Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Philip Dowd"'
Autor:
Mikhail Naydenkov, Radek Roucka, Sabeur Siala, Philip Dowd, Aymeric Maros, Ding Ding, Ferran Suarez, Ligang Gao
Publikováno v:
Optical Components and Materials XVII.
Emerging applications in sensing, LIDAR, spectroscopy, and SWIR imaging require photodetectors operating at wavelengths beyond the range of silicon technology and that can be produced cost-effectively for very high-volume consumer and commercial mark
Autor:
Mingguo Liu, Sanjay Krishna, Darren Forman, Philip Dowd, Daniel N. Carothers, P.M. Varangis, Joe C. Campbell, J. Zilko, Senthil Annamalai, Tom Tumolillo, K. Sun, A.L. Gray
Publikováno v:
physica status solidi c. 3:439-443
Novel InAs/InGaAs quantum dots-in-a-well (DWELL) infrared photodetectors are described. These detectors, in which the active region consists of InAs quantum dots embedded in an InGaAs quantum well, represent a hybrid between a conventional quantum we
Autor:
Guangya Zhou, Philip Dowd
Publikováno v:
Journal of Micromechanics and Microengineering. 13:178-183
We investigate the electromechanical side instability and the stable travel range of comb-drive actuators. The stable travel range depends on the finger gap spacing, the initial finger overlap, and the spring stiffness ratio of the compliant suspensi
Publikováno v:
Journal of Crystal Growth. 244:136-141
Post-growth rapid thermal annealing has been performed with In(Ga)As quantum dots (QDs) at different strain statuses. It is confirmed that the strain-enhanced interdiffusion decreases the inhomogeneous size distribution. The preferential lateral inte
Autor:
Guangya Zhou, Philip Dowd
Publikováno v:
Sensors and Actuators A: Physical. :386-397
In this paper, a modeling approach is introduced that includes micromechanical components into the system level simulation. In our approach, a complicated microsystem is first decomposed into a set of much simpler components. Each component is treate
Autor:
Sanjay Krishna, P.M. Varangis, Mingguo Liu, Tom Tumolillo, Darren Forman, Senthil Annamalai, Philip Dowd, Daniel N. Carothers, K. Sun, Joe C. Campbell, A.L. Gray
Publikováno v:
SPIE Proceedings.
We report the first two-color 320 x 256 infrared Focal Plane Array (FPA), based on a voltage-tunable InAs/InGaAs/GaAs DWELL structure. The detectors, grown by solid source molecular beam epitaxy (MBE) comprise of a 15-stack asymmetric DWELL structure
Autor:
Unal Sakoglu, Zhipeng Wang, Philip Dowd, J. Scott Tyo, Majeed M. Hayat, Sanjay Krishna, Senthil Annamalai
Publikováno v:
Nanosensing: Materials and Devices.
Quantum-dot infrared photodetectors (QDIPs), based on intersubband transitions in nanoscale self-assembleddots, are perceived as a promising technology for mid-infrared-regime sensing since they are based on a matureGaAs technology, are sensitive to
Real-time implementation of matched filtering algorithms using adaptive focal-plane array technology
Autor:
Sanjay Krishna, Philip Dowd, Majeed M. Hayat, Unal Sakoglu, Senthil Annamalai, Zhipeng Wang, Nina-Rae Weisse-Bernstein, J. Scott Tyo
Publikováno v:
SPIE Proceedings.
Spectrally tunable quantum-dot infrared photodetectors (QDIPs) can be used to approximate multiple spectral responses with the same focal-plane array. Hence, they exhibit the potential for real time adaptive detection/classification. In the present s
Publikováno v:
SPIE Proceedings.
The realization of single-mode Distributed Feedback (DFB) and Distributed Bragg Reflector (DBR) lasers, based on surface grating structures is of considerable interest. Such devices offer a relatively simple grating fabrication process without compli
Publikováno v:
SPIE Proceedings.
The electromechanical side-instability and the stable travel range of comb-drive actuators are investigated. The stable travel range depends on the finger gap spacing, the initial finger overlap, and the spring stiffness ratio of the compliant suspen