Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Afzaal Qamar"'
Autor:
Tuan‐Anh Pham, Afzaal Qamar, Toan Dinh, Mostafa Kamal Masud, Mina Rais‐Zadeh, Debbie G. Senesky, Yusuke Yamauchi, Nam‐Trung Nguyen, Hoang‐Phuong Phan
Publikováno v:
Advanced Science, Vol 7, Iss 21, Pp n/a-n/a (2020)
Abstract Semiconductor nanowires are widely considered as the building blocks that revolutionized many areas of nanosciences and nanotechnologies. The unique features in nanowires, including high electron transport, excellent mechanical robustness, l
Externí odkaz:
https://doaj.org/article/f97f9068710145d8992bf08431cdeb31
Autor:
Pablo Guzman, Toan Dinh, Hoang-Phuong Phan, Abbin Perunnilathil Joy, Afzaal Qamar, Behraad Bahreyni, Yong Zhu, Mina Rais-Zadeh, Huaizhong Li, Nam-Trung Nguyen, Dzung Viet Dao
Publikováno v:
Materials & Design, Vol 194, Iss , Pp 108922- (2020)
Tuning the natural frequency of a resonator is an innovative approach for the implementation of mechanical resonators in a broad range of fields such as timing applications, filters or sensors. The conventional electrothermal technique is not favorab
Externí odkaz:
https://doaj.org/article/5ee5c29b63e84b5ca2c2876e8ed2946c
Publikováno v:
Journal of Microelectromechanical Systems. 29:900-905
In this paper, we present ultra-high quality factor ( ${Q}$ ) SAW resonators fabricated on aluminum gallium nitride on gallium nitride on silicon (AlGaN/GaN/Si) heterostructures with ${Q}$ exceeding 6000 at room temperature. We characterize their tem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c332bff3a06cd2f56bfd51bb69fe9f56
https://doi.org/10.1109/jmems.2020.2999040
https://doi.org/10.1109/jmems.2020.2999040
Autor:
S M Enamul Hoque Yousuf, Yuncong Liu, Xu-Qian Zheng, Afzaal Qamar, Mina Rais-Zadeh, Philip X.-L. Feng
Publikováno v:
2022 IEEE 35th International Conference on Micro Electro Mechanical Systems Conference (MEMS).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3617f4b93928316a5fc8002e8a7fb74
https://doi.org/10.1109/mems51670.2022.9699607
https://doi.org/10.1109/mems51670.2022.9699607
Autor:
Philip X.-L. Feng, Xu-Qian Zheng, Afzaal Qamar, Jaesung Lee, Stewart Sherrit, Mina Rais-Zadeh
Publikováno v:
Journal of Microelectromechanical Systems. 28:619-627
This paper reports on the investigation of anomalous low quality factors ( ${Q}\text{s}$ ) in AlN thin film-based length extensional (LE)-mode resonators using finite element method (FEM), analytical modeling, and experimental techniques. Different h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f1cf71f26f2b089bc6ef1e7bffec0fa
https://doi.org/10.1109/jmems.2019.2913875
https://doi.org/10.1109/jmems.2019.2913875
Autor:
Mina Rais-Zadeh, Nam-Trung Nguyen, Toan Dinh, Alan Iacopi, Afzaal Qamar, Hoang-Phuong Phan, Dzung Viet Dao, Tuan-Khoa Nguyen, Junwei Lu
Publikováno v:
IEEE Electron Device Letters. 40:609-612
Silicon carbide (SiC) has been extensively investigated in the last decade, specifically for applications in harsh environments. However, most SiC sensors require an external power supply, which cannot operate at high temperatures. This letter develo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b54ffb53672434022e6b3fe5ce00b7c
https://doi.org/10.1109/led.2019.2899068
https://doi.org/10.1109/led.2019.2899068
Autor:
Mina Rais-Zadeh, Afzaal Qamar
Publikováno v:
IEEE Electron Device Letters. 40:321-324
We demonstrate coupled bulk and surface acoustic wave (BAW/SAW) resonators with significantly improved coupling efficiency as compared to SAW only devices. Two sets of stacks are investigated: one uses a thin film piezoelectric material with a bottom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f203a6c0f9589581669576228d17640
https://doi.org/10.1109/led.2018.2890755
https://doi.org/10.1109/led.2018.2890755
Autor:
Pablo Guzman, Toan Dinh, Afzaal Qamar, Jaesung Lee, X.Q. Zheng, Philip Feng, Mina Rais-Zadeh, Hoang-Phuong Phan, Thanh Nguyen, Abu Riduan Md Foisal, Huaizhong Li, Nam-Trung Nguyen, Dzung Viet Dao
Publikováno v:
Sensors and Actuators A: Physical. 343:113678
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f417ffec6d6d476c72672ccfebbedbaf
https://doi.org/10.1016/j.sna.2022.113678
https://doi.org/10.1016/j.sna.2022.113678
Publikováno v:
Advanced Functional Materials. 32:2202204
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d40e8d7ed8efa6b4932094c116bab36d
https://doi.org/10.1002/adfm.202202204
https://doi.org/10.1002/adfm.202202204
Publikováno v:
2020 IEEE 33rd International Conference on Micro Electro Mechanical Systems (MEMS).
This paper reports, for the first time, on the engineering of silicon-doped gallium nitride (GaN) based surface acoustic wave (SAW) devices for ultra-stable clocks with frequency stability of better than 20 ppb/°C over the temperature range of −19
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67180649997b20e7cc27dce34deda8e7
https://doi.org/10.1109/mems46641.2020.9056169
https://doi.org/10.1109/mems46641.2020.9056169