Article
Physics, Applied
Ramachandrarao Yalla, Y. Kojima, Y. Fukumoto, H. Suzuki, O. Ariyada, K. Muhammed Shafi, Kali P. Nayak, Kohzo Hakuta
Summary: In this study, we demonstrate the integration of silicon-vacancy centers in nanodiamonds with an optical nanofiber through experimental methods. The SiV-NDs are grown on a quartz substrate and then transferred onto the surface of the ONF. The fluorescence emission spectrum, photon count rate, and intensity correlations of SiV-NDs are measured and analyzed systematically.
APPLIED PHYSICS LETTERS
(2022)
Article
Polymer Science
Gia Long Ngo, Long Nguyen, Jean-Pierre Hermier, Ngoc Diep Lai
Summary: This study demonstrates a simple method to create on-chip 3D printed polymer waveguide-coupled single-photon emitters based on colloidal quantum dots. By employing a low-one photon absorption technique, a bright QD was successfully created on top of a 3D polymeric crossed-arc waveguide structure. These waveguides were able to conduct both excitation laser and emitted single photons, enabling the characterization of single-photon signals at different outputs. Through comprehensive simulations, the guiding effect of the polymeric waveguide structures was optimized. This method offers a straightforward and cost-effective approach to integrate high-performance single-photon sources with on-chip photonic devices, allowing the development of scalable and versatile quantum photonic circuits for various applications.
Article
Nanoscience & Nanotechnology
Alexander Eich, Tobias C. Spiekermann, Helge Gehring, Lisa Sommer, Julian R. Bankwitz, Philip P. J. Schrinner, Johann A. Preuss, Steffen Michaelis de Vasconcellos, Rudolf Bratschitsch, Wolfram H. P. Pernice, Carsten Schuck
Summary: This study reports on the integration of individual colloidal core-shell quantum dots into a nanophotonic network, allowing for excitation and efficient collection of single photons through separate waveguide channels. The use of an iterative electron beam lithography process enables the positioning of single emitters on a chip with a high yield. This work goes beyond traditional bulk optic methods and provides a pathway for supplying chip-scale quantum networks with single photons from a large number of simultaneously controllable quantum emitters.
Article
Chemistry, Multidisciplinary
Arianne Brooks, Xiao-Liu Chu, Zhe Liu, Ruediger Schott, Arne Ludwig, Andreas D. Wieck, Leonardo Midolo, Peter Lodahl, Nir Rotenberg
Summary: Tailored photonics cavities are used to enhance light-matter interactions, creating a fully coherent quantum interface. An integrated microdisk cavity containing self-assembled quantum dots is reported here, showing coherent routing of photons and clear signatures of coherent scattering by the quantum dots. Control of photon routing between access waveguides is achieved by tuning the quantum dot and resonator detuning or adjusting the excitation beam strength, with a critical photon number less than one photon per lifetime being required.
Article
Nanoscience & Nanotechnology
Hao A. Nguyen, David Sharp, Johannes E. Froch, Yi-Yu Cai, Shenwei Wu, Madison Monahan, Christopher Munley, Arnab Manna, Arka Majumdar, Cherie R. Kagan, Brandi M. Cossairt
Summary: This work demonstrates a method to achieve scalable deterministic positioning of stable single quantum dots (QDs) by exploiting QD size and utilizing template-assisted self-assembly. By encapsulating CdSe/CdS core/shell QDs in silica, their physical size and photostability are increased. The QDs are then precisely positioned into ordered arrays with a high yield. The resulting QDs exhibit antibunching behavior and retain their optical properties over an extended period of time.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Arun Ashokan, Paul Mulvaney
Summary: Solution-phase spectroelectrochemistry was used to study electron injection into colloidal CdSe quantum dots in THF. The results showed reversible optical changes on a time-scale of minutes, with the injection of electrons leading to quenching of photoluminescence. The number of electrons injected into the QDs depended on the electrode potential and QD size, with most injection occurring below the band edge.
CHEMISTRY OF MATERIALS
(2021)
Article
Optics
Lukas Elsinger, Robin Petit, Frederik Van Acker, Natalia K. Zawacka, Ivo Tanghe, Kristiaan Neyts, Christophe Detavernier, Pieter Geiregat, Zeger Hens, Dries Van Thourhout
Summary: Colloidal quantum dots (QDs) are shown to be a promising light source for visible photonics, with integrated LED devices featuring high current density, power density, and low dark current. These devices are expected to find applications in absorption spectroscopy, bio-sensing, and could potentially be used for building electrically pumped lasers at a low cost.
