Saturable and reverse saturable absorption in silver nanodots at 532 nm using picosecond laser pulses

2008 ◽  
Vol 104 (7) ◽  
pp. 073107 ◽  
Author(s):  
Ullas Gurudas ◽  
Elijah Brooks ◽  
Daniel M. Bubb ◽  
Sebastian Heiroth ◽  
Thomas Lippert ◽  
...  
Keyword(s):  
Picosecond Laser ◽  
Laser Pulses ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Picosecond Laser Pulses ◽  
Silver Nanodots ◽  
532 Nm

Synthesis of Silver Nanowires and Investigation of their Optical Limiting Properties

2011 ◽  
Vol 295-297 ◽  
pp. 152-155 ◽  
Author(s):  
Ya Ping Han ◽  
Ming Hai Luo ◽  
Qing Wen Wang ◽  
Jin Xin Wang ◽  
Xue Lian Gao
Keyword(s):  
Silver Nanowires ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Optical Limiting ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
X Ray Diffraction ◽  
Current Electric Field ◽  
532 Nm ◽  
State Ionic

Silver nanowires were fabricated in a direct current electric field using a solid-state ionic method, and were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The reverse saturable absorption and optical limiting properties in silver nanowires, suspended in de-ionized water were investigated by using an EKSPLA (PL2143A) picosecond laser, which produced 30 ps laser pulses at 532 nm with a repetition rate of 2 Hz. Experimental results indicate silver nanowires have obvious optical limiting properties.

scholarly journals Tunable Picosecond Laser Pulses via the Contrast of Two Reverse Saturable Absorption Phases in a Waveguide Platform

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Yang Tan ◽  
Lianwei Chen ◽  
Dong Wang ◽  
Yanxue Chen ◽  
Shavkat Akhmadaliev ◽  
...  
Keyword(s):  
Picosecond Laser ◽  
Laser Pulses ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Picosecond Laser Pulses

Calculation of Carrier and Lattice Temperatures Induced in Si and GaAs By Picosecond Laser Pulses

1981 ◽  
Vol 4 ◽  
Author(s):  
A. Lietoila ◽  
J. F. Gibbons
Keyword(s):  
Crystalline Silicon ◽  
Variable Parameter ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Hot Carriers ◽  
Thermalization Time ◽  
Picosecond Laser Pulses ◽  
Carrier Temperature ◽  
Energy Relaxation Time ◽  
532 Nm

ABSTRACTA previously presented computer model was used to calculate melt thresholds and carrier temperatures in crystalline silicon and gallium arsenide subjected to picosecond laser pulses at 532 nm. The energy relaxation time of hot carriers was a variable parameter. For Si, a thermalization time of 1 ps yields results which are in very satisfactory agreement with published experimental data: the melt threshold is 0.19 J/cm2, and the maximum carrier temperature for the threshold pulse is 5500 K. The melt threshold in GaAs is substantially less, 0.03 J/cm2 for a thermalization time of 1 ps.

Nonlinear Optical Properties of Modified Carbocyanines

1997 ◽  
Vol 479 ◽  
Author(s):  
Nansheng Tang ◽  
Weijie Su ◽  
Thomas M. Cooper ◽  
Daniel G. McLean ◽  
Donna M. Brandelik ◽  
...  
Keyword(s):  
Cross Sections ◽  
Excited State Absorption ◽  
Laser Pulses ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Pump Probe ◽  
Chirped Pulses ◽  
Molecular Hyperpolarizability ◽  
Meso Position ◽  
532 Nm

AbstractWe studied the optical nonlinearities of modified 3,3′-diethylthiadicarbocyanine iodides (X-DTDCI) in dimethyl sulfoxide (DMSO) solutions (X = H, Cl, Br at meso position) by a pump-probe technique with crossed polarized chirped laser pulses at room temperature. Reverse-saturable-absorption (RSA) with monoexponential lifetimes is observed at 532 nm in all the samples studied. We determined the effective excited-state absorption cross-sections and their lifetimes for all the samples investigated and found that they clearly correlate to the substituent X at the meso position. Empowered by the chirped pulses, a much faster nonlinearity with a decay time of ˜3.1 ps that is much shorter than the laser pulses used, is unveiled in Cl-DTDCI. We expressed both the absorptive and the refractive part of this fast nonlinearity as the equivalent molecular hyperpolarizability γ1212 and found γ1212 = (8.1 + i9.8) × 10−32erg−1.

Saturable absorption behavior of (5,10,15,20-tetraphenylporphyrinato)-silver crystal thin film at wavelength 532 nm

2020 ◽  
Vol 25 (01) ◽  
pp. 19-23
Author(s):  
Yali Hu ◽  
Tingbin Li
Keyword(s):  
Thin Film ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Basis Set ◽  
Saturable Absorption ◽  
Hartree Fock ◽  
Direct Growth ◽  
Linear Optical Properties ◽  
Quartz Substrates ◽  
532 Nm

A single crystal of (5,10,15,20-tetraphenylporphyrinato)-silver was obtained and its structure reported. Using direct growth on quartz substrates method, a crystal thin film was obtained and the film’s morphology was investigated by atomic force microscopy. The nonlinear absorption properties of the film were studied using open aperture [Formula: see text]-scan technique by picosecond laser pulses at different fluence at wavelength 532 nm, nonlinear saturable absorption behavior was observed. Time-dependent unrestricted Hartree-Fock with the basis set LanL2DZ was used in computing the linear and non-linear optical properties of (5,10,15,20-tetraphenylporphyrinato)-silver.

Imaging of Silicon Naphthalocyanine in Toluene

1997 ◽  
Vol 479 ◽  
Author(s):  
R. J. Becker ◽  
R. V. Goedert ◽  
A. F. Clements ◽  
T. A. Whittaker
Keyword(s):  
Spherical Aberration ◽  
Scattered Light ◽  
Pulsed Laser ◽  
Laser Pulses ◽  
Scattering Data ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Plasma Absorption ◽  
Pulse Energies ◽  
532 Nm

AbstractPulsed-laser shadowgraphs and images of scattered light are combined with limiting and scattering data to build a model of the response of silicon napthalocyanine (SiNc) at concentrations on the order of 10−3 M in toluene to 12–16 ns 532 nm laser pulses over an energy range from 10 nJ to 2 mJ. The inherent spherical aberration induced by the sample has a profound effect on the response. The scattering is extremely intense above pulse energies of 100 μJ. The data indicates the response at pulse energies below 300 mJ is due to reverse saturable absorption. Full absorbance is not observed until the agglomerates vaporize. At fluences approaching 1 J/cm2 a plasma begins to form and the liquid near the window starts to boil. Intense scatter from the boiling liquid combined with plasma absorption produces hard clamping.

Electric field probing by picosecond laser pulses

1992 ◽  
Vol 28 (12) ◽  
pp. 1137 ◽  
Author(s):  
A. Krotkus ◽  
V. Pašiškevičius
Keyword(s):  
Electric Field ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Picosecond Laser Pulses

Analogic Transmission Of Picosecond Laser Pulses Through Optical Step Index Optical Fiber

1985 ◽  
Author(s):  
C. Cavailler ◽  
D. Gontier ◽  
J. Launspach ◽  
C. Froehly ◽  
D. Largeau ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Step Index ◽  
Picosecond Laser Pulses
Sign in / Sign up

Export Citation Format

Share Document