< Back Riccardo Pallucchi PhD Student Curriculum Vitae Publications since 2023 PhD student in Physics at the Nanospectroscopy group at the Physics department of the Sapienza University of Rome, Italy. Currently working on strain characterization and localized quantum dot fabrication in N doped GaAs nanowires. 2023 Research Grant at Institute for Complex Systems (ISC) - CNR, Rome 2020-2023 Master of Science (MSc) in Condensed Matter Physics at Sapienza University, Rome 2015-2019 Bachelor of Science (BSc) in Physics at Sapienza University, Rome Back to Top Sapienza University of Rome, Physics Department riccardo.pallucchi@uniroma1.it Office: n° 349, third floor, Marconi building, Physics Department

< Back Paolo De Vincenzi PhD Student Curriculum Vitae Publications since 2023 PhD student in the Nanospectroscopy group at the Physics department of the Sapienza University of Rome, Italy. Currently working on creating QDs in GaAsN, GaAsP and InAsP NWs and tune their emission. 2021-2023 Master of Science (MSc) in Condensed Matter Physics at Sapienza University, Rome 2017-2021 Bachelor of Science (BSc) in Physics at Sapienza University, Rome Back to Top Sapienza University of Rome, Physics Department paolo.devincenzi@uniroma1.it Office: n° 312, third floor, Marconi building, Physics Department

< Back Francesca Santangeli PhD Student Curriculum Vitae Publications since 2022 PhD student in the Nanospectroscopy group at the Physics department of the Sapienza University of Rome, Italy. Currently working on tuning the optoelectronic and vibrational properties of InN nanowires. 2019-2022 Master of Science (MSc) in Organic Chemistry at Sapienza University, Rome 2016-2019 Bachelor of Science (BSc) in Chemistry at Sapienza University, Rome Back to Top Sapienza University of Rome, Physics Department francesca.santangeli@uniroma1.it Office: n° 349, third floor, Marconi building, Physics Department

< Back Akant Sagar Sharma Post-Doc Researcher Curriculum Vitae Publications since 2023 Postdoctoral Researcher in Nano-spectroscopy group, Department of Physics, Sapienza University of Rome, Italy. Supervisor: Prof. Marta De Luca. Currently working on the project “ Advanced optical spectroscopy of site-controlled single photon sources in single III-V nanowires” within the ERC Starting grant “NANOWHYR ”. 2021-2023 Postdoctoral Researcher in the Ultrafast Spectroscopy Group, School of Physics, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala, India. Supervisor: Prof. Rajeev N. Kini. I worked in the field of temperature-dependent ultrafast hot carrier dynamics of III-V-Bismide semiconductors using pump-probe spectroscopy. Also studied the temperature-dependent electrical transport properties of III-V-bismide semiconductors. 2014-2021 (Due to COVID-19 the time taken from thesis submission to final defence is almost 2 years.) Ph.D. in Technology. Subject: Nanoscience and Nanotechnology, CRNN, University of Calcutta, Kolkata, West Bengal, India. Supervisor: Prof. Sunanda Dhar. Thesis Title: “ Interfacial Strain and Related Effect in III-V Nitride and Bismide Semiconductor Heterojunctions and Nanostructures ”. 2012-2014 Master of Science in Electronic Science, Calcutta University, Kolkata, West Bengal, India. 2009-2012 Bachelor of Science in Electronics, Vidyasagar College, University of Calcutta, Kolkata, West Bengal, India. Back to Top Sapienza University of Rome, Physics Department akantsagar.sharma@uniroma1.it Office: n° 349, third floor, Marconi building, Physics Department

