Mode-locking of self-generated oscillations in a semiconductor model for low-temperature impurity breakdown

1990 ◽  
Vol 78 (2) ◽  
pp. 305-315 ◽  
Author(s):  
H. Naber ◽  
E. Sch�ll
Keyword(s):  
Low Temperature ◽  
Mode Locking

Low-temperature-GaAs device used simultaneously as a mode-locking device and as a photoconductive switch

2002 ◽  
Vol 41 (12) ◽  
pp. 2228
Author(s):  
Martin Leitner ◽  
Peter Glas ◽  
Peter Semionyk ◽  
Marc Wrage ◽  
Jens Herfort ◽  
...  
Keyword(s):  
Low Temperature ◽  
Mode Locking ◽  
Photoconductive Switch ◽  
Low Temperature Gaas

Passively mode-locking Nd:Gd_05Y_05VO_4 laser with an In_025Ga_075As absorber grown at low temperature

2005 ◽  
Vol 44 (20) ◽  
pp. 4384 ◽  
Author(s):  
Yong-Gang Wang ◽  
Xiao-Yu Ma ◽  
Ya-Xian Fan ◽  
Hui-Tian Wang
Keyword(s):  
Low Temperature ◽  
Mode Locking

Self-starting mode locking of a Nd:glass fiber laser by use of the third-order nonlinearity of low-temperature-grown GaAs

1999 ◽  
Vol 24 (22) ◽  
pp. 1567 ◽  
Author(s):  
M. Leitner ◽  
P. Glas ◽  
T. Sandrock ◽  
M. Wrage ◽  
G. Apostolopoulos ◽  
...  
Keyword(s):  
Low Temperature ◽  
Fiber Laser ◽  
Mode Locking ◽  
Third Order ◽  
The Third ◽  
Third Order Nonlinearity ◽  
Low Temperature Grown Gaas

scholarly journals Quasiperiodicity and Mode Locking of Undriven Spontaneous Oscillations in Germanium Crystals

1987 ◽  
Vol 42 (8) ◽  
pp. 841-845
Author(s):  
J. Peinke ◽  
J. Parisi ◽  
B. Röhricht ◽  
B. Wessely ◽  
K. M. Mayer
Keyword(s):  
Low Temperature ◽  
Mode Locking ◽  
Dissipative Structures ◽  
Avalanche Breakdown ◽  
Current Transport ◽  
Simultaneous Presence ◽  
Spontaneous Formation ◽  
Transport Behavior ◽  
Semiconductor System ◽  
Low Dimensional

Nonlinear current transport behavior during low-temperature avalanche breakdown of germanium comprises the spontaneous formation of spatial and temporal dissipative structures in the formerly homogeneous semiconductor. Due to the simultaneous presence of two and more competing fundamental oscillatory modes intrinsic to our synergetic semiconductor system, selforganized emergence of quasiperiodic and mode-locked states can be observed followed by the quasiperiodic approach to low-dimensional chaos.

In SituControlled Growth of Low-Temperature GaAs and Its Application for Mode-Locking Devices

2000 ◽  
Vol 39 (Part 1, No. 4B) ◽  
pp. 2452-2456 ◽  
Author(s):  
J. Herfort ◽  
G. Apostolopoulos ◽  
K.-J. Friedland ◽  
H. Kostial ◽  
W. Ulrici ◽  
...  
Keyword(s):  
Low Temperature ◽  
Mode Locking ◽  
Low Temperature Gaas

Self-Starting Passively Mode-Locking All-Solid-State Laser with GaAs Absorber Grown at Low Temperature

2005 ◽  
Vol 22 (10) ◽  
pp. 2575-2577 ◽  
Author(s):  
Jia Yu-Lei ◽  
Ling Wei-Jun ◽  
Wei Zhi-Yi ◽  
Wang Yong-Gang ◽  
Ma Xiao-Yu
Keyword(s):  
Solid State ◽  
Low Temperature ◽  
Mode Locking ◽  
Solid State Laser ◽  
State Laser

