Optical nonlinearities of (TBA) 2 Ni(dmit)2: saturable-absorption and negative third-order nonlinear refraction due to charge-transfer transition

2001 ◽  
Author(s):  
Chuan-Lang Zhan ◽  
Wei Xu ◽  
Deqing Zhang ◽  
Dehuan Li ◽  
Zhen-Zhong Lu ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Nonlinear Refraction ◽  
Saturable Absorption ◽  
Optical Nonlinearities ◽  
Charge Transfer Transition ◽  
Third Order

Homoconjugated Push-Pull and Spiro Systems: Intramolecular Charge-Transfer Interactions and Third-Order Optical Nonlinearities

2010 ◽  
Vol 49 (35) ◽  
pp. 6207-6211 ◽  
Author(s):  
Shin-ichiro Kato ◽  
Marten T. Roberts Beels ◽  
Philip La Porta ◽  
W. Bernd Schweizer ◽  
Corinne Boudon ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Optical Nonlinearities ◽  
Third Order

THIRD-ORDER NONLINEAR OPTICAL PROPERTIES OF [(C2H5)4N][Co(dmit)2] USING Z-SCAN TECHNIQUE

2008 ◽  
Vol 22 (03) ◽  
pp. 191-198 ◽  
Author(s):  
XI ZHANG ◽  
QUAN REN ◽  
WEN-FENG GUO ◽  
XIANG-BING SUN ◽  
XIN-QIANG WANG ◽  
...  
Keyword(s):  
Optical Properties ◽  
Absorption Coefficient ◽  
Nonlinear Absorption ◽  
Nonlinear Optical ◽  
Nonlinear Refraction ◽  
Optical Limiting ◽  
Optical Nonlinearities ◽  
Refraction Coefficient ◽  
Third Order ◽  
Potential Applications

A novel dmit 2- complex: [( C 2 H 5)4 N][Co(dmit) 2], abbreviated as EtCo , was synthesized and its third-order optical nonlinearities were characterized by Z-scan technique at the wavelength of 1064 nm with laser duration of 40 ps. Z-scan curves revealed a negative nonlinear refraction at 1064 nm and a positive absorption was observed. The nonlinear refraction coefficient n2, the nonlinear absorption coefficient β and the molecular second hyperpolarizability γ have been determined to be as large as 9.51×10-19 m 2/ W , 2.19×10-12 m/W and 5.41×10-31 esu respectively, suggesting that this material has potential applications in optical limiting.

Third-order nonlinear optical properties of P3HT studied by nanosecond Z-scan in orthodichlorobenzene

2018 ◽  
Vol 27 (01) ◽  
pp. 1850001
Author(s):  
Feng Wu ◽  
Shunlong Zhao ◽  
Siwen Zhang ◽  
Jiang Lv
Keyword(s):  
Optical Properties ◽  
Absorption Coefficient ◽  
Nonlinear Optical ◽  
Nonlinear Refraction ◽  
Optical Nonlinearity ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Third Order ◽  
Input Intensity ◽  
Nlo Properties

The nonlinear optical (NLO) properties of P3HT in orthodichlorobenzene were investigated at 532[Formula: see text]nm by Z-scan technique in the nanosecond domain. The nonlinear refraction of P3HT solution is up to an order of 10[Formula: see text][Formula: see text]esu and changes the sign from positive to negative with an increase in the input intensity. The reverse saturable absorption of the P3HT solution was observed in the intensity range of the measurements and their nonlinear absorption coefficient reaches an order of 102[Formula: see text]cm/GW. The strong optical nonlinearity perhaps allows them to be widely applied in the photoelectric field.

THIRD-ORDER NONLINEAR OPTICAL PROPERTIES OF [C7H7(C2H5)3N][Ni(dmit)2] USING Z-SCAN TECHNIQUE

2010 ◽  
Vol 24 (26) ◽  
pp. 2659-2667 ◽  
Author(s):  
JING-WEI CHEN ◽  
QUAN REN ◽  
XIN-QIANG WANG ◽  
HE-LIANG FAN ◽  
QIANG SUN
Keyword(s):  
Optical Properties ◽  
Cross Section ◽  
Nonlinear Optical ◽  
Nonlinear Refraction ◽  
Nonlinear Optical Properties ◽  
Saturable Absorption ◽  
Third Order ◽  
Intensity Dependence ◽  
Focusing Effect ◽  
Self Focusing

