scholarly journals Large negative n2 and two-photon absorption in 2D PdSe2 films ACS AMI OSF

2020 ◽  
Author(s):  
David Moss
Keyword(s):  
High Performance ◽  
Nonlinear Optical ◽  
Laser Intensity ◽  
Nonlinear Refraction ◽  
Kerr Nonlinearity ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Photon Absorption ◽  
Closed Aperture ◽  
Third Order

We report a large third-order nonlinear optical response of palladium diselenide (PdSe2) films – a two-dimensional (2D) noble metal dichalcogenide material. Both open-aperture (OA) and closed-aperture (CA) Z-scan measurements are performed with a femtosecond pulsed laser at 800 nm to investigate the nonlinear absorption and nonlinear refraction, respectively. In the OA experiment, we observe optical limiting behaviour originating from large two photo absorption (TPA) in the PdSe2 film of β = 3.26 ×10-8 m/W. In the CA experiment, we measure a peak-valley response corresponding to a large and negative Kerr nonlinearity of n2 = -1.33×10-15 m2/W – two orders of magnitude larger than bulk silicon. We also characterize the variation of n2 as a function of laser intensity, observing that n2 decreases in magnitude with incident laser intensity, becoming saturated at n2 = -9.96×10-16 m2/W at high intensities. These results verify the large third-order nonlinear optical response of 2D PdSe2 as well as its strong potential for high performance nonlinear photonic devices.

scholarly journals Large and negative self-defocusing optical Kerr nonlinearity in Palladium di-Selenide 2D films

2021 ◽  
Author(s):  
David Moss
Keyword(s):  
High Performance ◽  
Nonlinear Optical ◽  
Laser Intensity ◽  
Nonlinear Refraction ◽  
Kerr Nonlinearity ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Closed Aperture ◽  
Third Order ◽  
Limiting Behaviour

Abstract We report a large third-order nonlinear optical response of palladium diselenide (PdSe2) films – a two-dimensional (2D) noble metal dichalcogenide material. Both open-aperture (OA) and closed-aperture (CA) Z-scan measurements are performed with a femtosecond pulsed laser at 800 nm to investigate the nonlinear absorption and nonlinear refraction, respectively. In the OA experiment, we observe optical limiting behaviour originating from large two photo absorption (TPA) in the PdSe2 film of β = 3.26 ×10− 8 m/W. In the CA experiment, we measure a peak-valley response corresponding to a large and negative Kerr nonlinearity of n2 = -1.33×10− 15 m2/W – two orders of magnitude larger than bulk silicon. We also characterize the variation of n2 as a function of laser intensity, observing that n2 decreases in magnitude with incident laser intensity, becoming saturated at n2 = -9.96×10− 16 m2/W at high intensities. These results verify the large third-order nonlinear optical response of 2D PdSe2 as well as its strong potential for high performance nonlinear photonic devices.

scholarly journals Large Kerr nonlinearity in PdS2 2D films

2020 ◽  
Author(s):  
linnan jia ◽  
Jiayang Wu ◽  
Baohua Jiao ◽  
Tieshan Yang ◽  
David Moss
Keyword(s):  
High Performance ◽  
Nonlinear Optical ◽  
Laser Intensity ◽  
Nonlinear Refraction ◽  
Kerr Nonlinearity ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Closed Aperture ◽  
Third Order ◽  
Limiting Behaviour

<p>We report a large third-order nonlinear optical response of palladium diselenide (PdSe<sub>2</sub>) films – a two-dimensional (2D) noble metal dichalcogenide material. Both open-aperture (OA) and closed-aperture (CA) Z-scan measurements are performed with a femtosecond pulsed laser at 800 nm to investigate the nonlinear absorption and nonlinear refraction, respectively. In the OA experiment, we observe optical limiting behaviour originating from large two photo absorption (TPA) in the PdSe<sub>2</sub> film of <i>β =</i> 3.26 × 10<sup>-8</sup> m/W. In the CA experiment, we measure a peak-valley response corresponding to a large and negative Kerr nonlinearity of <i>n</i><sub>2</sub> = -1.33×10<sup>-15</sup> m<sup>2</sup>/W – two orders of magnitude larger than bulk silicon. We also characterize the variation of <i>n</i><sub>2</sub> as a function of laser intensity, observing that <i>n</i><sub>2</sub> decreases in magnitude with incident laser intensity, becoming saturated at <i>n</i><sub>2</sub> = -9.96×10<sup>-16</sup> m<sup>2</sup>/W at high intensities. These results verify the large third-order nonlinear optical response of 2D PdSe<sub>2</sub> as well as its strong potential for high performance nonlinear photonic devices.</p>

scholarly journals Large Kerr nonlinearity in PdSe2 2D films

2020 ◽  
Author(s):  
linnan jia ◽  
Jiayang Wu ◽  
Baohua Jiao ◽  
Tieshan Yang ◽  
David Moss
Keyword(s):  
High Performance ◽  
Nonlinear Optical ◽  
Laser Intensity ◽  
Nonlinear Refraction ◽  
Kerr Nonlinearity ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Closed Aperture ◽  
Third Order ◽  
Limiting Behaviour

