In Situ Third‐Order Non‐linear Responses During Laser Reduction of Graphene Oxide Thin Films Towards On‐Chip Non‐linear Photonic Devices

Zheng, Xiaorui; Jia, Baohua; Chen, Xi; Gu, Miṅ

doi:10.1002/adma.201304681

Cited by 216 publications

(243 citation statements)

References 29 publications

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“…Owing to its ease of preparation as well as the tunability of its material properties, graphene oxide (GO) has become a highly promising member of the 2D family . Recently, a broadband GO–polymer waveguide polarizer with a high PDL of ≈40 dB was demonstrated, where the GO films were introduced onto an SU8 polymer waveguide using drop‐casting methods.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide Waveguide and Micro‐Ring Resonator Polarizers

Yang

et al. 2019

Laser & Photonics Reviews

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177

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Integrated waveguide polarizers and polarization‐selective micro‐ring resonators (MRRs) incorporated with graphene oxide (GO) films are experimentally demonstrated. CMOS‐compatible doped silica waveguides and MRRs with both uniformly coated and patterned GO films are fabricated based on a large‐area, transfer‐free, layer‐by‐layer GO coating method that yields precise control of the film thickness. Photolithography and lift‐off processes are used to achieve photolithographic patterning of GO films with precise control of the placement and coating length. Detailed measurements are performed to characterize the performance of the devices versus GO film thickness and coating length as a function of polarization, wavelength and power. A high polarization dependent loss of ≈53.8 dB is achieved for the waveguide coated with 2‐mm‐long patterned GO films. It is found that intrinsic film material loss anisotropy dominates the performance for less than 20 layers whereas polarization‐dependent mode overlap dominates for thicker layers. For the MRRs, the GO coating length is reduced to 50 µm, yielding a ≈8.3 dB polarization extinction ratio between transverse electric (TE) and transverse magnetic (TM) resonances. These results offer interesting physical insights and trends of the layered GO films and demonstrate the effectiveness of introducing GO films into photonic‐integrated devices to realize high‐performance polarization selective components.

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Section: Introductionmentioning

confidence: 99%

Graphene Oxide Waveguide and Micro‐Ring Resonator Polarizers

Yang

et al. 2019

Laser & Photonics Reviews

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177

297

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“…[14][15][16][17] One of the most preeminent features of GO is that its physical and chemical properties can be manipulated via the reduction reactions to change the type and density of oxygen containing groups, which makes its optical nonlinearity tunable for different devices. [18][19][20] Meanwhile, the graphene based material is robust and chemically stable, which is crucial for the massive scale production. [17][18][19][20] SiO 2 micro-beads play another important role in the system.…”

Section: Introductionmentioning

confidence: 99%

“…[18][19][20] Meanwhile, the graphene based material is robust and chemically stable, which is crucial for the massive scale production. [17][18][19][20] SiO 2 micro-beads play another important role in the system. Many optical nonlinear materials have greater nonlinearity at a higher light intensity.…”

Section: Introductionmentioning

confidence: 99%

A frozen matrix hybrid optical nonlinear system enhanced by a particle lens

Chen

Zheng

et al. 2015

Nanoscale

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In this work, a Graphene Oxide (GO) nano-sheet and SiO2 micro-bead hybrid system based on a frozen matrix was investigated for its enhanced optical nonlinear performance. A frozen matrix is a novel approach that hosts the optical nonlinear nano-particles, which combines the strengths from both liquid and solid phase systems for high performance photonic applications. SiO2 micro-beads were used to induce a local field enhancement effect that improved the optical nonlinearity of GO nano-sheets. The nonlinear performance of the hybrid system is several orders higher than the existing GO nano-sheet liquid dispersion. In addition, this frozen matrix and the local field enhancement effect are two facile and versatile methods that can be applied to many types of nano-particle dispersions.

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“…There is an intensive effort on the use of lasers of different energies, from the infrared to the ultraviolet, and different time scales, from continuous to femto-second lasers [19] to pattern graphene and graphene oxide materials [20,21,22]. Lasers are being used either to induce the partial reduction of graphene oxide films providing paths of increased conductivity and particularly well suited for applications in batteries and supercapacitors [2,3], or to eliminate graphene [23,24].…”

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confidence: 99%