2021 - Present (Since moving to the University of Iowa)

42. Effect of core geometry on the channel capacity of a multimode optical fiber, H. C. Hammer, R. Uppu, Optica open preprint.

41. Observation of light propagation through a three-dimensional cavity superlattice in a 3D photonic band gap, M. Adhikary, M. Kozon, R. Uppu, W. L. Vos, Phys. Rev. Applied accepted (2024).

40. Hardware requirements for realizing a quantum advantage with deterministic single-photon sources, P. I. Sund, R. Uppu, S. Paesani, P. Lodahl, Phys. Rev. A 109, 042613 (2024).

39. Independent operation of two waveguide-integrated single-photon sources, C. Papon, Y. Wang, R. Uppu, S. Scholz, A. D. Wieck, A. Ludwig, P. Lodahl, L. Midolo, Phys. Rev. Applied 19, L061003 (2023).

38. Entanglement properties of a quantum-dot biexciton cascade in a chiral nanophotonic waveguide, E. M. Gonzalez-Ruiz, F. T. Osfeldt, R. Uppu, P. Lodahl, A. S. Sorensen, Phys. Rev. A 108, 013507 (2023).

37. S. Mujumdar, R. Uppu, Levy Fluctuations of Intensity in Random Lasers. In Gomes, A. S. L., Moura, A. L., de Araujo, C. B. (Eds.) Levy Statistics and Spin Glass Behavior in Random Lasers (pp. 77-104).

36. Clones of the Unclonable: Nanoduplicating Optical PUFs and Applications, E. Marakis, U. Ruehrmair, M. Lachner, R. Uppu, B. Skoric, P. W. H. Pinske arXiv:2212.12495

35. On-demand source of dual-rail photon pairs based on chiral interaction in a nanophotonic waveguide, F. T. Pedersen, E. M. Gonzalez-Ruiz, N. Hauff, Y. Wang, A. D. Wieck, A. Ludwig, R . Schott, L. Midolo, A. S. Sorensen, R. Uppu, P. Lodahl, Phys. Rev. X Quantum 3, 020363 (2022) [arXiv]

34. A pure and indistinguishable single-photon source at telecommunication wavelength, B. D. Lio, C. Fabry, X. Zhou, M. L. Chan, R. Uppu, H. Thyrrestrup, S. Scholz, A. D. Wieck, A. Ludwig, P. Lodahl, L. Midolo, Adv. Quantum Technol. 202200006 (2022). [arXiv]

33. Wafer-scale epitaxial modulation of quantum dot density,  N. Bart, C. Dangel, P. Zajac, N. Spitzer, J. Ritzmann, M. Schmidt, H. G. Babin, R. Schott, S. R. Valentin, S. Scholz, Y. Wang, R. Uppu, D. Najer, M. C. Löbl, N. Tomm, A. Javadi, N. O. Antoniadis, L. Midolo, K. Müller, R. J. Warburton, P. Lodahl, A. D. Wieck, J. J. Finley, A. Ludwig, Nat. Commun. 13, 1633 (2022). [arXiv]

32. Quantum-dot-based deterministic photon-emitter interfaces for scalable photonic quantum technology
R. Uppu, L. Midolo, X. Zhou, J. Carolan, P. Lodahl, Nat. Nanotechnol. 16, 1308-1317 (2021). [arXiv] [December 2021 Journal Cover]

31. Spatially shaping waves to penetrate deep inside a forbidden gap
R. Uppu*, M. A. Adhikary, C. A. M. Harteveld, W. L. Vos, Phys. Rev. Lett. 126, 177402 (2021) [arXiv] [APS Physics Feature]

 

 

 

2020 and earlier (Before University of Iowa)

30. Electroabsorption in gated GaAs nanophotonic waveguides
Y. Wang, R. Uppu, X. Zhou, C. Papon, S. Scholz, A. D. Wieck, A. Ludwig, P. Lodahl, and L. Midolo, Appl. Phys. Lett. 118, 131106 (2021) [arXiv]

29. Scalable integrated single-photon source
R. Uppu*, F. T. Pedersen, Y. Wang, C. T. Olesen, C. Papon, X. Zhou, L. Midolo, S. Scholz, A. D. Wieck, A. Ludwig, P. Lodahl, Sci. Adv. 6, eabc8268 (2020) [arXiv]

28. Near Transform-Limited Quantum Dot Linewidths in a Broadband Photonic Crystal Waveguide
F. T. Pedersen, Y. Wang, C. T. Olesen, S. Scholz, A. D. Wieck, A. Ludwig, M. Löbl, R. J. Warburton, L. Midolo, R. Uppu*, P. Lodahl, ACS Photonics 7, 2343-2349 (2020) [arXiv]

27. On-chip deterministic operation of quantum dots in dual-mode waveguides for a plug-and-play single-photon source
R. Uppu*, H. T. Eriksen, H. Thyrrestrup, A. D. Ugurlu, Y. Wang, S. Scholz, A. D. Wieck, A. Ludwig, M. Löbl, R. J. Warburton, P. Lodahl, L. Midolo, Nat. Commun. 11, 3782 (2020) [arXiv]

26. On-chip nanomechanical filtering of quantum-dot single-photon sources
X. Zhou, R. Uppu, Z. Liu, C. Papon, R. Schott, A. D. Wieck, A. Ludwig, P. Lodahl, L. Midolo, Laser Photon. Rev. 14, 1900404 (2020) [arXiv]

25. Suspended spot-size converters for scalable single-photon devices
A. D. Ugurlu, H. Thyrrestrup, R. Uppu, C. Ouellet-Plamondon, R. Schott, A. D. Wieck, A. Ludwig, P. Lodahl, L. Midolo, Adv. Quantum Technol., 1900076 (2019) [arXiv]

24. Efficient demultiplexed single-photon source with a quantum dot coupled to a nanophotonic waveguide
T. Hummel, C. Ouellet-Plamondon, E. Ugur, I. Kulkova, T. Lund-Hansen, M. A. Broome, R. Uppu*, and P. Lodahl, Appl. Phys. Lett. 115, 021102 (2019) [arXiv][Journal Cover]

23. Deterministic and controllable photonic scattering media via direct laser writing
E. Marakis, R. Uppu, M. L. Meretska, K. J. Gorter, W. L. Vos, P. W. H. Pinkse, Adv. Opt. Mater. 8 2001438 (2020) [arXiv]

22. Experimental probe of a complete 3D photonic band gap
M. Adhikary, R. Uppu, C. A. M. Harteveld, D. A. Grishina, W. L. