Article
Nanoscience & Nanotechnology
Vladimir Fedorov, Maxim Vinnichenko, Ratmir Ustimenko, Demid Kirilenko, Evgeny Pirogov, Alexander Pavlov, Roman Polozkov, Vladislav Sharov, Andrey Kaveev, Dmitry Miniv, Liliia Dvoretckaia, Dmitry Firsov, Alexey Mozharov, Ivan Mukhin
Summary: Crystal phase and strain engineering in epitaxial nanowire heterostructures can provide tunable functionality in nanoscale light emitters and photodetectors. In this study, the inhomogeneity of the InP shell thickness in InAs core-shell nanowires was found to affect the recombination mechanisms, as well as the emission energy. Temperature-dependent photoluminescence studies showed non-trivial temperature dependence, with radiative recombination mainly occurring in the regions with a thicker InP shell and a tensile strain in the InAs core.
ACS APPLIED NANO MATERIALS
(2023)
Article
Quantum Science & Technology
Massimo Gurioli
Summary: This study investigates the spectral and spatial dependence of the resonant Lamb shift of an exciton inside a photonic vacuum field landscape, which can predict an optical dipole potential generated via virtual photons quantum fluctuations. The trapping potential can be utilized for exciton self-positioning at the nanoscale in electric field hotspots, aiming to observe quantum electrodynamics effects. By decomposing the electromagnetic Green tensor in terms of quasi-normal modes, the resonant part of the Lamb shift is expressed as Fano profile interconnected with the Purcell enhancement of exciton radiative lifetime, providing insights on tailoring the depth of the vacuum photonic potential in various scenarios.
ADVANCED QUANTUM TECHNOLOGIES
(2021)
Article
Optics
Marcus Albrechtsen, Babak Vosoughi Lahijani, Soren Stobbe
Summary: We present a theoretical study on dielectric bowtie cavities and identify two distinct confinement regimes. Distinguishing between these regimes is crucial for future research on nanocavities and enables strongly enhanced light-matter interaction over large bandwidths.
Article
Nanoscience & Nanotechnology
Ting-Yuan Chang, Hyunseok Kim, William A. Hubbard, Khalifa M. Azizur-Rahman, Jung Jin Ju, Je-Hyung Kim, Wook-Jae Lee, Diana Huffaker
Summary: This article reports on the monolithic integration of InAsP quantum dots embedded in InP nanowires on silicon, showing potential for building next-generation quantum light sources.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Optics
Yunyun Ding, Wolfgang Rehbein, Martin Moehrle, Marlene Zander, Martin Schell, Kevin Kolpatzeck, Jan C. Balzer
Summary: High-performance buried heterostructure (BH) C-band InAs/InP quantum dot (QD) and L-band InGaAsP/InP quantum well (QW) two-section passively mode-locked lasers (MLLs) were investigated. Short pulse trains with sub-ps pulse widths were achieved by compensating dispersion, demonstrating the potential for photonic applications in optical communications.
Article
Engineering, Electrical & Electronic
Guocheng Liu, Philip J. Poole, Zhenguo Lu, Jiaren Liu, Chun-Ying Song, Youxin Mao, Pedro Barrios
Summary: The mode-locking and noise characteristics of InP/InAs quantum dash (QDash) and quantum dot (QDot) multi-wavelength lasers operating at the C-band were compared. QDash lasers exhibited improved repetition frequency stability with lower threshold current and cavity loss. QDot lasers showed higher quality repetition frequency tunability with higher internal quantum efficiency, lower relative intensity noise (RIN), and optical linewidth. Additionally, both QDash and QDot lasers exhibited clean constellation diagrams at 32 GBaud 16QAM base-band signal, with QDot lasers outperforming QDashes in terms of bit-error ratio (BER) performance, highlighting their suitability as low-cost optical sources for large-scale networks.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
F. Zaouali, A. Bouazra, M. Said
Summary: Theoretical study on the optical properties of the InAs/InP quantum wire with a lens cross-section revealed that the oscillator strength increases with height H, the total absorption coefficient reaches a maximum value, and the resonant peaks shift towards lower energies as H increases.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Yongqian Zhao, Mengfei Xue, D. J. O. Goransson, M. T. Borgstrom, H. Q. Xu, Jianing Chen
Summary: Using Raman spectroscopy, we investigated the strain state and phonon modes of wurtzite InP-InAs core-shell nanowire, identifying characteristic modes under different polarization excitation configurations and revealing resonance effects between materials. These findings deepen the understanding of strain in wurtzite-phase core-shell nanowires and provide significant guidance for controlling optical and electrical properties.
Article
Physics, Applied
Hui Jia, Xuezhe Yu, Taojie Zhou, Calum Dear, Jiajing Yuan, Mingchu Tang, Zhao Yan, Bogdan-Petrin Ratiu, Qiang Li, Alwyn Seeds, Huiyun Liu, Siming Chen
Summary: In this paper, the authors report the results of long-wavelength microdisk lasers based on five stacks of self-assembled InAs/InAlGaAs quantum dots. These quantum dots were grown on an InP (001) substrate using solid-source molecular beam epitaxy. The 8.4-micron diameter quantum dot microdisk laser operated at room temperature under pulsed optically pumping conditions. The experimental results achieved multi-wavelength lasing emissions at around 1.6 microns with a low threshold of 30 μW and a quality factor of approximately 1336. The demonstrated long-wavelength lasers with low threshold and compact size have potential applications in integrated gas detection and highly localized label-free biological and biochemical sensing.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Samuele Cornia, Valeria Demontis, Valentina Zannier, Lucia Sorba, Alberto Ghirri, Francesco Rossella, Marco Affronte
Summary: Novel approaches exploiting the interaction between microwaves and quantum devices are being developed for efficient microwave detection. In this study, InAs/InP nanowire double quantum dot-based devices are used as nanoscale detectors to measure the local field without calibration. The detector performance is evaluated, and it is shown that these devices allow direct assessment of the microwave field with high sensitivity and spatial resolution, potentially advancing the development of high-performance microwave circuitries.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Xiyuan Lu, Feng Zhou, Yi Sun, Ashish Chanana, Mingkang Wang, Andrew McClung, Vladimir A. A. Aksyuk, Marcelo Davanco, Kartik Srinivasan
Summary: Micro-/nanocavities with high quality factor (Q) and small mode volume (V) have been used to enhance light-matter interactions in cavity quantum electrodynamics (cQED). Whispering gallery mode (WGM) geometries, such as microdisks and microrings, support high-Q but have limited V. One-dimensional or two-dimensional photonic crystal defect geometries provide stronger modal confinement and smaller V, but require more precise design and dimensional control.
Article
Nanoscience & Nanotechnology
Sanghyeok Park, Dongha Kim, Min-Kyo Seo
Summary: Interlayer excitons in van der Waals heterostructures of two-dimensional transition-metal dichalcogenides have shown potential applications in quantum many-body effects, long-range interactions, and optovalleytronic devices. However, further development is needed to improve the long-lived character of interlayer excitons. The proposed plasmonic photonic crystal mirror can significantly increase the radiative lifetime of interlayer excitons and offer new possibilities for realizing long-lived interlayer exciton-based nanodevices.
Article
Nanoscience & Nanotechnology
Pawel Holewa, Shima Kadkhodazadeh, Michal Gawelczyk, Pawel Baluta, Anna Musial, Vladimir G. Dubrovskii, Marcin Syperek, Elizaveta Semenova
Summary: The development of quantum communication technology requires quantum emitters that can generate single photons and entangled photon pairs. This study successfully synthesized low surface density InAs x P1-x quantum dots with symmetric profiles using droplet epitaxy, which can contribute to the fabrication of versatile quantum emitters.
Article
Optics
Pawel Mrowinski, Pawel Holewa, Aurimas Sakanas, Grzegorz Sek, Elizaveta Semenova, Marcin Syperek
Summary: We conducted comprehensive numerical studies on a hybrid III-V/Si-based waveguide system, which enables efficient light coupling between an integrated III-V quantum dot emitter and an on-chip quantum photonic integrated circuit on a silicon substrate. Our proposed platform consists of a hybrid InP/Si waveguide and an InP-embedded InAs quantum dot, operating at a wavelength of 1550 nm in the telecom C-band. The numerical studies revealed high optical field transfer efficiency between the InP/Si and Si waveguides, directional dipole emission to the hybrid InP/Si waveguide, and off-chip outcoupling efficiency along the Si waveguide.