PRIN Project Nanowires (NWs) are quasi-1D crystals with nanoscale diameters and several microns in length. This project aims at growing and thoroughly investigating quantum dots (QDs) and superlattices (SLs) in two different III-V NW heterostructures: GaAsP/GaP NWs, for photonic and optoelectronic applications in the visible-near infrared range, and InAsP/InP NWs, for telecom-wavelengths applications. The well-known vapor-liquid-solid growth approach will be employed to realize bottom-up NWs incorporating QDs of controllable size, position and chemical composition. In particular, we will use the chemical beam epitaxy technique, which combines the advantages of ultra-high-vacuum epitaxial growth with the ease of use and flexibility given by metalorganic precursor gas sources. The controlled NW morphology and diameter will be exploited for the optimization of the waveguiding properties of NWs for the nested QDs. Scanning electron microscopy (SEM) for morphology characterization and energy dispersive x-ray spectroscopy (EDX) for compositional analysis are performed in-house with a field emission gun (FEG) electron microscope operating up to 30 kV. Electron Beam Lithography (EBL) for substrate patterning is performed instead with a dedicated FEG SEM equipped with an interferometric stage. The CNR unit in Pisa has a remarkable expertise in the growth and structural characterization of III-V semiconductor nanowires, axial and radial nanowire heterostructures, and selective area nanostructures. The Chemical Beam Epitaxy (CBE) system and the cleanroom facility of the National Enterprise for nanoScience and nanoTechnology (NEST) Laboratory of Scuola Normale Superiore, where the Nanoscience institute of CNR is headquartered are fully available for the project.The CBE is equipped with a Riber Compact-21 growth chamber with an integrated Reflection of High Energy Electron Diffraction (RHEED) system for in-situ monitoring and an optical pyrometer for the substrate temperature measurement. Available group-V materials are arsenic (TBAs), phosphorous (TBP), and antimony (TDMASb and TMSb); for group III there are indium (TMIn), gallium (TEGa), and aluminium (TMAl) precursors. Transmission electron microscopy (TEM) to investigate the nanowires structural quality (crystal phase, interface sharpness, strain distribution) is also performed by the CNR unit, in collaboration with the Center for Instrument Sharing (CISUP) of the University of Pisa. R. Sorodoc, P. De Vincenzi, ACS Appl. Mater. Interfaces 16, 47 (2024) The growth and the structural characterization of the NWs performed at the CNR unit is cross-correlated to advanced optical spectroscopy experiments (inelastic light scattering and photoluminescence) carried out at Sapienza University. The optical measurements are performed also with a photon-correlation setup to probe the properties of the grown QDs. The close synergy of the two units allows a continuous flow of samples and information. In this way, a full picture of the structural, electronic, and optical properties of the QDs and SLs in NWs is achieved and controllably tuned. Single QDs in NWs with high brightness and low multi-photon emission probability are being realized within this project, as well SLs with a tunable period, in order to determine the new type of band alignment arising in the SL and show the potential of these SLs for NW-based optoelectronic applications such as photodetectors. Furthermore, NWs with GaAsP (with varying concentrations of As and P) in the wurtzite phase were created to study the new optical and electronic properties of the material in this new crystalline phase. The results of this study are then used as a starting point to better understand the effects of quantum confinement in the previously mentioned samples. Team members: Dr. Valentina Zannier, CNR researcher Prof. Marta De Luca, Sapienza University professor Prof. Lucia Sorba, CNR research director Robert Andrei Sorodoc, CNR fellow Paolo De Vincenzi, PhD student of Sapienza University Giada Bucci, PhD student of Scuola Normale Superiore Publications: Quantum Light Emission from GaAsxP1–x Quantum Dots in Wurtzite GaP Nanowires. P. De Vincenzi, R. A. Sorodoc, A. S. Sharma, M. Roggi, I. Santanchè, L. Perrini, E. Mugnaioli, R. Rurali, F. Beltram, L. Sorba, V. Zannier and M. De Luca*. ACS Appl. Mater. Interfaces (2026) Tunable GaAsxP1-x quantum dot emission in wurtzite GaP Nanowires . R. Andrei Sorodoc+, P. De Vincenzi+, A. Sagar Sharma, G. Bucci, M. Roggi, E. Mugnaioli, L. Sorba, M. De Luca and V. Zannier (+ equal contribution). ACS Appl. Mater. Interfaces 16, 47 (2024) Zincblende InAsxP1–x/InP Quantum Dot Nanowires for Telecom Wavelength Emission. G. Bucci*, V. Zannier, F. Rossi, A. Musiał, J. Boniecki, G. Sęk, L. Sorba. ACS Appl. Mater. Interfaces 16, 20 (2024) InAs–InP Superlattice Nanowires with Tunable Phonon Frequencies, V. Zannier, J. Trautvetter, A. K. Sivan, F. Rossi, D. de Matteis, B. Abad, R. Rurali, L. Sorba, I. Zardo. Advanced Physics Research 3, 6 (2024) Revealing Inclined Twin Related Defects in III–V Nanowires Grown in Popular Alternative Crystallographic Directions, H. A. Fonseka, N. Denis, J. A. Gott, X. Yuan, R. Beanland, H. H. Tan , C. Jagadish, A. M. Sanchez, M. De Luca*. J. Phys. Chem. C, 128, 21593 (2024) Phonon Interference Effects in GaAs-GaP Superlattice Nanowires, C. Arya, J. Trautvetter, J. M. Sojo-Gordillo, Y. Kaur, V. Zannier, A. Nigro, F. Beltram, T. Albrigi, A. Ruiz-Caridad, L. Sorba, R. Rurali I. Zardo*. ACS Nano, 19, 50, 42013–42021 (2025)

