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This paper gives a brief overview on the recent advances on photonic devices based on carbon materials such as: graphene waveguides or photonic devices on paper or plastic substrates in analogy with carbon based electronic devices. The four building block for electronics are the electrons as carrier's information's vectors, the generators, the cables and the transistors. In the same way, photonics or plasmonics will achieve in the future the capability to do same operations done actually in electronics by using photons or plasmons. Following the same steps as in electronics, new technologies were developed in photonics in order to produce photonic integrated circuits (PIC) first on silicon and more recently on plastic or paper substrates. If we analyze the present achievements we can notice that the already equivalent building blocks for photonics on paper substrates are already done: laser on paper substrate (as signal generators), optical and plasmonic waveguides (as information transport cables), optical and plasmonic transistors, photodetectors based on carbon materials etc. In this paper we present by analogy with electronics the recent advancements on paper and carbon based photonics devices. As for electronics, some of the most important advantages of these materials are that they are mechanically flexible, lightweight, cheap and environmentally friendly. • A briefly overview on technologies and materials for photonics on paper substrates. • State of art on perovskite materials for solar cells, LED and lasers. • State of art on plasmonic modulators based on graphene. • New perspectives for the development of future integrated photonic devices. [ABSTRACT FROM AUTHOR]

In this paper we report an experimental demonstration of broadband wavelength self-tuning in Rb5Nd(MoO4)4 laser crystal (RNM) together with the theoretical treatment which explains the system behaviour based on its birefringent properties. The self-frequency tuning in RNM was obtained by inserting an a-cut plate inside the laser resonator close to the Brewster''s angle. At a given position of the crystal plate, when the wavelength of the oscillating mode corresponds to an integral number of full-wave retardation in the plate, the laser operates in the p polarization of the Brewster surface with no losses. The experimental self-frequency tuning of the laser emission along the free spectral range of the RNM crystal (1062.94–1067.84 nm) was obtained by rotating the birefringent gain plate in its own plane. To investigate the tuning characteristics of the spectral filter, we have used the Jones-vector formalism. The calculated wavelength-selective tuning matches the experimental observations. [Copyright &y& Elsevier]

Recently, flexible intelligent wearable devices are in highly demand and it is urgent to increase the flexibility of traditional devices. Organometallic trihalide perovskite materials have become a hot spot in the photoelectric field due to its outstanding optoelectronic properties, which can be crystallized from solutions and vapors. Herein, we demonstrated a simple approach to flexible thin CH 3 NH 3 PbI 3 perovskite films on paper substrates using a dual-source physical vapor deposition method and a brush-coating method. The photodetector devices from the two methods have similar photodetecting and repeatable performances. They well maintained the optoelectronic functionality under bending conditions. Typically, up to 75% of its initial photocurrent was remained after 500 bending cycles, demonstrating good stability against bending deformation. Additionally, a 6 × 6 perovskite photodetector array based on stretchable origami-based techniques were fabricated. It has excellent all-optical acquisition capability and provides potential application in three-dimensional photo sensing. [Display omitted] • Thin perovskite films were deposited on paper substrates using both vapor and solution methods. • The paper-based photodetectors demonstrated good stability against bending deformation, even up to 500 bending cycles. • An origami-based perovskite photodetector array has excellent all-optical acquisition capability. [ABSTRACT FROM AUTHOR]