Physics & Astronomy
lasers
100%
ladders
96%
lasing
84%
inversions
74%
population inversion
66%
atoms
63%
photons
41%
neon
38%
pumping
35%
pumps
35%
spin exchange
34%
probes
34%
Raman spectra
32%
ionization
30%
excitation
29%
spectroscopy
29%
magnetometers
26%
rare gases
23%
autodynes
23%
dye lasers
22%
interference
21%
compressing
20%
energy transfer
20%
gas mixtures
20%
autoionization
19%
pulsed lasers
19%
pulses
19%
thresholds
18%
augmentation
18%
optogalvanic spectroscopy
17%
x rays
16%
optical radar
15%
cones
15%
amorphous materials
15%
configurations
14%
sodium
14%
cells
13%
statistics
13%
sodium vapor
13%
Raman spectroscopy
13%
metal vapors
13%
forbidden transitions
13%
perovskites
12%
hollow cathodes
11%
ground state
11%
gas discharge tubes
11%
mirrors
11%
color
11%
tubes
10%
retarding
10%
Engineering & Materials Science
Lasers
94%
Dye lasers
66%
Atoms
63%
Ladders
51%
Photons
49%
Amorphization
48%
Neon
40%
Raman scattering
38%
Spectroscopy
34%
Laser pulses
31%
Sodium
29%
Stark effect
28%
Distributed feedback lasers
28%
Perovskite
28%
Superconducting materials
27%
Electrons
24%
Vapors
24%
Pulsed lasers
22%
Four wave mixing
22%
Cathodes
20%
Microspheres
18%
Magnetometers
18%
Optical radar
17%
Relaxation
16%
Semiconductor quantum wells
16%
Amplification
15%
Polarization
15%
Bessel functions
15%
Gas discharge tubes
14%
Synchrotrons
13%
Absorption spectra
13%
Coherent scattering
13%
X rays
12%
Laser beams
12%
Refractive index
12%
Temperature
12%
Ionization
12%
Masers
12%
Dimerization
12%
Superconducting transition temperature
11%
Excited states
11%
Mirrors
11%
Surface phenomena
11%
Raman spectroscopy
11%
Magnetic field measurement
11%
Phase matching
10%
Positive ions
10%
Light absorption
10%
Harmonic generation
10%
Pumping (laser)
10%