<p>We report a large third-order nonlinear optical response of palladium diselenide (PdSe<sub>2</sub>) films – a two-dimensional (2D) noble metal dichalcogenide material. Both open-aperture (OA) and closed-aperture (CA) Z-scan measurements are performed with a femtosecond pulsed laser at 800 nm to investigate the nonlinear absorption and nonlinear refraction, respectively. In the OA experiment, we observe optical limiting behaviour originating from large two photo absorption (TPA) in the PdSe<sub>2</sub> film of <i>β =</i> 3.26 × 10<sup>-8</sup> m/W. In the CA experiment, we measure a peak-valley response corresponding to a large and negative Kerr nonlinearity of <i>n</i><sub>2</sub> = -1.33×10<sup>-15</sup> m<sup>2</sup>/W – two orders of magnitude larger than bulk silicon. We also characterize the variation of <i>n</i><sub>2</sub> as a function of laser intensity, observing that <i>n</i><sub>2</sub> decreases in magnitude with incident laser intensity, becoming saturated at <i>n</i><sub>2</sub> = -9.96×10<sup>-16</sup> m<sup>2</sup>/W at high intensities. These results verify the large third-order nonlinear optical response of 2D PdSe<sub>2</sub> as well as its strong potential for high performance nonlinear photonic devices.</p>

scholarly journals Large Kerr nonlinearity in PdSe2 2D films

2020 ◽  
Author(s):  
linnan jia ◽  
Jiayang Wu ◽  
Baohua Jiao ◽  
Tieshan Yang ◽  
David Moss
Keyword(s):  
High Performance ◽  
Nonlinear Optical ◽  
Laser Intensity ◽  
Nonlinear Refraction ◽  
Kerr Nonlinearity ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Closed Aperture ◽  
Third Order ◽  
Limiting Behaviour

<p>We report a large third-order nonlinear optical response of palladium diselenide (PdSe<sub>2</sub>) films – a two-dimensional (2D) noble metal dichalcogenide material. Both open-aperture (OA) and closed-aperture (CA) Z-scan measurements are performed with a femtosecond pulsed laser at 800 nm to investigate the nonlinear absorption and nonlinear refraction, respectively. In the OA experiment, we observe optical limiting behaviour originating from large two photo absorption (TPA) in the PdSe<sub>2</sub> film of <i>β =</i> 3.26 × 10<sup>-8</sup> m/W. In the CA experiment, we measure a peak-valley response corresponding to a large and negative Kerr nonlinearity of <i>n</i><sub>2</sub> = -1.33×10<sup>-15</sup> m<sup>2</sup>/W – two orders of magnitude larger than bulk silicon. We also characterize the variation of <i>n</i><sub>2</sub> as a function of laser intensity, observing that <i>n</i><sub>2</sub> decreases in magnitude with incident laser intensity, becoming saturated at <i>n</i><sub>2</sub> = -9.96×10<sup>-16</sup> m<sup>2</sup>/W at high intensities. These results verify the large third-order nonlinear optical response of 2D PdSe<sub>2</sub> as well as its strong potential for high performance nonlinear photonic devices.</p>

scholarly journals Large 3rd Order Optical Kerr Nonlinearity in 2D PdSe2 Dichalcogenide Films for Integrated Nonlinear Photonic Chips

2021 ◽  
Author(s):  
David Moss
Keyword(s):  
High Performance ◽  
Nonlinear Optical ◽  
Laser Intensity ◽  
Nonlinear Refraction ◽  
Kerr Nonlinearity ◽  
Photonic Devices ◽  
Closed Aperture ◽  
Third Order ◽  
Limiting Behaviour ◽  
Incident Laser Intensity

