We have demonstrated an efficient and compact passively Q-switched and mode-locked (QML) 1064 nm Nd:YVO4 laser by using a low temperature grown GaAs (LT-GaAs) saturable absorber as well as an output coupler. Stable QML with envelope duration as short as 10 ns and Q-switched repetition rate of 36 kHz was [...]
PAM-XIAMEN offers 2inch or 4inch red infrared AlGaAs / GaAs LED epi wafer with wavelength 850-880 nm and 890-910nm:
1. Red Infrared AlGaAs / GaAs LED Epi Wafer
PAM-190723-LED
Structure
Thickness, um
Type
Composition
CC, cm-3
Wide-gap window
1
р
AlхGa1-хAs (х=0,25-0,3)
(2-5) ∙1018
Barrier layer
0.06
р
AlхGa1-хAs (х=0,25-0,3)
(0.8-1) ∙1018
Active layer
–
GaAs
undoped
–
Al0,2Ga0,8As
Barrier layer
0.06
n
AlхGa1-хAs (х=0,25-0,3)
(0.5-1) ∙1017
Wide-gap window
6
n
AlхGa1-хAs
(1-2)∙1018
(х=0,3-0,35)
Stop layer
0.1
–
AlхGa1-хAs
–
(х=0,9-1)
Buffer layer
–
n
GaAs
–
Substrate
–
n+
GaAs
–
2. Where is the [...]
2020-05-18meta-author
PAM XIAMEN offers Mica disk.
Pure Mica Sheet
Highest Grade Mica Disks, 9.9mm diameter 10/pkg
Highest Grade Mica Disks, 20mm diameter 10/pkg
Highest Grade Mica Sheets, 15mm x 15mm (0.59” x 0.59″”), 0.15 to 0.177mm (0.006-0.007″”) thick, 10/pkg”
Hi-Grade Mica Sheets, 15mm x 15mm [...]
2019-05-13meta-author
PAM XIAMEN offers 2″ Silicon Wafer.
Material
Orient.
Diam.
Thck
(μm)
Surf.
Resistivity
Ωcm
Comment
p-type Si:B
[110] ±0.5°
2″
279
P/E
FZ >1,000
p-type Si:B
[100]
2″
300
P/E
FZ 2,800-3,300
SEMI Prime, TTV<7μm
p-type Si:B
[100]
2″
300
P/E
FZ 2,800-3,300
SEMI Prime, TTV<7μm
p-type Si:B
[100]
2″
300
P/E
FZ 2,800-3,300
SEMI Prime, TTV<7μm
p-type Si:B
[111] ±0.5°
2″
500
P/P
FZ 5,000-6,500
SEMI Test (in unsealed cassette)
p-type Si:B
[111] ±0.5°
2″
275
P/E
FZ 3,000-5,000
SEMI Prime, Lifetime>2,000μs, in hard cassettes of 5 wafers
p-type Si:B
[111-7° towards[110]] ±0.5°
2″
279
P/P
FZ >2,000
SEMI Prime
p-type Si:B
[111] ±0.5°
2″
331
P/E
FZ 2,000-5,000
SEMI, Soft cst
p-type Si:B
[111] ±0.5°
2″
331
P/E
FZ 2,000-5,000
SEMI TEST (Scratched), Soft cst
p-type Si:B
[111] ±0.5°
2″
331
P/E
FZ 2,000-5,000
SEMI [...]
2019-03-07meta-author
When the In composition in the InGaAs material reaches 0.53, and Ga reaches 0.47, InGaAs / InP lattice matched makes it can form a heterojunction. The InGaAs / InP heterojunction structure utilizes the steps of the conduction band and valence band formed by the [...]
This study simulates thermal conductivity via a carrier scattering mechanism and the related parameters are obtained based on first principles for intrinsic and doped silicon carbide (SiC) over a temperature range of 300–1450 K. The theoretical analysis results show that the thermal conductivity decreases with [...]
2020-02-11meta-author