Modified carbon nanotubes as broadband optical limiting nanomaterials

2006 ◽  
Vol 21 (11) ◽  
pp. 2758-2766 ◽  
Author(s):  
Kok Chung Chin ◽  
Amarsinh Gohel ◽  
Hendry Izaac Elim ◽  
Weizhe Chen ◽  
Wei Ji ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Laser Pulses ◽  
Optical Limiting ◽  
Film Coating ◽  
Nanosecond Laser ◽  
Optical Limiters ◽  
Optical Limiter ◽  
Recent Developments ◽  
Device Applications ◽  
Modified Carbon Nanotubes

Carbon nanotubes have been shown to be effective broadband optical limiters for nanosecond laser pulses. In this paper, we review the recent developments of carbon nanotube-based optical limiters, in particular the effects of modifying carbon nanotubes for device applications. The techniques used to modify carbon nanotubes mainly include thin film coating, doping, and blending with optical absorbing dye. These modifications can greatly enhance the optical limiting performance of carbon nanotubes, with the goal of fabricating an optimal optical limiter system.

OPTICAL LIMITING STUDIES OF NEW CARBON NANOCOMPOSITES AND AMORPHOUS SixNy OR AMORPHOUS SiC COATED MULTI-WALLED CARBON NANOTUBES

2004 ◽  
Vol 13 (02) ◽  
pp. 275-289 ◽  
Author(s):  
HENDRY IZAAC ELIM ◽  
WEIZHE CHEN ◽  
WEI JI ◽  
ZIYI ZHONG ◽  
JIANYI LIN ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Amorphous Silicon ◽  
Laser Pulses ◽  
Optical Limiting ◽  
Nanosecond Laser ◽  
Transmission Measurement ◽  
Carbon Nanocomposites ◽  
Multi Walled Carbon Nanotubes ◽  
Amorphous Sic ◽  
Walled Carbon Nanotubes

By using fluence-dependent transmission measurement with nanosecond laser pulses, we have studied optical limiting (OL) properties of new carbon nanocomposites as well as amorphous Si x N y or amorphous SiC coated carbon nanotubes suspended in distilled water. The observed nonlinearity at 532 nm contributed to OL performance of the carbon nanocomposites or carbon nanoballs (CNBs) is suggested to have its origin in the optically induced heating or scattering effects. It is found that when the linear transmittance of the CNBs is less than or equal to 70%, the intensity-dependent transmission of the CNBs is comparable to that of C 60. While at 80% linear transmittance, CNBs possess better OL behavior than that of C 60. These findings strongly support a potential application of CNBs for all laser protection devices. We have also observed OL effects in the amorphous silicon nitride ( a - Si x N y) and amorphous silicon carbide ( a - SiC ) coated multi-walled carbon nanotubes (MWNTs) at wavelengths of 532 and 1064 nm, and found that their OL performances are slightly poorer than that of their parent MWNTs. The possible sources of thickness-dependent OL effects of a - Si x N y and a - SiC coated MWNTs are discussed.

NANOMATERIALS AS OPTICAL LIMITERS

2000 ◽  
Vol 09 (04) ◽  
pp. 481-503 ◽  
Author(s):  
YA-PING SUN ◽  
JASON E. RIGGS ◽  
KEVIN B. HENBEST ◽  
ROBERT B. MARTIN
Keyword(s):  
Carbon Nanotubes ◽  
Nonlinear Absorption ◽  
Carbon Nanoparticles ◽  
Carbon Materials ◽  
Optical Limiting ◽  
Experimental Results ◽  
Nonlinear Scattering ◽  
Optical Limiters ◽  
Physico Chemical ◽  
Chemical States

Optical limiters based on several different classes of nanomaterials are reviewed. The systems under consideration include metal and semiconductor nanoparticles and nanoscale carbon materials. For the latter, the optical limiting properties of carbon nanoparticles, fullerenes, and suspended and solubilized carbon nanotubes are summarized and compared. Mechanistic implications of the available experimental results are discussed in terms of the comparison between nonlinear scattering versus nonlinear absorption as the dominating optical limiting mechanism for different nanomaterials and for different physico-chemical states of a nanomaterial.