A novel dmit 2- complex: [ C 7 H 7( C 2 H 5)3 N ][ Ni ( dmit )2], abbreviated as BTEANDT, was synthesized and its third-order nonlinear optical properties were investigated by Z-scan technique at the wavelength of 1064 nm with laser duration of 20 ps. A self-focusing effect and a saturable absorption were observed. The nonlinear refraction coefficient n2 and the nonlinear absorption coefficient β have been found to be 7.311 × 10-18 m 2/W and -6.064 cm/GW when I0=3.025 GW/cm2. The intensity dependence curve of β was also studied and the result reveals that β is proportional to I0. We explained the result with the theory of absorption cross-section.

scholarly journals Surface Plasmon Resonance Dependent Third-Order Optical Nonlinearities of Silver Nanoplates

Photonics ◽  
2021 ◽  
Vol 8 (8) ◽  
pp. 299
Author(s):  
Marcello Condorelli ◽  
Vittorio Scardaci ◽  
Mario Pulvirenti ◽  
Luisa D’Urso ◽  
Fortunato Neri ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Optical Limiting ◽  
Pulse Generation ◽  
Saturable Absorption ◽  
Nanosecond Laser ◽  
Reverse Saturable Absorption ◽  
Optical Nonlinearities ◽  
Third Order

A systematic study of the surface plasmon resonance (SPR)-dependent nonlinear optical response of Ag nanoplates is presented and discussed. The Ag nanoplates were synthesized using the well-known seed-mediated growth method. By performing the z-scan method with a nanosecond laser (532 nm, 5 ns), the optical nonlinearities of the Ag nanoplates, prepared tuning the SPR contribution in the 400–1000 nm range, were determined. The results showed a SPR-related competition between the saturable absorption and reverse saturable absorption mechanisms, while the nonlinear refraction changed from self-defocusing to self-focusing. Furthermore, the scattering effects contribute to determine the nature of the optical limiting response. The observed SPR-tunable third order optical nonlinearities make Ag nanoplates a suitable candidate to be used in different fields, i.e., laser pulse generation, optical limiting, or bio-imaging applications.

Colossal Barocaloric Effect by Large Latent Heat Produced by First‐Order Intersite‐Charge‐Transfer Transition

2021 ◽  
pp. 2009476
Author(s):  
Yoshihisa Kosugi ◽  
Masato Goto ◽  
Zhenhong Tan ◽  
Asaya Fujita ◽  
Takashi Saito ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Latent Heat ◽  
Charge Transfer Transition ◽  
First Order

scholarly journals Highly efficient THz four-wave mixing in doped silicon

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Nils Dessmann ◽  
Nguyen H. Le ◽  
Viktoria Eless ◽  
Steven Chick ◽  
Kamyar Saeedi ◽  
...  
Keyword(s):  
Four Wave Mixing ◽  
Wave Mixing ◽  
Optical Nonlinearities ◽  
Third Order ◽  
Picosecond Pulses ◽  
Light Pulses ◽  
A Value ◽  
Doped Silicon ◽  
Perturbative Regime ◽  
Silicon Doped

AbstractThird-order non-linearities are important because they allow control over light pulses in ubiquitous high-quality centro-symmetric materials like silicon and silica. Degenerate four-wave mixing provides a direct measure of the third-order non-linear sheet susceptibility χ(3)L (where L represents the material thickness) as well as technological possibilities such as optically gated detection and emission of photons. Using picosecond pulses from a free electron laser, we show that silicon doped with P or Bi has a value of χ(3)L in the THz domain that is higher than that reported for any other material in any wavelength band. The immediate implication of our results is the efficient generation of intense coherent THz light via upconversion (also a χ(3) process), and they open the door to exploitation of non-degenerate mixing and optical nonlinearities beyond the perturbative regime.

scholarly journals Colossal Barocaloric Effect: Colossal Barocaloric Effect by Large Latent Heat Produced by First‐Order Intersite‐Charge‐Transfer Transition (Adv. Funct. Mater. 25/2021)

2021 ◽  
Vol 31 (25) ◽  
pp. 2170178
Author(s):  
Yoshihisa Kosugi ◽  
Masato Goto ◽  
Zhenhong Tan ◽  
Asaya Fujita ◽  
Takashi Saito ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Latent Heat ◽  
Charge Transfer Transition ◽  
First Order
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