Abstract
The successful exfoliation of monolayer graphene has triggered eruptive research and development efforts of two-dimensional (2D) materials in the formats of monolayers, bilayers, few layers, and heterostructures. With properties distinct from their bulk counterparts, 2D materials enable tightly confined light and phonons, unprecedentedly controlled electrons, spins, and excitons, which evoke fundamental new science and offer new paradigm technologies for highly integrated multifunctional optoelectronic devices. In this editorial, we briefly review the interesting new advances in the past few years and highlight the remaining challenges and identified opportunities. As a dedicated research journal serving the photonics community, APL Photonics eagerly looks forward to seeing more exciting findings in the 2D material photonics area to be disseminated in such an excellent platform over the coming years.
Highlights
The discovery of graphene1 has spawned enthusiastic research into other atomically thin materials.2 To date, many different materials have been successfully exfoliated which significantly expand the available options to achieve the desired optoelectronic properties and extend the wavelengths of interest
As a dedicated research journal serving the photonics community, APL Photonics eagerly looks forward to seeing more exciting findings in the 2D material photonics area to be disseminated in such an excellent platform over the coming years
There is growing interest in layered compounds, for example, inorganic perovskites.4. These 2D materials have offered extraordinary electronic, chemical, optical, magnetic, mechanical, and thermal properties,2 which give birth to many new burgeoning research fields based on 2D materials, including material simulation and design, synthesis and manufacturing, characterization, and device design and fabrication
Summary
The discovery of graphene has spawned enthusiastic research into other atomically thin materials. To date, many different materials have been successfully exfoliated which significantly expand the available options to achieve the desired optoelectronic properties and extend the wavelengths of interest. The advances in material species exploration allow the realization of multiple functions by stacking layers of different 2D materials into heterostructures to form integrated optoelectronic devices holding great promise to succeed the legacy of silicon It has been almost 15 years since it was discovered, graphene and its family of materials, such as graphene oxide, are still garnering significant research interest. Single layer molybdenum diselenide from the family of TMDCs can have unexpected high levels of reflectance, which can be made into mirrors that can reflect a considerable proportion of the incident light—up to 85% at the exciton resonance frequency of the material.18 This finding could have technological implications for nanophotonics, optoelectronics, and quantum optics. Bilayers of PtSe2 combined with defect modulation possess strong light absorption in the mid-infrared region, leading to a photoconductive detector operating in a broadband due to a variable bandgap. An infrared photodetector based on 2D Bi2O2Se crystal has demonstrated both high sensitivity and ultrafast photoresponse at the room temperature. Recently, the demonstration of patterned graphen metamaterials may provide new solutions for IR detectors.
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