Zobrazeno 1 - 10
of 34
pro vyhledávání: '"77"'
Publikováno v:
Optical Components and Materials XVIII.
In the pursuit of new mid-IR laser gain materials, dysprosium-doped barium fluoride was evaluated for its potential laser emission in the 3-μm spectral region. Comprehensive spectroscopic characterization was performed, including absorption, fluores
Publikováno v:
SPIE Proceedings.
Time-resolved photoluminescence (TRPL) is used to study the minority carrier lifetime in type-II superlattice (T2SL) infrared detector materials to investigate the recombination mechanisms, trap states and transport properties that currently limit th
Autor:
Oray Orkun Cellek, Elizabeth H. Steenbergen, Blair C. Connelly, Michael Wraback, Grace D. Metcalfe, Said Elhamri, A. W. K. Liu, Dmitri Lubyshev, Hongen Shen, Yong-Hang Zhang, Joel M. Fastenau, Yueming Qiu
Publikováno v:
SPIE Proceedings.
Temperature-dependent minority carrier lifetimes of InAs/InAs1-xSbx type-II superlattices are presented. The longest lifetime at 11 K is 504 ± 40 ns and at 77 K is 412 ± 25 ns. Samples with long periods and small wave function overlaps have both no
Autor:
G. A. Newburgh, Mark Dubinskii
Publikováno v:
Laser Technology for Defense and Security VII.
We report what is believed to be the first laser operation based on Ho 3+ -doped YVO 4 . The Ho +3 : YVO 4 was resonantly diode-pumped at ~1.93 μm to produce up to 1.6 W of continuous wave (CW) output power at ~2.054 μm. The laser had a slope effic
Publikováno v:
SPIE Proceedings.
Using a picosecond excitation source and a time-resolved streak camera detection system, we have observed the time-resolved photoluminescence spectra of C60 from toluene solution at room temperature and from thin film at both room temperature and 77
Autor:
Shekhar Guha
Publikováno v:
Nonlinear Frequency Generation and Conversion: Materials and Devices XVIII.
ZnGeP2 is one of the most useful nonlinear optical crystals for generation of high power and high energy infrared radiation in the 2 to 8 m spectral range because of its high nonlinear coefficient along with high thermal conductivity. Growth techn
Publikováno v:
Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2015.
The paper presents frequency f and temperature T p dependences of conductivity σ, capacitance C p and phase shift angle θ for the nanocomposite metal-dielectric (FeCoZr) x (CaF2) (100-x) . Samples of nanocomposite were produced by ion-beam sputteri
Autor:
Majed Khodr
Publikováno v:
SPIE Proceedings.
A potential materials system that may play a key role in IR spectroscopy applications is PbSe/Pb0.934 Sr0.066Se quantum well structure. In this work, the characteristic temperature (T0) relationship with laser cavity length was studied for this mater
Publikováno v:
SPIE Proceedings.
The rate of decay of triplet excitons following a photoexcitation pulse has been determined for poly(2-vinylnaphthalene) in a variety of solvents at ambient temperature and at 77 K. A three dimensional model for exciton diffusion fits the data at amb
Autor:
Clifford M. Krowne
Publikováno v:
SPIE Proceedings.
Numerical simulation results for n+nn+ GaAs and InP diode structures in the 1-3 THz frequency range are presented. Cryogenic temperatures from 4 through about 77 K are examined to obtain the two-terminal admittance. Earlier work has suggested possibl