Z-scan studies and optical limiting of nanosecond laser pulses in neutral red dye

2008 ◽  
Vol 40 (2) ◽  
pp. 373-378 ◽  
Author(s):  
Mathew George ◽  
C.I. Muneera ◽  
C.P. Singh ◽  
K.S. Bindra ◽  
S.M. Oak
Keyword(s):  
Laser Pulses ◽  
Optical Limiting ◽  
Neutral Red ◽  
Nanosecond Laser ◽  
Nanosecond Laser Pulses ◽  
Red Dye

Optical limiting properties of BODIPY dyes substituted with styryl or vinylene groups on the nanosecond timescale

2019 ◽  
Vol 23 (07n08) ◽  
pp. 701-717 ◽  
Author(s):  
Nobuhle Ndebele ◽  
Zweli Hlatshwayo ◽  
Bokolombe P. Ngoy ◽  
Gugu Kubheka ◽  
John Mack ◽  
...  
Keyword(s):  
Thin Films ◽  
Absorption Coefficient ◽  
Laser Pulses ◽  
Optical Limiting ◽  
Nanosecond Laser ◽  
Third Order ◽  
The Third ◽  
Nanosecond Laser Pulses ◽  
532 Nm ◽  
Order Susceptibility

The results of recent studies on the optical limiting properties of BODIPY dyes at 532 and 1064 nm are described and compared. The optical limiting properties of novel 1,7-dimethyl-3,5-di-4-dihydroxyborylstyryl- and 3,5,7-tristyryl-1-methyl-BODIPY dyes were studied in CH2Cl2 and C6H6 and polystyrene thin films using the open aperture Z-scan technique at 532 nm with nanosecond laser pulses to provide an example of how the effective nonlinear absorption coefficient, the third order susceptibility, hyperpolarizability and limiting thresholds can be calculated.

Wavelength Dispersion of Optical Power Limiting in Stilbene3 Analyzed within a Three Level Model

1999 ◽  
Vol 597 ◽  
Author(s):  
P-A. Chollet ◽  
A. Somin ◽  
B. Paci ◽  
V. Hully ◽  
J-M. Nunzi ◽  
...  
Keyword(s):  
Excited State Absorption ◽  
Optical Power ◽  
Laser Pulses ◽  
Optical Limiting ◽  
Photon Absorption ◽  
Visible Range ◽  
Nanosecond Laser ◽  
Nonlinear Transmission ◽  
Two Photon ◽  
Level Model

AbstractNonlinear transmission in a dye (stilbene3) exhibiting two-photon absorption (TPA) has been studied has a function of wavelength, in the visible range using nanosecond laser pulses. The results have been analyzed within a three level model: the first excited one is populated by TPA and is excited toward an upper level (excited state absorption, ESA). The TPA and ESA spectra obtained by optical limiting (δ∼10-46 cm4s photon-1molecule-1; δ∼ 10-16 cm2) are in good agreement with those determined by two-photon fluorescence and Kerr ellipsometry. Thus, nonlinear transmission appears as a useful technique to estimate the TPA and ESA contributions in optical limiting.

Non-Linear Light Scattering in a Two Component Medium Optical Limiting Application

1997 ◽  
Vol 479 ◽  
Author(s):  
V. Joudrier ◽  
J C. Fabre ◽  
P. Bourdon ◽  
F. Hache ◽  
C Flytzanis
Keyword(s):  
Light Scattering ◽  
Laser Pulses ◽  
Optical Limiting ◽  
Spherical Particles ◽  
Nanosecond Laser ◽  
Two Component ◽  
Non Linear ◽  
Nanosecond Laser Pulses ◽  
532 Nm ◽  
Surrounding Liquid

AbstractThe first experimental investigation of an optical limiting device based on a suspension of spherical particles in a surrounding liquid is presented. The expected property is the non-linear light scattering based on a refractive index mismatch between the two components that appears at high intensity. Several experiments performed at 532 nm with nanosecond laser pulses provide good indication that such non-linear scattering is observed.

Low Threshold ZnSe1−x Tex Optical Limiters

1994 ◽  
Vol 374 ◽  
Author(s):  
W. Ji ◽  
H. S. Tan ◽  
Z. C. Feng ◽  
P. Becla
Keyword(s):  
Laser Pulses ◽  
Free Carrier ◽  
Charge Carriers ◽  
Nanosecond Laser ◽  
Free Charge ◽  
Limiting Behavior ◽  
Optical Limiters ◽  
Low Threshold ◽  
Nanosecond Laser Pulses ◽  
Limiting Threshold

AbstractWe report an experimental investigation of optical limiting with bulk ZnSe1−xTex crystals at wavelengths just below the band edge, using nanosecond laser pulses. The limiting threshold as low as a few mJ/cm2 has been demonstrated. The generation of free charge carriers by singlephoton absorption, and subsequent free-carrier nonlinearities (nonlinear absorption and selfdefocusing) are responsible for the limiting behavior.

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