Collaborations - Prof. F. Ishikawa, Hokkaido University (Japan) - Prof. S. Zhao and Prof. Z. Mi, Mc Gill University (Canada) - Prof. H. Tan and Prof. C. Jagadish, Australian National University (Australia) - Prof. A. Fontcuberta i Morral, EPFL (Switzerland) - Prof. L. Sorba, Dr. V. Zannier, CNR nano and Scuola Normale Superiore (Italy) - Dr. S. Rubini, CNR Tasc (Italy) - Prof. A. Sanchez, Warwick University (UK) - Dr. R. Rurali, ICMAB (Spain) - Prof. I. Zardo, University of Basel (Switzerland) - Prof. A. Polimeni and Prof. M. Felici, Sapienza University (Italy) Fundings GROUNDS : Growth and optical studies of tunable quantum dots and superlattices in semiconductor nanowires HELIOS : Bright telecom-band single photon sources in bottom-up nanowire waveguides Development of single photon quantum states based on quantum dots operating at different wavelengths NANOWHYR : Dots-in-NANOWires by near-field illumination: novel single-photon sources for HYbRid quantum photonic circuits

The Team Micromanipulation with Glass Tips Cryostat's Nanopositioner System The Team 1/8 Welcome to Our Lab

< Back Antonio Miriametro Technical Collaborator Curriculum Vitae Publications Antonio Miriametro is an electronic technician at the Department of Physics of the University of Rome "La Sapienza". He is highly committed to his job, he likes analog and digital electronics (preferably the digital one), as well as computer science. His activity involves the technical collaboration with research projects, by developing new electronic hardware and software designs, as well as complicatd automation systems. He is also in charge of maintaining and repairing the electronic and opto-mechanics equipment used in the research laboratories working on condensed matter, optical/electronic specroscopies and photonics. He is specialist in L.A.S.E.R systems. From 1993 to 2001, he participated in seven Antarctic campaigns, as electronic manager at O.A.S.I. (Submillimetric Infrared Antarctic Observatory) at the Italian base "Baia Terra Nova" (now "Mario Zucchelli" 74 ° 41 '42 "South and 164 ° 05 '58" East). His last Antarctic campaign was in 2007 at the Dome Concordia Station (75°07'S 123°22'E) on the Antarctic plateau at 3250 meters above m.s.l. for the COCHISE project (Cosmological Observations at Concordia with High-sensitivity Instrument for Source Extraction). Presently, he provides technical assistance within various European projects in the Physics Department. Back to Top Sapienza University of Rome, Physics Department antonio.miriametro@uniroma1.it Office: n° 304, third floor, Marconi building, Physics Department

< Back Carola Castrucci Administrative Coordinator Curriculum Vitae Publications I earned my degree in Linguistics, Literature, and Translation Studies from Sapienza University of Rome in 2020. I started working at Sapienza’s Physics Department in July 2022 as administrative coordinator of the Erasmus Mundus Joint Master’s Programmes. Since September 2025, my responsibilities have expanded to include the ERC Nanowhyr project. Back to Top carola.castrucci@uniroma1.it carola.castrucci@uniroma1.it Office: n° 104, first floor, Marconi building, Physics Department

ERC Project The group hosts the ERC Starting grant of Marta De Luca. NANOWHYR: Dots-in-NANOWires by near-field illumination: novel single-photon sources for HYbRid quantum photonic circuits The project aims at creating movable quantum light emitters for photonic circuits. In silicon-based quantum photonic circuits, a significant challenge is the efficient integration of a III-V-based single photon source. We are utilizing semiconductor nanowires because they can be grown directly on silicon or transferred to it after growth. When a nanowire incorporates a single photon emitter, such as a quantum dot, it becomes a movable light source. We are exploring the fabrication of quantum light emitters via a combination of hydrogenation and near-field illumination. This method enables the creation of an arbitrary number of quantum light emitters, which can be controlled in energy and position, allowing for integration in cavities.