<p>As a novel layered noble metal dichalcogenide material, palladium diselenide (PdSe<sub>2</sub>) has attracted wide interest due to its excellent optical and electronic properties. In this work, a strong third-order nonlinear optical response of 2D PdSe<sub>2</sub> films is reported. We conduct both open-aperture (OA) and closed-aperture (CA) Z-scan measurements with a femtosecond pulsed laser at 800 nm to investigate the nonlinear absorption and nonlinear refraction, respectively. In the OA experiment, we observe optical limiting behaviour originating from large two photo absorption (TPA) in the PdSe<sub>2</sub> film of <i>β =</i> 3.26 ×10<sup>-8</sup> m/W. In the CA experiment, we measure a peak-valley response corresponding to a large and negative Kerr nonlinearity of <i>n</i><sub>2</sub> = -1.33×10<sup>-15</sup> m<sup>2</sup>/W – two orders of magnitude larger than bulk silicon. In addition, the variation of <i>n</i><sub>2</sub> as a function of laser intensity is also characterized, with <i>n</i><sub>2</sub> decreasing in magnitude when increasing incident laser intensity, becoming saturated at <i>n</i><sub>2</sub> = -9.96×10<sup>-16</sup> m<sup>2</sup>/W at high intensities. Our results show that the extraordinary third-order nonlinear optical properties of PdSe<sub>2</sub> have strong potential for high-performance nonlinear photonic devices.</p>

scholarly journals Large 3rd Order Optical Kerr Nonlinearity in 2D PdSe2 Dichalcogenide Films for Integrated Nonlinear Photonic Chips

2021 ◽  
Author(s):  
David Moss
Keyword(s):  
High Performance ◽  
Nonlinear Optical ◽  
Laser Intensity ◽  
Nonlinear Refraction ◽  
Kerr Nonlinearity ◽  
Photonic Devices ◽  
Closed Aperture ◽  
Third Order ◽  
Limiting Behaviour ◽  
Incident Laser Intensity

<p>As a novel layered noble metal dichalcogenide material, palladium diselenide (PdSe<sub>2</sub>) has attracted wide interest due to its excellent optical and electronic properties. In this work, a strong third-order nonlinear optical response of 2D PdSe<sub>2</sub> films is reported. We conduct both open-aperture (OA) and closed-aperture (CA) Z-scan measurements with a femtosecond pulsed laser at 800 nm to investigate the nonlinear absorption and nonlinear refraction, respectively. In the OA experiment, we observe optical limiting behaviour originating from large two photo absorption (TPA) in the PdSe<sub>2</sub> film of <i>β =</i> 3.26 ×10<sup>-8</sup> m/W. In the CA experiment, we measure a peak-valley response corresponding to a large and negative Kerr nonlinearity of <i>n</i><sub>2</sub> = -1.33×10<sup>-15</sup> m<sup>2</sup>/W – two orders of magnitude larger than bulk silicon. In addition, the variation of <i>n</i><sub>2</sub> as a function of laser intensity is also characterized, with <i>n</i><sub>2</sub> decreasing in magnitude when increasing incident laser intensity, becoming saturated at <i>n</i><sub>2</sub> = -9.96×10<sup>-16</sup> m<sup>2</sup>/W at high intensities. Our results show that the extraordinary third-order nonlinear optical properties of PdSe<sub>2</sub> have strong potential for high-performance nonlinear photonic devices.</p>

scholarly journals Ultra-large Optical Kerr Nonlinearity in 2D PdSe2 Dichalcogenide Thin Films for Integrated Nonlinear Photonics

2021 ◽  
Author(s):  
david moss ◽  
jiayang wu
Keyword(s):  
High Performance ◽  
Nonlinear Optical ◽  
Laser Intensity ◽  
Nonlinear Refraction ◽  
Kerr Nonlinearity ◽  
Photonic Devices ◽  
Closed Aperture ◽  
Third Order ◽  
Limiting Behaviour ◽  
Nonlinear Photonics

As a novel layered noble metal dichalcogenide material, palladium diselenide (PdSe2) has attracted wide interest due to its excellent optical and electronic properties. In this work, a strong third-order nonlinear optical response of 2D PdSe2 films is reported. We conduct both open-aperture (OA) and closed-aperture (CA) Z-scan measurements with a femtosecond pulsed laser at 800 nm to investigate the nonlinear absorption and nonlinear refraction, respectively. In the OA experiment, we observe optical limiting behaviour originating from large two photo absorption (TPA) in the PdSe2 film of &beta; = 3.26 &times;10-8 m/W. In the CA experiment, we measure a peak-valley response corresponding to a large and negative Kerr nonlinearity of n2 = -1.33&times;10-15 m2/W &ndash; two orders of magnitude larger than bulk silicon. In addition, the variation of n2 as a function of laser intensity is also characterized, with n2 decreasing in magnitude when increasing incident laser intensity, becoming saturated at n2 = -9.96&times;10-16 m2/W at high intensities. Our results show that the extraordinary third-order nonlinear optical properties of PdSe2 have strong potential for high-performance nonlinear photonic devices. Keywords: 2D materials, PdSe2 films, Z-scan technique, Kerr nonlinearity, nonlinear photonics.

