Two-photon absorption in semiconductors with picosecond laser pulses

1976 ◽  
Vol 13 (8) ◽  
pp. 3515-3522 ◽  
Author(s):  
J. H. Bechtel ◽  
W. L. Smith
Keyword(s):  
Picosecond Laser ◽  
Laser Pulses ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Picosecond Laser Pulses

GIANT TWO-PHOTON ABSORPTION INTO EXCITED STATES OF BIEXCITON

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3765-3768
Author(s):  
I. DMITRUK ◽  
A. KASUYA ◽  
T. GOTO ◽  
Z. YANCHUK
Keyword(s):  
Absorption Spectra ◽  
Excited States ◽  
Direct Method ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Binding Energies ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
First Time

Excited states of excitonic molecule have been observed for the first time by direct method of giant two-photon absorption in monoclinic ZnP 2 single crystal. Two excited states with binding energies 3.3 meV and 1.9 meV have been observed in absorption spectra of intense picosecond laser pulses. First one corresponds to rotational excited state. Interpretation of the second one and details of nonlinear absorption spectra are discussed.

NONLINEAR OPTICAL WAVEGUIDE SPECTROSCOPY OF POLY(3-BUTYLTHIOPHENE)

2010 ◽  
Vol 19 (02) ◽  
pp. 269-280 ◽  
Author(s):  
MOHAMAD JAHJA ◽  
CHRISTOPH BUBECK
Keyword(s):  
Refractive Index ◽  
Optical Waveguide ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Slab Waveguides ◽  
Two Photon ◽  
All Optical ◽  
Data Yield

We prepared thin films of the conjugated polymer poly(3-butylthiophene) by spin-coating and performed transmission and reflection spectroscopy to characterize the dispersion of linear refractive index and absorption coefficient at in-plane polarization. Slab waveguides of this regiorandom polythiophene derivative have mode propagation losses smaller than 1 dB/cm at wavelengths larger than 1000 nm. We determined the nonlinear refractive index and two-photon absorption of slab waveguides by means of intensity-dependent prism coupling using picosecond laser pulses in the range 700–1300 nm. These data yield the dispersion of the figures of merit, which appear promising for all-optical waveguide switching at wavelengths larger than 1200 nm.

Two-photon photoemission from metals induced by picosecond laser pulses

1977 ◽  
Vol 15 (10) ◽  
pp. 4557-4563 ◽  
Author(s):  
J. H. Bechtel ◽  
W. Lee Smith ◽  
N. Bloembergen
Keyword(s):  
Picosecond Laser ◽  
Laser Pulses ◽  
Two Photon ◽  
Picosecond Laser Pulses

Plasmon-Enhanced Two-Photon Absorption of Infrared Femtosecond Laser Pulses in Thin Gold Films

JETP Letters ◽  
2019 ◽  
Vol 109 (6) ◽  
pp. 382-386 ◽  
Author(s):  
S. I. Kudryashov ◽  
P. A. Danilov ◽  
S. G. Bezhanov ◽  
A. A. Rudenko ◽  
A. A. Ionin ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Photon Absorption ◽  
Gold Films ◽  
Two Photon Absorption ◽  
Two Photon
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