VORTEX STATES AND PEAK EFFECT AT LOW TEMPERATURE IN THICK AMORPHOUS FILMS WITH WEAK PINNING

2007 ◽  
Vol 21 (18n19) ◽  
pp. 3387-3393 ◽  
Author(s):  
S. OKUMA ◽  
K. KASHIRO ◽  
N. KOKUBO
Keyword(s):  
Low Temperature ◽  
Vortex Lattice ◽  
Solid Phase ◽  
Mode Locking ◽  
Peak Effect ◽  
Field Region ◽  
Superconducting Transition ◽  
Static Properties ◽  
Amorphous Films ◽  
Weak Pinning

We report on the dynamic as well as static properties of vortices in the low-temperature (T) solid phase of a thick amorphous Mo x Ge 1-x film with weak pinning. The vortex-solid state is considered to be a weakly disordered vortex lattice, which is inferred from the mode-locking resonance over the broad field region. The peak effect of the critical current Ic with magnetic field is clearly visible down to the lowest T measured (0.2 K), which corresponds to 3.3% of the superconducting transition temperature. We find that largest voltage noise originating from current-driven vortices appears in the field region just prior to the peak field at which Ic takes a peak. This is in accord with the result reported in NbSe 2 single crystals.

Exsolution and inversion in pigeonite from the Whin Sill, Northern England

1978 ◽  
Vol 36 (1) ◽  
pp. 474-475
Author(s):  
P.P.K. Smith
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Homogeneous Nucleation ◽  
Silicate Mineral ◽  
Antiphase Boundaries ◽  
Two Phase ◽  
Primitive Form ◽  
The Core ◽  
Nucleation Mechanisms ◽  
And Inversion

Grains of pigeonite, a calcium-poor silicate mineral of the pyroxene group, from the Whin Sill dolerite have been ion-thinned and examined by TEM. The pigeonite is strongly zoned chemically from the composition Wo8En64FS28 in the core to Wo13En34FS53 at the rim. Two phase transformations have occurred during the cooling of this pigeonite:- exsolution of augite, a more calcic pyroxene, and inversion of the pigeonite from the high- temperature C face-centred form to the low-temperature primitive form, with the formation of antiphase boundaries (APB's). Different sequences of these exsolution and inversion reactions, together with different nucleation mechanisms of the augite, have created three distinct microstructures depending on the position in the grain.In the core of the grains small platelets of augite about 0.02μm thick have farmed parallel to the (001) plane (Fig. 1). These are thought to have exsolved by homogeneous nucleation. Subsequently the inversion of the pigeonite has led to the creation of APB's.

Low temperature x-ray microanalysis of frozen-hydrated tobacco leaves

1984 ◽  
Vol 42 ◽  
pp. 284-285
Author(s):  
S. Edith Taylor ◽  
Patrick Echlin ◽  
May McKoon ◽  
Thomas L. Hayes
Keyword(s):  
Low Temperature ◽  
Lemna Minor ◽  
Root Tips ◽  
Tobacco Leaves ◽  
X Ray ◽  
Whole Cells ◽  
Carbon Coated ◽  
The Right ◽  
Beam Currents ◽  
The University

Low temperature x-ray microanalysis (LTXM) of solid biological materials has been documented for Lemna minor L. root tips. This discussion will be limited to a demonstration of LTXM for measuring relative elemental distributions of P,S,Cl and K species within whole cells of tobacco leaves.Mature Wisconsin-38 tobacco was grown in the greenhouse at the University of California, Berkeley and picked daily from the mid-stalk position (leaf #9). The tissue was excised from the right of the mid rib and rapidly frozen in liquid nitrogen slush. It was then placed into an Amray biochamber and maintained at 103K. Fracture faces of the tissue were prepared and carbon-coated in the biochamber. The prepared sample was transferred from the biochamber to the Amray 1000A SEM equipped with a cold stage to maintain low temperatures at 103K. Analyses were performed using a tungsten source with accelerating voltages of 17.5 to 20 KV and beam currents from 1-2nA.

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