Mathematics
Erbium
100%
Upconversion
73%
Potassium
72%
Spectroscopy
61%
Pump
60%
Waveguide
54%
Energy Transfer
51%
Excited States
51%
Absorption
37%
Wavelength
26%
Epitaxy
20%
Luminescence
20%
Etching
18%
Thin Films
14%
Probe
14%
Modulation
14%
Substrate
13%
Cross section
11%
Liquid
11%
Decay
9%
Range of data
7%
Curve
7%
Engineering & Materials Science
Erbium
73%
Excited states
58%
Potassium
57%
Spectroscopy
52%
Waveguides
48%
Energy transfer
40%
Pumps
36%
Lutetium
23%
Liquid phase epitaxy
23%
Wavelength
20%
Luminescence
17%
Yttrium
17%
Gadolinium
16%
Doping (additives)
13%
Etching
12%
Crystalline materials
12%
Thin films
11%
Modulation
9%
Substrates
8%
Physics & Astronomy
tungstates
63%
potassium
46%
erbium
45%
pumps
33%
waveguides
31%
energy transfer
28%
spectroscopy
24%
excitation
17%
lutetium
15%
liquid phase epitaxy
13%
C band
13%
gadolinium
13%
yttrium
12%
wavelengths
11%
amplifiers
9%
luminescence
8%
etching
8%
modulation
7%
probes
7%
cross sections
6%
decay
6%
curves
6%
thin films
6%
Chemistry
Excited State Absorption
67%
Tungstate
55%
Pump
45%
Energy Transfer
40%
Erbium
39%
Spectroscopy
30%
Liquid Phase Epitaxy
25%
Wavelength
22%
Etching
14%
Luminiscence Type
11%