Abstract
Direct laser writing has been proved to be capable for effective modulation of optical and electrical properties of various nanomaterials. In this work, we designed a flexible direct laser writing approach to engineer photoluminescence (PL) properties of monolayer MoS2 and present its potential application in optical recording. PL spectra evolution of monolayer MoS2 under continuous-wave laser writing has been explored, where its PL energy can be precisely controlled by changing the writing time. This feature enables a multimode optical recording with spectral contrast in monolayer limit materials for high-capacity data storage technologies. Here, we constructed a proof-of-principle multimode optical recording on monolayer MoS2 based on the PL wavelength division multiplexing scheme and discussed the relevant challenges for practical applications. Our flexible approach with a mask-free feature and high spatial resolution is promising for applications in two-dimensional material-based information storage and optoelectronic devices.
Highlights
Direct laser writing has been used widely for producing micrometer-sized features and three-dimensional (3D) microdevices due to its advantages of nanometer spatial resolution, maskless lithography, and 3D prototyping capability.1,2 By utilizing this technique, the optical and electrical properties of many nanomaterials, including carbon nanotubes,3 gold nanorods,4,5 and graphene oxide,6,7 have been modified effectively and controllably.7,8 This kind of flexible tunability provides a promising route in developing high-capacity optical data storage
We presented a proof-of-principle spectral encoding optical storage based on the wavelength division multiplexing (WDM) scheme
By investigating dozens of monolayer MoS2 prepared by chemical vapor deposition (CVD) methods, we found that the PL intensity and spectra of several samples can be well controlled by changing the writing time, as shown in Figs. 1(a) and 1(b), respectively
Summary
Direct laser writing has been used widely for producing micrometer-sized features and three-dimensional (3D) microdevices due to its advantages of nanometer spatial resolution, maskless lithography, and 3D prototyping capability.1,2 By utilizing this technique, the optical and electrical properties of many nanomaterials, including carbon nanotubes,3 gold nanorods,4,5 and graphene oxide,6,7 have been modified effectively and controllably.7,8 This kind of flexible tunability provides a promising route in developing high-capacity optical data storage. Scitation.org/journal/adv have been constructed and applied to fabricate high-performance optoelectronic devices, the utilization of the unique optical features of monolayer MoS2 by direct laser writing, especially its potential applications in multimode optical recording, has not been explored.
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