Article
Nanoscience & Nanotechnology
Elisa M. Sala, Max Godsland, Young In Na, Aristotelis Trapalis, Jon Heffernan
Summary: InAs quantum dots were successfully fabricated on an In0.53Ga0.47As interlayer and embedded in an InP(100) matrix using droplet epitaxy. The presence of the In0.53Ga0.47As interlayer prevented the formation of non-stoichiometric 2D layers and affected the size of the resulting quantum dots.
Article
Chemistry, Physical
Ruben Vazquez-Cardenas, Jesus Rodriguez-Romero, Carlos Echeverria-Arrondo, Jesus Sanchez-Diaz, Vladimir S. Chirvony, Juan P. Martinez-Pastor, Pedro Diaz-Leyva, Juan Reyes-Gomez, Isaac Zarazua, Ivan Mora-Sero
Summary: This study reports a method for fabricating quasi-2D PVK thin films, which effectively reduces the formation of undesired higher n-phases and 3D PVKs without the use of additional reagents or fabrication steps.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Isaac Suarez, Vladimir S. Chirvony, Jesus Sanchez-Diaz, Rafael S. Sanchez, Ivan Mora-Sero, Juan P. Martinez-Pastor
Summary: In this study, high-quality lead-free perovskite thin films were successfully incorporated into a flexible PET substrate to demonstrate amplified spontaneous emission (ASE) and lasing. The optimized design of the structure resulted in extremely low ASE/lasing threshold and strong polarization anisotropy for the outcoupled light.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Eduardo Aznar-Gadea, Pedro J. Rodriguez-Canto, Sandra Albert Sanchez, Juan P. Martinez-Pastor, Rafael Abargues
Summary: This study reports a luminescent chemosensor based on CdSe quantum dots embedded in polycaprolactone, which exhibits a fast response time and high sensitivity for the detection and identification of explosive taggants.
ACS APPLIED NANO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Maria Ramos, Francisco Marques-Moros, Dorye L. Esteras, Samuel Manas-Valero, Eudomar Henr iquez-Guerra, Marcos Gadea Jose, Jose J. Baldovi, Josep Canet-Ferrer, Eugenio Coronado, M. Reyes Calvo
Summary: This study investigates the photoluminescence properties of a stacked structure of single-layer MoS2 and van der Waals FePS3. The results demonstrate the outstanding performance of this heterostructure in terms of energy band alignment and charge transfer, providing potential for rational design of van der Waals heterostructures with advanced optoelectronic properties.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Rodolfo Canet-Albiach, Marie Krecmarova, Jose Bosch Bailach, Andres F. Gualdron-Reyes, Jesus Rodriguez-Romero, Setatira Gorji, Hamid Pashaei-Adl, Ivan Mora-Sero, Juan P. Martinez Pastor, Juan Francisco Sanchez-Royo, Guillermo Munoz-Matutano
Summary: Organic-inorganic layered perovskites are promising 2D van der Waals materials. We propose a mechanical approach to reduce spectral diffusion, revealing the exciton fine structure. Our work provides a low-cost solution to access important excitonic state information.
Article
Chemistry, Multidisciplinary
Marcel S. Claro, Juan P. Martinez-Pastor, Alejandro Molina-Sanchez, Khalil El Hajraoui, Justyna Grzonka, Hamid Pashaei Adl, David Fuertes Marron, Paulo J. Ferreira, Oleksandr Bondarchuk, Sascha Sadewasser
Summary: Bandgap engineering and quantum confinement in semiconductor heterostructures allow for fine-tuning of material response to electromagnetic fields and light. However, forming semiconductor heterostructures on lattice-mismatched substrates has been a challenge. This study demonstrates the successful van der Waals epitaxy of 2D GaSe and InSe heterostructures on silicon and sapphire substrates with different lattice parameters. The GaSe/InSe heteroepitaxy enables the growth of quantum wells and superlattices with photoluminescence and absorption related to interband transitions.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Vladimir S. Chirvony, Isaac Suarez, Jesus Sanchez-Diaz, Rafael S. Sanchez, Jesus Rodriguez-Romero, Ivan Mora-Sero, Juan P. Martinez-Pastor
Summary: An unusual spectrally reproducible near-IR random lasing is observed in chemically stabilized polycrystalline films of formamidinium tin triiodide perovskite. The high Q-factor and low ASE threshold of the lasing are achieved. The spectral stability is explained by the large inhomogeneous broadening of the emitting centers in Sn-based perovskites.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Isaac Suarez, Juan P. Martinez-Pastor, Marek F. Oszajca, Norman A. Luchinger, Brian Graves, Said Agouram, Carles Milian, Albert Ferrando
Summary: This manuscript demonstrates the extraordinary self-defocusing response of lead-free Cs2SnI6 nanocrystals, which can be tuned by controlling the intensity, concentration, and propagation distance.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Hamid Pashaei Adl, Setatira Gorji, Andres F. Gualdron-Reyes, Ivan Mora-Sero, Isaac Suarez, Juan P. Martinez-Pastor
Summary: We demonstrate a hybrid dielectric-plasmonic multifunctional structure for controlling the emission properties of CsPbI3 perovskite nanocrystals. The structure consists of a hyperbolic metamaterial and TiO2 spherical MIE nanoresonators. The incorporation of nanoresonators counteracts the reduction in emission intensity caused by the presence of metal in the metamaterial and leads to preferential emission in the normal direction to the metamaterial plane.
