Goals and Objectives

1. Creation of nanomaterials with record values of optical gain coefficient, as well as with ultrafast optical response and high coefficients of electrical and thermal conductivity.
2. New types of ultracompact nanoresonators supporting high-Q optical resonances and laser generation in the visible range at room temperature.
3. Nano- and microlasers integrated with waveguide systems (including topologically protected ones) adapted for the visible and near-IR ranges.
4. Implementation of ultrafast modulation of nano- and microlasers due to optimized exciton nonlinearity.

Scientific Results

• Samples of nanocrystals and nanostructures have been fabricated from ABX3-type materials (where X is a halogen), as well as from II-VI semiconductors. This includes the synthesis of nanowires and nanocrystal films for subsequent nanostructuring.
• A theoretical model of a nanoresonator based on a single semiconductor nanoparticle, optimized for laser generation at room temperature, has been developed. Q-factor dependencies on the substrate material and morphology have been calculated.
• A theoretical model of a nanoresonator has been developed, consisting of a one-dimensional array of nanoparticles that supports high-Q photonic states for laser generation tasks and is adapted for fabrication from semiconductor nanowires.
• Metasurface designs have been created that simultaneously provide a critical coupling regime at the pump frequency and the laser generation frequency, which will concurrently lower the generation threshold and increase the laser output power.
• Perovskite CsPbCl3 plate-like microcrystals have been synthesized on a gallium phosphide metasurface. Photoluminescence spectra of the samples and the dependence of photoluminescence intensity on the power of single-photon and two-photon optical excitation were obtained.
• A sample of a thin film of CsPbBr3 perovskite nanocrystals on a silicon metasurface has been created. A scanning electron microscopy image of the sample was obtained. The dependence of the sample's photoluminescence intensity on the optical pump wavelength at a constant excitation laser power was established.
• A method for direct femtosecond laser nanostructuring of light-emitting films deposited from a colloidal solution of CdSe/CdZnS core/shell nanoplatelets (NPLs) has been developed. The geometric parameters of the nanostructure (one-dimensional grating) at which NPL photoluminescence enhancement is observed have been determined.
• Samples of perovskite THz radiation detectors were obtained. The dependence of photocurrent on the nature of THz optical pumping of MAPbI3 and MAPbBr3 thin films and single crystals was established during sample gating with pulsed UV laser radiation.
• New hole-transport materials were obtained. Multilayer perovskite optoelectronic devices. AFM images of the morphology of hole-transport material thin films. Results of the device operational stability time test.
• An approach to the formation of carbon dots (CDs) based on shock laser heating was developed. Photoluminescence spectra of CDs. Transmission electron microscopy images of CDs. X-ray photoelectron spectroscopy data of CDs.
• Effective control of laser radiation in a hybrid semiconductor microdisk laser-silicon nanoparticle system via magnetic-dipole (MD) and magnetic-quadrupole (MQ) Mie resonances has been demonstrated. Fabricated microdisk lasers (MDLs) with InAs/InGaAs quantum dots support lasing at λ = 1285 nm on the fundamental magnetic transverse mode 1.46 at room temperature. It was found that nanoparticles shift MDL lasing peaks by less than 1 nm and contribute to a reduction in the lasing threshold by 25% and 14% for MD and MQ nanoparticles, respectively. The directivity of the radiation coupled out of the MDL was determined for both cases.
• A nanophotonic design model was developed consisting of two silicon nanoparallelepipeds coated with a thin layer of phase-change material (Sb2Se3, GeSbTe), demonstrating spectral tuning or a switching effect of a high-Q optical resonance of the quasi-bound states in the continuum (quasi-BIC) type, suitable for observing lasing at its frequency.
• A theoretical approach was developed to optimize the optical heating of a resonator in a nonlinear regime, capable of inducing spectral tuning of laser radiation. A new nanophotonic design based on a super-resonator mode in cylindrical particles of doped silicon, demonstrating efficient light-to-heat conversion.
• A spectrally tunable laser based on a single perovskite CsPbBr3 nanowire interacting with HCl gas has been developed. A model describing the relationship between structure formation and the spectral shift of the laser line in a core-shell type nanocrystal was established.
• It has been shown that a CsPbBr3 film obtained by high-temperature recrystallization under pressure, with an optimized thickness of ≈100 nm, demonstrates modal gain values exceeding 10,000 cm–1, which is a record for bulk perovskite materials. Such films will enable the fabrication of various lithographic photonic structures.
• Room-temperature polariton lasing mediated by exceptional points has been achieved in a nonlocal perovskite metasurface fabricated by nanoimprint lithography. The investigated photonic design could lead to the creation of low-cost continuous-wave and electrically pumped lasers required for industrial applications.
• The exciton-polariton nature of lasing in thin perovskite films and nanowires has been confirmed, followed by the demonstration of an inversion-free Mie-resonant nanolaser with a size of 200 nm. The developed approach is promising for further miniaturization of coherent visible light sources and the implementation of next-generation nanophotonic devices.
• A photonic device consisting of a perovskite microlaser and a TiO2 waveguide was fabricated using inkjet printing. Further development of inkjet printing will enable the production of optical chips with fully printed photonic elements.
• A bifunctional perovskite light-emitting device/photodetector on a silicon substrate has been demonstrated, proving its high technological potential.
• Low-temperature electroluminescence of MPM-type microstructures based on single CsPbBr3 plate-like and wire-like microcrystals was investigated for the first time. A high current density (over 2 kA cm-2) was achieved in the microstructures, which is reliably estimated to be sufficient for observing lasing under electrical excitation.