< Back Muhammad Tahir PhD Student Curriculum Vitae Publications since 2023 PhD Student, Nanospectroscopy Group, Department of PhysicsSapienza University of Rome, Italy. Currently focusing on tuning the optoelectronic and thermoelectric properties of indium nitride (InN) nanowires. 2018-2020 Master of Science (MSc) in PhysicsCOMSATS University Islamabad, Pakistan 2013-2017 Bachelor of Science (BSc) in PhysicsBahauddin Zakariya University, Multan, Pakistan Back to Top Sapienza University of Rome, Physics Department muhammad.tahir@uniroma1.it Office: n° 349, third floor, Marconi building, Physics Department

< Back Isabella Santanchè Researcher Curriculum Vitae Publications 2023-2026 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

< Back Xiangyu Lin Research Assistant Curriculum Vitae Publications Summer 2025: Research assistant in Nano-spectroscopy group, Department of Physics, Sapienza University of Rome, Italy. 2020-2023: Master of Science (MSc) in Physics at Niels Bohr Institute, University of Copenhagen, Denmark 2014-2019: Bachelor of Science (BSc) in Physics at Collage of Arts and Science and Bachelor of Engineering (B.E.) in Electrical Engineering at Collage of Engineering, University of Missouri - Columbia, United States Back to Top Office:

Publication List Articles Published or under revision in Peer-Reviewed Journals < Back 1. Surfactant Free Platinum Nanoclusters as Fluorescent Probe for the Selective Detection of Fe(III) Ions Anu George, Harikrishnan G., Sukhendu Mandal* (Sens.Actuators B 243 (2017)332- 337). 2. Negative photoresponse of ZnO-PEDOT:PSS nanocomposites and photogating effects Harikrishnan G.*, Sesha Vempati, K Bandopadhyay, K. Prajapati, Vijith Kalathingal and J. Mitra* (Nanoscale Advances,1 (2019)2435). 3. Epsilon-near-zero response in Indium Tin Oxide thin fims: Octave span tuning and IR plasmonics Ben Johns, Navas M P, Harikrishnan G., Akhileshwar Mishra, Ravi Pant, J. Mitra* (Journal of Applied Physics 127(4):043102(2020)). 4. Enhancement in electrical conductivity of a porous indium based metal-organic framework upon 12 uptake: combined experimental and theoretical investigations Mani Prabhu, Mandal Nilangshu, Roopesh Mekkat, Harikrishnan G., Datta Ayan, Mandal Sukhendu* (Journal of Materials Chemistry C 8(14):4836-4842(2020)). 5. Controlling the macroscopic electrical properties of reduced graphene oxide by nanoscale writing of electronic channels Arijit Kayal, Harikrishnan G.,K. Bandopaghyay, Amit Kumar, S. Ravi P. Silva, J.Mitra* (Nanotechnology, 2021.32(17):p.175202). 6. Mobility enhancement in CVD-grown monolayer MoS2 via patterned substrate induced non-uniform straining Arijit Kayal, Sraboni Dey, Harikrishnan G., Nadarajan Renjith, Chattopadhyay Shashwata, J.Mitra* (Nano Lett. 2023, 23, 14, 6629-6636). 7. Anomalous Photoresponse in a Reduced Metal- Semiconductor Hybrid of Nickel and Titanium Oxide Harikrishnan G., K. Bandopadhyay, K. Kolodziejak, Vinayak B Kamble, Dorota A. Pawlak, J.Mitra * (arXiv:2309.17427 [physics.app-ph]). 8. Negative resistance and anomalous transport properties of a porous anisotropic (Ni- TiO2) hybrid system Harikrishnan G., Shashwata Chattopadhyay, K. Bandopadhyay, K. Kolodziejak, Dorota A. Pawlak, J.Mitra * (arXiv:2310.02976 [cond-mat.mtrl-sci]). Poster : “Comprehensive Raman toolkit to probe crystal quality, geometry, and vibrational properties of InN nanowires” Conference: Nanowire Week 2025 Date, where: 25 – 29/08/2025, St John’s College, University of Cambridge, Cambridge, UK Authors: Harikrishnan Gopalakrishnan, Francesca Santangeli, Pietro Todesco, Muhammad Tahir, Ernesto Placidi, Francesco Mura, Zetian Mi, Songrui Zhao, and Marta De Luca.