Publication List Articles Published or under revision in Peer-Reviewed Journals < Back 1. Nadine Denis, Akant Sagar Sharma, Elena Blundo, Francesca Santangeli, Paolo De Vincenzi, Riccardo Pallucchi, Mitsuki Yukimune, Alexander Vogel, Ilaria Zardo, Antonio Polimeni, Fumitaro Ishikawa, Marta De Luca, "Bandgap Engineering On Demand in GaAsN Nanowires by Post-Growth Hydrogen Implantation", Small (2025) https://doi.org/10.1002/smll.202506091 2. Nadine Denis; Akant Sagar Sharma; Didem Dede; Timur Nurmamytov; Salvatore Cianci; Francesca Santangeli; Marco Felici; Victor Boureau; Antonio Polimeni; Silvia Rubini; Anna Fontcuberta i Morral; Marta De Luca. "Single Photon Emitters in Thin GaAsN Nanowire Tubes Grown on Si", ACS Nano, 19, 46, 39757–39767(2025). https://doi.org/10.1021/acsnano.5c12139 3. F. Valentini, I. A. Colasanti, C. Zaratti, D. Filimon, A. Macchia, A. Neri, M. Relucenti, M. Reverberi, I. Allegrini, E. Guerriero, M. Cerasa, M. De Luca , F. Santangeli, R. Braglia, F. Scuderi, L. Rugnini, R. Ranaldi, R. De Meis and A. Canini. "TiO2 and CaCO3 Microparticles Produced in Aqueous Extracts from Satureja montana: Synthesis, Characterization, and Preliminary Antimicrobial Test", Molecules, 30, 20, 4138 (2025). https://doi.org/10.3390/molecules30204138 Oral Contribution : “Bandgap engineering across telecom wavelengths of InN nanowires by post-growth hydrogen irradiation” Conference: Nanowire Week 2025 Date, where: 25 – 29/08/2025, St John’s College, University of Cambridge, Cambridge, UK Invited Talk : “Giant bandgap tuning of InN nanowires by post-growth Hydrogen irradiation for creation of tunable quantum dots” Conference/Institution: Université de Rouen Date, where : 21 – 25/04/2025, Rouen, France Poster : “Bandgap manipulation of nanowires by post-growth hydrogenation” Conference/Institution : Dipartimento di Fisica, Università Sapienza di Roma – Evento dipartimentale She Rocks Science 2025 Date, where : 07/03/2025, Rome, Italy Oral Contribution : “Giant bandgap tuning of InN nanowires by post-growth Hydrogen irradiation for creation of tunable quantum dots” Conference/Institution : Nanoinnovation, Sapienza Università di Roma Date, where : 09 – 13/09/2024, Rome, Italy Poster : “Giant bandgap tuning of InN nanowires by post-growth Hydrogen irradiation for creation of tunable quantum dots” Conference/Institution : Dipartimento di Fisica, Università Sapienza di Roma – Evento dipartimentale She Rocks Science 2024 Date, where : 12/02/2024, Rome, Italy Poster : “Giant bandgap tuning of InN nanowires by post-growth hydrogen irradiation” Conference/Institution : Quantum Technology from fundamental science to real world applications – Postgraduate Summer School, Ettore Majorana Foundation, Erice Date, where : 02 – 07/10/2023, Erice, Italy Poster : “Development of RSV-loaded liposomes to investigate the delivery across the Blood Brain Barrier” Conference/Institution : First Symposium for YouNg Chemists: Innovation and Sustainability, Dipartimento di Chimica, Università Sapienza di Roma Date, where : 20 – 23/06/2022, Rome, Italy