Education and personnel retraining

• 7 postgraduate students (Khmelevskaya D., Azizov R.R., Anoshkin S.S., Masharin M.A., Markina D.I., Tonkaev P.A., Glebov N.V.) completed internships at Bilkent University (Turkey) during the project implementation period.
• 1 postgraduate student (Marunchenko A.) completed an internship at Lund University (Sweden).
• 1 postgraduate student (Sapozhnikova E.V.) completed an internship at Beijing Institute of Technology (China).

• Daria Igorevna Markina. Candidate of Sciences dissertation: "Spectrally tunable laser generation in lead-halide perovskite filamentary micro- and nanocrystals."
• Kirill Leonidovich Koshelev. PhD dissertation: "Advanced trapping of light in resonant dielectric metastructures for nonlinear optics."
• Yuri Anatolyevich Mezenov. Candidate of Sciences dissertation: "Interaction of laser radiation with flexible metal-organic frameworks: structural modification and nonlinear optical response." Mikhail Alekseevich Masharin. Candidate of Sciences dissertation: "Nonlinear exciton-polariton properties of planar optical resonators based on halide perovskites."
• Pavel Andreevich Tonkaev. Candidate of Sciences dissertation: "Control of the rate and intensity of radiative recombination in structures based on halide perovskites."
• Grigory Andreevich Verkhoglyadov. Candidate of Sciences dissertation: "Study of ionic migration in organic-inorganic perovskites for the implementation of solar cells and LEDs."
• Irina Georgievna Koryakina. Candidate of Sciences dissertation: "Variation of structural and optical properties of optically sensitive nano- and micro-sized crystals using microfluidic technologies."

Cooperation

• Russian Center for Flexible Electronics (RCFE), Troitsk — currently the only pilot plant for the production of flexible TFT matrices based on IGZO technology. Since 2021, active cooperation has been underway in the field of new materials and nanomaterials for photodetector and display matrices.
• JSC SKTB Koltsov — The company specializes in the development and production of information input-output systems with military-grade acceptance (https://koltsov-kb.ru/). Currently, work is underway to find approaches for creating segment LEDs and light-emitting matrices based on new nanomaterials.
• PJSC Gazprom Neft. In 2022, the project "Study of Technologies and Methods for Applying Flexible Electronics" was conducted for the client, focusing on the search for existing solutions and technologies (including additive (3D printing) flexible electronics) as applied to IoT/IIoT and wearable devices. Analysis of the obtained solutions and technologies, search for market offers in the field of creating equipment and devices for flexible electronics for IoT/IIoT and wearable devices, and identification of development scenarios for flexible electronics technologies/devices, including those based on functional nanomaterials, which are the focus of the laboratory's activities.
• Organic and Printed Electronics Technologies LLC. OPET LLC is a subsidiary of JSC Central Research Institute Cyclone, part of the JSC Russian Electronics holding — the largest industry holding, comprising 123 electronic industry enterprises. Negotiations are underway regarding cooperation on new materials for optoelectronics.
• Laser Center — a Russian research and production company that brings together highly qualified specialists with unique experience in designing and manufacturing laser systems and implementing advanced laser technologies in various industries (https://www.newlaser.ru/).