scholarly journals PW 2021 talk 11689-34 PdSe2 MOSS OSF

2021 ◽  
Author(s):  
David Moss
Keyword(s):  
High Performance ◽  
Nonlinear Optical ◽  
Laser Intensity ◽  
Nonlinear Refraction ◽  
Kerr Nonlinearity ◽  
Photonic Devices ◽  
Closed Aperture ◽  
Third Order ◽  
Limiting Behaviour ◽  
Incident Laser Intensity

As a novel layered noble metal dichalcogenide material, palladium diselenide (PdSe2) has attracted wide interest due to its excellent optical and electronic properties. In this work, a strong third-order nonlinear optical response of 2D PdSe2 films is reported. We conduct both open-aperture (OA) and closed-aperture (CA) Z-scan measurements with a femtosecond pulsed laser at 800 nm to investigate the nonlinear absorption and nonlinear refraction, respectively. In the OA experiment, we observe optical limiting behaviour originating from large two photo absorption (TPA) in the PdSe2 film of β = 3.26 ×10-8 m/W. In the CA experiment, we measure a peak-valley response corresponding to a large and negative Kerr nonlinearity of n2 = -1.33×10-15 m2/W – two orders of magnitude larger than bulk silicon. In addition, the variation of n2 as a function of laser intensity is also characterized, with n2 decreasing in magnitude when increasing incident laser intensity, becoming saturated at n2 = -9.96×10-16 m2/W at high intensities. Our results show that the extraordinary third-order nonlinear optical properties of PdSe2 have strong potential for high-performance nonlinear photonic devices.

scholarly journals High Optical Kerr Nonlinearity of PdSe2 Di-chalcogenide 2D Films for Nonlinear Photonic Chips

2021 ◽  
Author(s):  
David Moss ◽  
jiayang wu ◽  
linnan jia
Keyword(s):  
High Performance ◽  
Nonlinear Optical ◽  
Laser Intensity ◽  
Nonlinear Refraction ◽  
Kerr Nonlinearity ◽  
Photonic Devices ◽  
Closed Aperture ◽  
Third Order ◽  
Limiting Behaviour ◽  
Incident Laser Intensity

Abstract As a novel layered noble metal dichalcogenide material, palladium diselenide (PdSe2) has attracted wide interest due to its excellent optical and electronic properties. In this work, a strong third-order nonlinear optical response of 2D PdSe2 films is reported. We conduct both open-aperture (OA) and closed-aperture (CA) Z-scan measurements with a femtosecond pulsed laser at 800 nm to investigate the nonlinear absorption and nonlinear refraction, respectively. In the OA experiment, we observe optical limiting behaviour originating from large two photo absorption (TPA) in the PdSe2 film of β = 3.26 ×10− 8 m/W. In the CA experiment, we measure a peak-valley response corresponding to a large and negative Kerr nonlinearity of n2 = -1.33×10− 15 m2/W – two orders of magnitude larger than bulk silicon. In addition, the variation of n2 as a function of laser intensity is also characterized, with n2 decreasing in magnitude when increasing incident laser intensity, becoming saturated at n2 = -9.96×10− 16 m2/W at high intensities. Our results show that the extraordinary third-order nonlinear optical properties of PdSe2 have strong potential for high-performance nonlinear photonic devices.

SIZE EFFECT OF ENCASED ATOM ON ABSORPTION AND NONLINEAR OPTICAL PROPERTIES OF EMBEDDED METALLOFULLERENES M@C82 (M = Sc, Y, La)

2008 ◽  
Vol 07 (04) ◽  
pp. 737-749 ◽  
Author(s):  
HUI HU ◽  
WEN-DAN CHENG ◽  
SHU-PING HUANG ◽  
ZHI XIE ◽  
HAO ZHANG
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Atomic Radius ◽  
Optical Response ◽  
Nonlinear Optical Properties ◽  
Nonlinear Optical Response ◽  
Photon Absorption ◽  
Absorption Bands ◽  
Third Order ◽  
Linear Absorption

The linear absorption spectra and third-order nonlinear optical properties of M@ C 82 (M = Sc , Y , La ) nanostructural materials, whose configurations were optimized at the unrestricted open shell UB3LYP level, are simulated by the sum-over-states combined with the time-dependent UB3LYP methods. The obtained results show that the electronic absorption bands have redshifts, and the values of third-order nonlinear optical polarizabilities and two-photon absorption cross sections increase for M@ C 82 fullerenes (M = Sc , Y , La ) as the atomic radius of encased metal M increase in the order of Sc → Y → La . It is indicated that the electron-donating ability from the encased M atom to cage C 82 decreases or the electron-accepting ability from C 82 to M atom increases as the atomic radius of M increases, which results in third-order nonlinear optical response enhancement in the order of Sc @ C 82 < Y @ C 82 < La @ C 82. This gives a clue to design the nanostructural materials of encased fullerenes having a large nonlinear optical response.

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