Our Techniques Room Temperature & Cryogenic Photoluminescence and Raman Spectroscopy Setups In the Nano-spectroscopy Lab we do spectroscopy at the nanoscale on nanostructures. We are expert in the design and realization of customized advanced optical spectroscopy setups for photoluminescence, absorption, and Raman measurements performed in a spatially-resolved manner on single nanostructures. We are able to work at the edge of the light diffraction limit or to beat it with several techniques, such as beam shaping or coupling to AFM tips (near-field optical microscopy), achieving a 50-100 nm spatial resolution. Low-temperature Spectroscopy Setup We have room temperature and cryogenic (closed-cycle cryo-free cryostat) setups, both with positioning accuracy of 50 nm. We apply optical techniques under different experimental conditions (varying excitation power density, sample temperature, light polarization, magnetic fields). By creating our customized setups we maximize signal-to-noise ratio with respect to commercial setups. Tunable Excitation Light We have three extra narrow-band continuous wave lasers and one pulsed light source with tunable wavelength (450-1100 nm) and tunable repetition rate. We have spectrometers and detectors to detect signal from 450 nm to 2100 nm. Second-order autocorrelation Setup We can perform also second-order autocorrelation measurements under continuous wave or pulsed excitation, as well as time resolved photoluminescence spectroscopy. Micromanipulation Setup We are specialized in the micro-manipulation of single nanostructures under optical microscope, and in the integration of nanostructures into new devices. For transfering our low dimensional materials, such as flakes, we have access to the Department facilities coupled to anaerobic chamber. Micromanipulators equipped with tips for fine nanowire placement To perform pick-and-place techniques with nanowires we employ glass or metal needles (100 nm to 500 nm of tip radius). Nanowire on TEM Grid Pick-and-place allows to pick up selected nanowires from the growth chip and transfer them to TEM grids for further investigation.

< Back Simone Nucchi Master Student Curriculum Vitae Publications since 2024 Master Student of Science (MSc) in Condensed Matter Physics at Sapienza University, Rome. 2021-2024 Bachelor of Science (BSc) in Physics at Sapienza University, Rome Back to Top Sapienza University of Rome, Physics Department Office: n° 349, third floor, Marconi building, Physics Department

< Back Viola Valeau Master Student Curriculum Vitae Publications since 2023 Master Student of Science (MSc) in Condensed Matter Physics at Sapienza University, Rome. 2020-2023 Bachelor of Science (BSc) in Physics at Sapienza University, Rome Back to Top Sapienza University of Rome, Physics Department Office: n° 312, third floor, Marconi building, Physics Department

Teaching You can find more information on the courses taught by Prof. Marta De Luca here . Physics for Biology Info here: e-learning Laboratory of Mechanics for Physicists Info here: e-learning

< Back Mario Roggi Master Student Curriculum Vitae Publications 2022-2024 Master of Science (MSc) in Condensed Matter Physics at Sapienza University, Rome. Completed his master’s thesis in the Nanospectroscopy Group at the Physics Department of the Sapienza University, focusing Low Temperature Micro-photoluminescence Measurements of III-V Nanowire Quantum Dots. 2018-2022 Bachelor of Science (BSc) in Physics at Sapienza University, Rome Back to Top Sapienza University of Rome, Physics Department Office:

Organized Conferences Prof. De Luca co-organizes the IEEE Nanotechnology Materials and Devices Conference in October 2023, Paestum, Italy . Symposium ‘Fundamentals and applications of nanotubes, nanowires, quantum dots and other low dimensional materials’ Prof. De Luca co-organizes the CLEO/Europe Focus Meeting (ECOC, European Conference on Optical Communication) in September 2022, Basel, Switzerland. Symposium ‘Novel Photonic Materials & Effects’ Invited Talks Prof. De Luca gives a talk for the International Symposium on Semiconductor Optoelectronics and Nanotechnology (ISSON) in the Department of Electronic Materials Engineering of the Australian National University on the 9.11.2024. Prof. De Luca gives an invited talk for the Quantum Science & Technology Seminars in the Physics Department of Federico II University in Naples (Italy) on the 27.10.2023. Prof. De Luca gives an invited talk at the IEEE Nanotechnology Materials and Devices Conference (NMDC) in Paestum (Italy) on the 24.10.2023. https://ieeenmdc.org/past-conferences/nmdc-2023/ Prof. De Luca gives an invited talk at the Phonons Conference 2023 in Paris (France) on the 05.07.2023 https://phonons2023.sciencesconf.org/ Prof. De Luca gives an invited talk at the International Conference on Solid State Devices and Materials (SSDM) in Chiba (Japan) on 27.09.2022 https://ssdm.jp/2022/ Prof. De Luca gives an invited talk at the Rank Prize symposium on Nanowire Photonics in Grasmere in Lake District (UK) on 08.11.2022 https://www.rankprize.org/symposia/nanowire-photonics-2/