Optical Power Limiters for Nanosecond Pulses: Design of New Dendritic Chromophores with Exceptionally Large Two-Photon Cross-Sections

1999 ◽  
Vol 597 ◽  
Author(s):  
E. H. Elandaloussi ◽  
C. Spangler ◽  
M. Casstevens ◽  
D. Kumar ◽  
J. Weibel ◽  
...  
Keyword(s):  
Cross Sections ◽  
Optical Power ◽  
Optical Nonlinearity ◽  
Photon Absorption ◽  
Laser Dyes ◽  
Structure Property ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Structure Property Relationships ◽  
Nanosecond Pulses

AbstractOver the past five years there has been a renaissance in design studies of chromophores with the possibility of enhanced two-photon absorption (TPA). While two-photon absorption has been described for molecules such as laser dyes in solution for a number of years1, it has only been recently that researchers have attempted detailed structure-property relationships to elucidate how new chromophores with greatly enhanced two-photon cross-sections might be designed. Since the intrinsic cross-sections are related to the Im component of the third order optical nonlinearity, it should come as no surprise that much of the previous work in the literature which focused on structure-property relationships for molecules with enhanced NLO response might be applicable to the design of new TPA chromophores. In this presentation we will review our recent studies in this area, and our rationale for the applicability of dendritic strctures based on photonic-active repeat units for enhancment of two-photon absorption, particularly in the area of optical power limiting applications.

scholarly journals Uncovering Structure–Property Relationships in Push–Pull Chromophores: A Promising Route to Large Hyperpolarizability and Two-Photon Absorption

2020 ◽  
Vol 124 (29) ◽  
pp. 15739-15748
Author(s):  
Alessio Cesaretti ◽  
Paolo Foggi ◽  
Cosimo G. Fortuna ◽  
Fausto Elisei ◽  
Anna Spalletti ◽  
...  
Keyword(s):  
Photon Absorption ◽  
Structure Property ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Structure Property Relationships

scholarly journals Fluorescence and two-photon absorption of push–pull aryl(bi)thiophenes: structure–property relationships

2012 ◽  
Vol 11 (11) ◽  
pp. 1756 ◽  
Author(s):  
Emilie Genin ◽  
Vincent Hugues ◽  
Guillaume Clermont ◽  
Cyril Herbivo ◽  
M. Cidália R. Castro ◽  
...  
Keyword(s):  
Photon Absorption ◽  
Structure Property ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Structure Property Relationships

Rationally designed two-photon absorption compounds based on benzoxazole derivatives: structure–property relationships and bio-imaging applications

2016 ◽  
Vol 4 (16) ◽  
pp. 2785-2793 ◽  
Author(s):  
Xinping Ge ◽  
Xiaoping Gan ◽  
Shun Yao ◽  
Kang Wang ◽  
Weiju Zhu ◽  
...  
Keyword(s):  
Photon Absorption ◽  
Structure Property ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Structure Property Relationships ◽  
Bio Imaging

Five rationally designed benzoxazole-based two photon absorption compounds were reported and their structure–property relationships were summarized clearly.

scholarly journals A difluorenyl-carbo-cyclohexadiene: prospective chromophore for two-photon absorption

2018 ◽  
Vol 6 (2) ◽  
pp. 9-17 ◽  
Author(s):  
Iaroslav Baglai ◽  
Gabriel Ramos-Ortiz ◽  
José-Luis Maldonado ◽  
Zoia Voitenko ◽  
Valérie Maraval ◽  
...  
Keyword(s):  
Cross Section ◽  
Photon Absorption ◽  
Structure Property ◽  
Green Fluorescence ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Structure Property Relationships ◽  
Cyclization Process

For the purpose of outlining structure-property relationships for two-photon absorption (2PA), a "s-locked" carbo-cyclohexadiene with two fluorenyl substituents has been envisaged for comparison with previously studied aromatic carbo-benzene and non-aromatic carbo-quinoid congeners. A representative where the C10-π-conjugated fluorenyl moieties are also connected by a C8-π-insulating 3,6‐dimethoxy‐3,6‐bis(trifluoromethyl)octa‐1,4,7‐triyn-1,8-diyl edge has thus been synthesized in four steps from known C8F triyne and C10 triynyldial, through a [8F+10] cyclization process. In spite of a relatively strong absorbance (e = 84 800 L.mol-1.cm-1 at 634 nm), the non-vanishing green fluorescence (at 533 nm) of the chromophore should allow measurements of the 2PA cross section by both the TPEF and Z-scan methods.