Article
Materials Science, Multidisciplinary
Hamid Pashaei Adl, Setatira Gorji, Guillermo Munoz-Matutano, Andres F. Gualdron-Reyes, Isaac Suarez, Vladimir S. Chirvony, Ivan Mora-Sero, Juan P. Martinez-Pastor
Summary: This study focuses on the Superradiance (SR) emission observed in superlattices (SLs) formed by CsPbBr3 and CsPbBrI2 nanocrystals (NCs). Micro-Photoluminescence spectra and transients of CsPbBr3 SLs are measured to extract information about the SR states and uncoupled domains of NCs. The study finds that CsPbBr3 SLs with homogeneous SR lines have shorter lifetimes compared to thin films made with the same NCs, and the thermal decoherence of the SR exciton state is evident above a certain temperature due to coupling with phonons.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Physics, Applied
J. M. Llorens, B. Alen
Summary: We propose a photonic structure that can enhance the brightness of an embedded single-photon emitter by tailoring Mie, Tamm, and surface-plasmon optical modes. Unlike most proposals, the structure is designed for excitation and collection through the substrate side. The front surface can be used for arranging metal contacts, serving as both electrical gates and optical mirrors. The specific design is optimized for InGaAs quantum dots on GaAs, achieving an out-coupled single-photon rate exceeding 3 GHz within a cone of narrow numerical aperture (NA = 0.17). Fabrication tolerances are also discussed.
PHYSICAL REVIEW APPLIED
(2023)
Article
Chemistry, Multidisciplinary
Francisco Marques-Moros, Carla Boix-Constant, Samuel Manas-Valero, Josep Canet-Ferrer, Eugenio Coronado
Summary: We conducted a comprehensive optical characterization of the van der Waals semiconductor metamagnet CrSBr using temperature- and magnetic-field-dependent photoluminescence. We observed a characteristic peak that disappeared when switching the ferromagnetic layers and exhibited a different temperature dependence from excitonic peaks. This peak's contribution to photoluminescence was enhanced around 30-40 K, coinciding with the hidden order magnetic transition temperature. Our findings reveal the connection between optical and magnetic properties through the ionization of magnetic donor vacancies and demonstrate the potential of designing 2D heterostructures with magnetic and excitonic properties.
Article
Chemistry, Physical
Waqas Zia, Clara A. Aranda, Jan Pospisil, Alexander Kovalenko, Monika Rai, Cristina Momblona, Setatira Gorji, Guillermo Munoz-Matutano, Michael Saliba
Summary: This paper presents a detailed investigation of seed and nucleation-assisted growth methods for the inverse temperature crystallization of methyl-ammonium lead bromide single crystals. The study demonstrates that low-temperature seed-assisted growth significantly improves the optical and electrical responses compared to nucleation-assisted growth. The study also highlights that the improved crystallization method has a positive impact on the optical and crystalline properties of the material, as well as the photodetector properties of the crystal.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Alejandro Vidal, Sergio Molina-Prados, Ana Cros, Nuria Garro, Manuel Perez-Martinez, Raquel Alvaro, Gadea Mata, Diego Megias, Pablo A. Postigo
Summary: An easy and low-cost method for fabricating monometallic Au nanoislands for plasmonic enhanced spectroscopy is presented. This method involves direct thermal evaporation of Au on glass substrates, followed by a thin layer of silicon dioxide. The fabricated nanoislands exhibit strong plasmon resonances in the visible range, and have been shown to enhance fluorescence and Raman scattering measurements.
