

# Event Details

- **Event Name**:  IPB Colloquium by Žarko Gačević
- **Event Start and End Date**: Thu, 25 Dec, 2025 at 02:00 pm
- **Event Description**: You are cordially invited to the IPB COLLOQUIUM which will be held on Thursday, 25 December 2025 at 14:00 in the “Zvonko Marić” lecture hall of the Institute of Physics Belgrade. The talk entitled

???-????? ??????-?????? ??????? ??? ????? ????????? ??? ??????? ??? ????????????

will be given by Žarko Gačević (Technical University of Madrid, Madrid, Spain). The abstract of the talk:

For more than two decades, the quest for practical, stable, and scalable single-photon sources has been at the forefront of quantum photonics research. While numerous material platforms, such as quantum dots, color centers, and two-dimensional materials, have demonstrated promising performance, many still face limitations including cryogenic operation, spectral instability, or technological incompatibility with established semiconductor processes. In this context, the III-nitride material system, and GaN in particular, has recently emerged as a highly compelling candidate for SPS technologies thanks to its robustness, wide bandgap, mature industrial ecosystem, and compatibility with visible and telecom-wavelength emission.

This colloquium reviews the current state of semiconductor single-photon sources, highlighting recent advances achieved in the development of InGaN/GaN nanowire–based emitters grown by molecular beam epitaxy at ISOM-UPM [1–3]. These nanostructures naturally host localized quantum emitters capable of producing antibunched light with good stability. The talk will highlight the underlying physical mechanisms leading to single-photon generation, the role of nanoscale composition and strain fluctuations, and the fabrication strategies to improve control of emitter formation. Building on this quantum-light platform, the seminar will then introduce the principles of quantum key distribution, focusing on hybrid time-bin/phase encoding architecture for fiber-based communication. Together, these developments illustrate a coherent path toward single photon driven photonic quantum technologies.

[1] Ž. Gačević, N. Vukmirović, N. García-Lepetit, A. Torres-Pardo, M. Müller, S. Metzner, S. Albert, A. Bengoechea-Encabo, F. Bertram, P. Veit, J. Christen, J. M. González-Calbet, and E. Calleja, “Influence of composition, strain, and electric field anisotropy on different emission colors and recombination dynamics from InGaN nanodisks in pencil-like GaN nanowires”, Phys. Rev. B 93, 125436 (2016).
[2]Ž. Gačević, M. Holmes, E. Chernysheva, M. Müller, A. Torres-Pardo, P. Veit, F. Bertram, J. Christen, J. M. González-Calbet, Y. Arakawa, E. Calleja, and S. Lazić, “Emission of linearly polarized single photons from quantum dots contained in nonpolar, semipolar, and polar sections of pencil-like InGaN/GaN nanowires”, ACS Photonics 4, 657–664 (2017).
[3] J. Obradović, M. Tinoco, L. Monge Bartolomé, V. J. Gómez Hernández, A. Torres-Pardo, S. Fernández-Garrido, Á. de Guzmán, and Ž. Gačević, “Formation mechanisms of (In,Ga)N nanoshells conformally grown around pencil-like GaN nanowires”, Cryst. Growth Des. (2026, accepted for publication).

The visit of Prof. Žarko Gačević is supported by the Science Fund of the Republic of Serbia, Grant No. 226, Development of GaN Nanowire Based Quantum Light Emitters – PhotonGaN.
- **Event URL**: https://allevents.in/zemun/ipb-colloquium-by-Žarko-gačević/200029404409253
- **Event Categories**: workshops
- **Interested Audience**: 
  - total_interested_count: 3

## Ticket Details

- **Ticket URL**: http://facebook.com/200029404409253?utm_source=AllEvents.in&utm_medium=event-discovery-platform&utm_campaign=zemun-events

## Event venue details

- **city**: Zemun
- **state**: SR
- **country**: Yugoslavia
- **location**: Institute of Physics Belgrade
- **lat**: 44.85527
- **long**: 20.39052
- **full address**: Institute of Physics Belgrade, Улица Прегревица 115, 11080 Београд, Србија, Zemun, Yugoslavia

## Event Organizer details

- **affiliate_id**: 2
- **organizer**: SCL IPB (https://allevents.in/org/scl-ipb/26520070)

## Event gallery

- **Alt text**: banner
  - **Image URL**: https://cdn-az.allevents.in/events8/banners/14fc0523a77e86ed70813c29c4c6b3d6b3a25b1f5224d383a6335a45e06d8cc4-rimg-w1200-h801-dc161617-gmir?v=1766648512
- **Alt text**: thumbnail
  - **Image URL**: https://cdn-az.allevents.in/events8/banners/a3a4a8b6a53599d1a998fd70ce3371d9ad4e859283536eb06b22fc779c3eaf17-rimg-w300-h300-dc161516-gmir?v=1766648513

## FAQs

- **Q**: When is the event happening?
  - **A:** Thu, 25 Dec, 2025 at 02:00 pm
- **Q**: Where is the event happening?
  - **A:** Institute of Physics Belgrade, Улица Прегревица 115, 11080 Београд, Србија, Zemun, Yugoslavia
- **Q**: Who is organizing the event?
  - **A:** SCL IPB
- **Q**: What type of event is this?
  - **A:** workshops
- **Q**: Where can I find ticket details about  IPB Colloquium by Žarko Gačević ?
  - **A:** You can find ticket details about this event on AllEvents.

## Structured Data (JSON-LD)

```json
[
    {
        "@context": "https://schema.org",
        "@type": "Event",
        "name": "IPB Colloquium by Žarko Gačević",
        "image": "https://cdn-az.allevents.in/events8/banners/14fc0523a77e86ed70813c29c4c6b3d6b3a25b1f5224d383a6335a45e06d8cc4-rimg-w1200-h801-dc161617-gmir?v=1766648512",
        "startDate": "2025-12-25",
        "url": "https://allevents.in/zemun/ipb-colloquium-by-Žarko-gačević/200029404409253",
        "location": {
            "@type": "Place",
            "name": "Institute of Physics Belgrade",
            "address": {
                "@type": "PostalAddress",
                "streetAddress": "Улица Прегревица 115, 11080 Београд, Србија",
                "addressLocality": "Zemun",
                "addressRegion": "SR",
                "addressCountry": "YU"
            },
            "geo": {
                "@type": "GeoCoordinates",
                "latitude": "44.85527",
                "longitude": "20.39052"
            }
        },
        "eventAttendanceMode": "https://schema.org/OfflineEventAttendanceMode",
        "description": "You are cordially invited to the IPB COLLOQUIUM which will be held on Thursday, 25 December 2025 at 14:00 in the “Zvonko Marić” lecture hall of the Institute of Physics Belgrade. The talk entitled\n\n???-????? ??????-?????? ??????? ??? ????? ????????? ??? ??????? ??? ????????????\n\nwill be given by Žar",
        "organizer": [
            {
                "@type": "Organization",
                "name": "SCL IPB",
                "url": "https://allevents.in/org/scl-ipb/26520070"
            }
        ]
    }
]
```