Open Positions WHAT WE REQUIRE: Passion for designing and developing new experiments from scratch Thirst for knowledge Excellent communication skills and marked team spirit WHAT WE OFFER: A passionate, young and multidisciplinary group Special attention to diversity, both in gender and in nationality Candidates from all over the world and with all genders are welcomed Post-doc We have one open post-doc position on the ERC grant. Here are the details . PhD Student We have 1 open PhD position. The PhD in Italy lasts 3 years . PhD students do not have teaching duties but only research duties. However, in the first 1.5 years they have to attend courses and give exams. Admission to the PhD schools is very competitive and takes place only once a year, typically in June, for starting the PhD in November. Admission is decided by a committee, not by the Nanospectrosocpy group. However, before applying, you will have to send an email to marta.deluca@uniroma1.it with your CV and short motivation, and you may be asked to do an oral interview with the Nanospectrosocpy group before you submit your application to the PhD schools. There are two main PhD schools. Here you can find information on how to apply and which courses you can attend: PhD school in Physics (https://phd.uniroma1.it/web/PHYSICS_nD3503_EN.aspx ) PhD school in Materials Science (https://phd.uniroma1.it/web/MATHEMATICAL-MODELS-FOR-ENGINEERING,-ELECTROMAGNETICS-AND-NANOSCIENCES_nD3523_EN.aspx ) Master Student We have 2 open positions per year, and about 4-5 different projects. Contact marta.deluca@uniroma1.it to know more about the projects and do a lab tour. We welcome students from different Departments, ranging from Physics to Nanoscience and Chemistry.

Our Goals Nanostructures, such as 2D materials or nanowires, have revolutionized the field of semiconductors, making it possible, among others, to transform indirect bandgap materials to direct bandgap materials, or making it possible for a crystal to grow in a crystal structure that does not exist in bulk. We work in close collaboration with several growth laboratories providing nanostructures, and we functionalize them by several methods, such as hydrogen or helium irradiation, laser heating, thermal annealing, nanoscale patterning etc. to achieve the desired properties. Working at the boundaries between fundamental physics and technological applications, our goal is to achieve new functionalities or explore new physical effects. Advances in Optics and Photonics 13 (2021): 242. However, in the Nano-spectroscopy group we are not happy to work just with nanostructures: we create nanostructures inside the nanostructures. In our vision the nanostructures are scaffolds embedding smaller quantum structures (quantum dots, point defects that emit single photons, quantum rings, quantum wells, etc.) with diverse dimensionalities (0D, 1D, and 2D). For example, in nanowire lasers, by embedding quantum confined structures as active gain media it is possible to enhance the gain and lower lasing threshold. Moreover, by embedding quantum dots in nanowires for quantum photonic applications based on single photon emitters, it can be possible to obtain a higher photon extraction than in standard self-assembled dots embedded in a 3D matrix, owing to the possibility to design the nanowire to act as a waveguide with a photon out-coupler. This makes quantum dots in nanowires the ideal building block of quantum photonic circuits. Furthermore, by embedding quantum rings in quantum wells, one can unveil the topological phase of charge carriers, by controlling the appearance of magnetic states expected due to the circular symmetry of the carrier wavefunction (Aharonov-Bohm effect). Explore our Projects Physics Today 1 September 2009; 62 (9): 38–43

Projects Single photon emitters in GaAsN nanowire tubes Bandgap engineering and strain engineering by hydrogenation in dilute nitrides nanowires Defect engineering and bandgap control in InN nanowires Tunable quantum dots in GaAsP and InAsP nanowires Micro-ring resonator lasers by self-assembly in InP Size-controlled and site-controlled quantum rings in quantum wells Unveiling new crystalline defects in InP nanowires Spectroscopic investigations on Hybrid 2D Perovskites