

A Large Area and Low Loss Thin-Film Terahertz Polarizer

2015 ◽  
Vol 44 (9) ◽  
pp. 923004
Author(s):  
毛洪艳 MAO Hong-yan ◽  
许红梅 XU Hong-mei ◽  
夏良平 XIA Liang-ping ◽  
王思江 WANG Si-jiang ◽  
饶先花 RAO Xian-hua ◽  
...  
Keyword(s):  
Thin Film ◽  
Large Area ◽  
Low Loss

scholarly journals Ultra-low-loss integrated visible photonics using thin-film lithium niobate

Optica ◽  
2019 ◽  
Vol 6 (3) ◽  
pp. 380 ◽  
Author(s):  
Boris Desiatov ◽  
Amirhassan Shams-Ansari ◽  
Mian Zhang ◽  
Cheng Wang ◽  
Marko Lončar
Keyword(s):  
Thin Film ◽  
Lithium Niobate ◽  
Low Loss
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