Design, Synthesis and Characterization of New Bimechanistic Optical Power Limiters Based on Reverse Saturable and Two-photon Absorption

1999 ◽  
Vol 597 ◽  
Author(s):  
C. W. Spangler ◽  
E. H. Elandaloussi ◽  
B. Ozer ◽  
K. Ashworth ◽  
L. Madrigal ◽  
...  
Keyword(s):  
Cross Sections ◽  
Excited State Absorption ◽  
Optical Power ◽  
Radical Cations ◽  
Optical Limiting ◽  
Photon Absorption ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Two Photon Absorption ◽  
Two Photon

AbstractDuring the past five years there has been considerable progress in the design of organic materials for optical power limiting (OPL) applications. One of the more promising and widely studied material approaches involves reverse saturable absorption (RSA) from various excited states. We have recently been examining the efficacy of utilizing highly absorbing photogenerated charge states for RSA. Both polaronic radical cations and bipolaronic dications are possible candidates for this mode of optical limiting. Equally intriguing are new approaches to designing chromophores with large two-photon absorption (TPA) cross-sections. For some pulse durations the effective two-photon cross-section for bis-(diphenylamino)diphenylpolyenes, and dendrimers based on these repeat units, are extraordinaryly large, indicative of excited state absorption. In this presentation we will discuss the possibility of combining these two optical limiting mechanistic paradigms in single structures, which may then be considered as bimechanistic optical power limiters.

OPTICAL NONLINEARITY VIA PHONONS AS AN INTERMEDIARY

2001 ◽  
Vol 10 (01) ◽  
pp. 65-77 ◽  
Author(s):  
OU FA ◽  
HE MINGGAO ◽  
WU FUGEN
Keyword(s):  
Second Harmonic ◽  
Optical Nonlinearity ◽  
Photon Absorption ◽  
Saturation Phenomenon ◽  
Sum Frequency ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Threshold Phenomenon ◽  
Anti Stokes ◽  
The Given

A new model to describe the origin of optical nonlinearity is presented. In this model, the interaction between light and medium is reduced to the coupling of photons with phonons, which occurs in the crystal lattice vibrating anharmonically. Then the optical nonlinearity originates from the nonlinear photon–phonon coupling or the interaction among phonons themselves. In this paper, more attention is drawn to the latter. By the given model, (1) degenerate and (2) nondegenerate parametric oscillations, (3) Stokes and (4) anti-Stokes Raman scattering, (5) sum-frequency and (6) second harmonic generation and (7) two-photon absorption are dealt with systematically and quantum-mechanically. The results of theoretical analysis show that the effects (1)–(4) are associated with threshold phenomenon, whereas the effects (5)–(7) with the saturation phenomenon.

Small molecules of chalcone derivatives with high two-photon absorption activities in the near-IR region

2016 ◽  
Vol 4 (15) ◽  
pp. 3256-3267 ◽  
Author(s):  
Jingyun Tan ◽  
Yujin Zhang ◽  
Meirong Zhang ◽  
Xiaohe Tian ◽  
Yiming Wang ◽  
...  
Keyword(s):  
Small Molecules ◽  
Photon Absorption ◽  
Structure Property ◽  
Two Photon Absorption ◽  
Chalcone Derivatives ◽  
Two Photon ◽  
Property Relationship ◽  
Near Ir ◽  
Structure Property Relationship

Six thiophene-based chalcone derivatives were synthesized, and their structure–property relationship was investigated systematically. Small molecules as they are, they have showed favorable Φ and σ values in the near-IR region.

Theoretical studies on the one- and two-photon absorption of tetrabenzoporphyrins and phthalocyanines

2004 ◽  
Vol 82 (1) ◽  
pp. 19-26 ◽  
Author(s):  
Xin Zhou ◽  
Ai-Min Ren ◽  
Ji-Kang Feng ◽  
Xiao-Juan Liu
Keyword(s):  
Dipole Moment ◽  
Cross Sections ◽  
Density Functional ◽  
Transition Dipole Moment ◽  
Photon Absorption ◽  
Transition Dipole ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Order Of Magnitude ◽  
The One

The one-photon absorption (OPA) properties of tetrabenzoporphyrins (TBPs) and phthalocyanines (Pcs) were studied using the semiempirical ZINDO method and time-dependent density functional theory (TDDFT), respectively. The compared results confirmed that the semiempirical ZINDO method was reasonably reliable when calculating the OPA of tetrabenzoporphyrins and phthalocyanines. On the basis of the OPA properties obtained from the ZINDO method, two-photon absorption (TPA) properties of two series of molecules were investigated, using ZINDO and sum-over-states (SOS) methods. The results showed that the TPA cross-sections of all molecules were in the range of 220.6 × 10–50 – 345.9 × 10–50 cm4·s·photon–1, which were in the same order of magnitude as the values reported in the literature. The relatively larger δ(ω) value for Pcs with respect to that for corresponding TBPs originates from larger intramolecular charge transfer, which can be characterized by the difference of dipole moment between S0 and S1 and the transition dipole moment between S1 and S5.Key words: two-photon absorption, ZINDO, sum-over-states, tetrabenzoporphyrin, phthalocyanines.

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