LASER & PHOTONICS REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Cara E. Bradsher, Cayla D. Ontko, Alexandra C. Koziel, James R. McBride, Sandra J. Rosenthal
Summary: This research has found that ferroelectric behavior can be achieved in nanoparticles through ion exchange, with fluorescence retention achieved through CdS shelling before ion exchange, containing defects in the CdS shell rather than the fluorescent CdSe cores. The ferroelectric response remains constant with an increase in the number of CdS monolayers, while fluorescence retention also increases, reaching 99% at 8 monolayers, allowing for the addition of ferroelectric applications to the growing list of quantum dot applications.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Ge Mu, Tianyu Rao, Shuo Zhang, Chong Wen, Menglu Chen, Qun Hao, Xin Tang
Summary: This study reports colloidal quantum-dot upconverters with unprecedented performance, achieving a wider range of operation spectral and higher efficiency through optimization of device structure.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Optics
Jian Zhang, Shaohui Zhang, Yule Zhang, Omar A. Al-Hartomy, Swelm Wageh, Abdullah G. Al-Sehemi, Yabin Hao, Lingfeng Gao, Hao Wang, Han Zhang
Summary: This review provides a comprehensive evaluation of the optoelectronic application levels of semiconductor quantum dots (SQDs), perovskite quantum dots (PQDs), and carbon quantum dots (CDs), as well as a detailed summary of photocatalysis. The article discusses the compositions and optoelectronic properties of the three types of quantum dots, compares their strengths and weaknesses, demonstrates their flourishing development in various optoelectronic applications, and identifies bottlenecks and opportunities for future breakthroughs.
LASER & PHOTONICS REVIEWS
(2023)
Article
Physics, Multidisciplinary
Alan C. Santos, R. Bachelard
Summary: In this Letter, we demonstrate the efficient generation of entanglement between two artificial giant atoms using photon-mediated interactions in a waveguide. By taking advantage of adjustable decay processes and interference processes, the spontaneous sudden birth of entanglement is significantly enhanced with giant atoms. Highly entangled states can also be generated in the steady-state regime by driving the system with a resonant classical field. We propose using the emitted light statistics as a witness of entanglement, with giant photon bunching observed near maximal entanglement regime. These results pave the way for generating quantum correlations and manipulating photon statistics in systems of giant atoms.
PHYSICAL REVIEW LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Matteo Barelli, Cynthia Vidal, Sergio Fiorito, Alina Myslovska, Dimitrie Cielecki, Vincenzo Aglieri, Iwan Moreels, Riccardo Sapienza, Francesco Di Stasio
Summary: This study demonstrates the controlled placement of colloidal semiconductor nanocrystals onto planar surfaces by patterning nanohole arrays in a PMMA thin film and trapping the nanocrystals into the holes. The resulting arrays contain hundreds of single-photon emitters, providing a feasible, fast, and practical method for the fabrication of nanodevices based on colloidal semiconductor nanocrystals, such as single-photon-emitting LEDs.
Article
Quantum Science & Technology
Uesli Alushi, Tomas Ramos, Juan Jose Garcia-Ripoll, Roberto Di Candia, Simone Felicetti
Summary: The article investigates quadratic light-matter interactions in a waveguide QED system. The authors develop a general scattering theory and discuss paradigmatic examples, revealing fundamental differences with conventional waveguide QED systems.
Article
Optics
Matthias J. Grotevent, Sergii Yakunin, Dominik Bachmann, Carolina Romero, Javier R. Vazquez de Aldana, Matteo Madi, Michel Calame, Maksym Kovalenko, Ivan Shorubalko
Summary: This paper demonstrates a Fourier-transform waveguide spectrometer using HgTe-quantum-dot-based photoconductors, with a spectral response up to 2 μm and a spectral resolution of 50 cm(-1). The small size of the spectrometer enables its integration into consumer electronics and space devices.
Article
Optics
Christian Schimpf, Santanu Manna, Saimon F. Covre da Silva, Maximilian Aigner, Armando Rastelli
Summary: Semiconductor quantum dots show promise in generating highly entangled photon pairs for quantum key distribution, with potential applications in satellite-based quantum communication. Operation at temperatures above 20K and ongoing research in electrical control and strain engineering may further enhance their capabilities for real-world use.
ADVANCED PHOTONICS
(2021)
Article
Chemistry, Multidisciplinary
Gaia Ciampalini, Filippo Fabbri, Guido Menichetti, Luca Buoni, Simona Pace, Vaidotas Miseikis, Alessandro Pitanti, Dario Pisignano, Camilla Coletti, Alessandro Tredicucci, Stefano Roddaro
Summary: The conducting properties of graphene-MoS2 heterojunction were investigated, revealing a suppression of transport on the n-side of the transconductance curve due to trapping by sulfur vacancies, which counterintuitively depends on the field effect.
Article
Polymer Science
Michele Monteferrante, Adriano Tiribocchi, Sauro Succi, Dario Pisignano, Marco Lauricella
Summary: This study investigates the free radical polymerization of photocurable polymers using reactive classical molecular dynamics combined with a dynamical approach of the nonequilibrium molecular dynamics (D-NEMD) method. The results provide insights into the physical and topological properties of the polymer and predict its mechanical behavior. This approach offers a novel tool to describe photopolymerization processes and optimize additive manufacturing methods.
