Transfer of an exfoliated monolayer graphene flake onto an optical fiber end face for erbium-doped fiber laser mode-locking

Rosa, Henrique G.; Gomes, José Carlos Viana; Souza, E. A. Thoroh de

doi:10.1088/2053-1583/2/3/031001

Cited by 23 publications

(7 citation statements)

References 18 publications

(22 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our method is based on a wet transfer of the patterned resist lm with polyvinyl alcohol (PVA) as used similarly for transferring exfoliated 2D materials. 21,22 Floating transfer in itself is not a new concept but is used in various applications based on different protocols, e.g. the transfer of photonic crystals 23,24 and anodic aluminum oxide templates.…”

Section: Introductionmentioning

confidence: 99%

Patterning 2D materials for devices by mild lithography

Weinhold

Klar

2021

RSC Adv.

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Patterning 2D materials for devices by mild lithography

Weinhold

Klar

2021

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…As a result, most research has only demonstrated functional 2D materials transferred on curved surface. 7,13,14 Without device configuration, controlling, monitoring, and reading signals of those 2D functional layers are difficult. It is thus of great importance to devise a technique that can integrate 2D materials device assemblies, for advanced functionalities on surfaces.…”

mentioning

confidence: 99%

“…wrapped graphene onto a stripped optical fiber to modulate optical signals with optical source . In addition, transferred graphene on an optical fiber can be used for passive mode-locking. , Combining those features of 2D materials and their devices, the feasible potential of integrating functional 2D optoelectronic devices onto various nonflat surfaces thus comes into existence.…”

mentioning

confidence: 99%

“…Beyond common Si/SiO 2 wafer surfaces, surfaces attracting a great amount of scientific interests can often be nonflat, which are not lithography friendly for device fabrication. As a result, most research has only demonstrated functional 2D materials transferred on curved surface. ,, Without device configuration, controlling, monitoring, and reading signals of those 2D functional layers are difficult. It is thus of great importance to devise a technique that can integrate 2D materials device assemblies, for advanced functionalities on surfaces.…”

mentioning

confidence: 99%

“…It is thus of great importance to devise a technique that can integrate 2D materials device assemblies, for advanced functionalities on surfaces. Compared with the mature technique of transferring 2D materials, ,− transferring complete device assemblies, however, exerts unparalleled difficulties. The whole device assembly needs to be taken off, transferred by a carrier and released onto the target.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Near-Field Coupled Integrable Two-Dimensional InSe Photosensor on Optical Fiber

Jin

Zhang

et al. 2018

ACS Nano

View full text Add to dashboard Cite

van der Waals layered materials possess innate advantages as integrable sensors, due to their thinness, flexibility, and sensitivity. They can be seamlessly integrated onto surfaces with different geometries where detection for near-field signal is desired. In this study, we develop a device transfer technique to integrate device assemblies based on 2D materials onto an arbitrary smooth surface. Such technique utilizes a sacrificial polymer underlayer and achieves clean and nondestructive full device transfer. For demonstration, we transferred a complete 2D multilayer InSe photodetector device onto a stripped optical fiber. Due to the extreme vicinity of the 2D photodetector with the fiber core, the device can effectively couple with the evanescent field and accurately detect information transmitted inside the optical fiber. In addition, these super thin flexible device assemblies can be integrated onto the fibers themselves to non-invasively monitor the optical fiber performance. The demonstration of optically coupled, conformal 2D devices on substrates of different form factors can enable a variety of near-field optical and sensing applications.

show abstract

A Comparison for Saturable Absorbers: Carbon Nanotube Versus Graphene

Lau

Liu

Qiu

2022

Advanced Photonics Research

View full text Add to dashboard Cite

Saturable absorption is a nonlinear optical phenomenon that is characterized by the reduced optical loss at high light intensity. At low light intensity, the saturable absorber (SA) absorbs light and results in an optical loss. When the light intensity is increased, the available energy states become depleted, leading to a reduction in absorption. For semiconductors, the saturated optical absorption under strong excitation is in conjunction with the Pauli expulsion of occupying carriers at the edge of the filled conduction band thus allowing photons to penetrate through the material without further absorption. [1] When incorporated into a mode-locked laser cavity, the saturable absorption process begins from the inherent noise fluctuations of a laser cavity. A dominant noise spike with the highest intensity will saturate the absorber and decreases the absorbance loss such as the pedestal peaks. [2] Next, this noise spike is amplified in subsequent round trips until a stable pulse train is eventually formed. This favors the generation of ultrafast laser pulses over continuous-wave laser operation. During the formation of ultrafast laser pulses, the SA is operated either as slow or fast SA. The main difference between these two SA configurations is their relaxation time. The relaxation time of a slow SA is longer than its pulse duration measured from the mode-locked laser. The long time constant results in reduced saturation intensity due to slow recovery of absorption. [3] Therefore, the slow SA self-starts the modelocked laser at a lower power threshold. In contrast, the relaxation time of fast SA is shorter than its pulse duration measured from the mode-locked laser. Owing to the fast relaxation time, the electrons in the conduction band will return to the valence band at a period shorter than the pulse duration. This constitutes the higher power threshold to self-start the mode-locked laser.Despite the difficulty to self-start the mode-locking, the fast SA is responsible for the stabilization of the laser. The fast SA has ultrafast carrier relaxation time for the SA to recover from bleaching with minimal time. [4] Besides stabilization, ultrafast relaxation time is also crucial to shortening the pulse duration of the mode-locked laser. [5] Before the advent of ultrashort pulse with relaxation time ranging from a few ps to a few hundred fs, semiconductor saturable absorber mirror (SESAM) was demonstrated with a complex post-fabrication process. For instance, ion implantation is needed to reduce its relaxation time to ps time scale. This encourages the discovery of a material with sub-picosecond recovery time, such as carbon nanotube (CNT) [6] and graphene. [7] Both CNT and graphene have ultrafast and slow recovery from saturation. In a femtosecond laser, the CNT will typically act as a slow SA due to its recovery time of few ps, whereas the graphene will typically act as a fast SA due to its

show abstract

Transfer of an exfoliated monolayer graphene flake onto an optical fiber end face for erbium-doped fiber laser mode-locking

Cited by 23 publications

References 18 publications

Patterning 2D materials for devices by mild lithography

Patterning 2D materials for devices by mild lithography

Near-Field Coupled Integrable Two-Dimensional InSe Photosensor on Optical Fiber

A Comparison for Saturable Absorbers: Carbon Nanotube Versus Graphene

Contact Info

Product

Resources

About