Article
Materials Science, Multidisciplinary
Qiuguo Li, Hao Rao, Xinzhou Ma, Haijuan Mei, Zhengting Zhao, Weiping Gong, Andrea Camposeo, Dario Pisignano, Xianguang Yang
Summary: Cu2Te microdisks were successfully prepared using GaTe as Te source, exhibiting a new red emission band in the photoluminescence spectrum and functioning as an efficient optical microcavity for red lasing. These microdisks also serve as ideal substrates for surface enhanced Raman scattering, with high enhancement factor and detection limit to nanomolar level.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Giovanni Morello, Maria Moffa, Martina Montinaro, Annachiara Albanese, Karolis Kazlauskas, Saulius Jursenas, Ausra Tomkeviciene, Juozas Grazulevicius, Andrea Camposeo, Dario Pisignano
Summary: The optical gain of electrospun polystyrene fibers doped with a multi-fragment molecular dye has been studied. Aligned fibers show enhanced performance and the gain spectrum can be tuned by adjusting the dye concentration. On the other hand, randomly oriented fibers exhibit random lasing with a manifold of spectral line narrowing. Increasing the dye content reduces the lasing threshold and allows tuning of the laser emission wavelength. These findings highlight the potential of these fibers for variable-gain, broadband lasing in optical sensing and tunable microlaser devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Francesca D'Elia, Francesco Pisani, Alessandro Tredicucci, Dario Pisignano, Andrea Camposeo
Summary: The article introduces 3D-printed and stretchable magic windows that generate light patterns through refraction and can change shape and light texture through controlled strain. It demonstrates cryptographic magic windows with exemplary light patterns and shows how micro-QR-codes are correctly projected and recognized upon strain gating while remaining cryptic for as-produced devices. The novel, freeform elements with 3D shape and tailored functionalities are relevant for various applications such as illumination design, smart labels, anti-counterfeiting systems, and cryptographic communication.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Nanoscience & Nanotechnology
Israel Greenfeld, Andrea Camposeo, Alberto Portone, Luigi Romano, Maria Allegrini, Francesco Fuso, Dario Pisignano, H. Daniel Wagner
Summary: The molecular orientation in polymer fibers can be enhanced by mixing nanowires, resulting in improved optical properties. Experimental results showed that the molecular orientation was significantly increased near the nanowire boundaries. This method has potential applications in improving the performance of optical devices and sensors.
ACS APPLIED NANO MATERIALS
(2022)
Article
Multidisciplinary Sciences
Dhruv Saxena, Alexis Arnaudon, Oscar Cipolato, Michele Gaio, Alain Quentel, Sophia Yaliraki, Dario Pisignano, Andrea Camposeo, Mauricio Barahona, Riccardo Sapienza
Summary: Recent research has shown that random lasing in complex networks can achieve efficient lasing properties and fast-switching multifunctional light sources by controlling the spatial shape of the pump profile. By solving nonlinear equations within the network graph and selectively lasing the strongest intensity modes, the spectrum of the lasing networks can be effectively programmed. This high sensitivity allows for control of the lasing spectrum through non-uniform pump patterns, leading to the development of optical devices with wide impact for on-chip photonics for communication, sensing, and computation.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Matteo Archimi, Ella Schoolaert, Jana Becelaere, Richard Hoogenboom, Andrea Camposeo, Karen De Clerck, Dario Pisignano
Summary: This study reports on switchable optical gain based on arrays of thermo-responsive poly(2-n-propyl-2-oxazoline) nanofibers. The nanofibers exhibit light amplification and high humidity absorption capability. Waveguiding analysis reveals that the switching mechanism is caused by moisture sorption swelling-induced morphological changes. These responsive light-emitting nanofibers have potential applications in dynamically-controlled lasers, environmentally-switchable optoelectronics, and smart sensors.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Luana Persano, Sujoy Kumar Ghosh, Dario Pisignano
Summary: The realization of intelligent, self-powered components and devices exploiting the piezoelectric effect at large scale would greatly improve resource utilization efficiency, but a profound redesign of materials and architectures is required. Polymers, especially PVDF and its copolymers, have been widely used in this field due to their strong piezoelectric response and flexibility. Electrospinning enables the fabrication of piezoelectric polymer nanofibers with desired properties and is suitable for large-scale production.
ACCOUNTS OF MATERIALS RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Paolo Tentori, Giovanni Signore, Andrea Camposeo, Annalisa Carretta, Gianmarco Ferri, Pasqualantonio Pingue, Stefano Luin, Daniela Pozzi, Enrico Gratton, Fabio Beltram, Giulio Caracciolo, Francesco Cardarelli
Summary: The supramolecular organization of Doxorubicin within the standard liposomal formulation was investigated using phasor approach to fluorescence lifetime imaging. The study revealed the existence and molar fractions of three fluorescent species: crystallized, free, and membrane-bound Doxorubicin within the formulation. This research is important for understanding the distribution of drugs in vivo.
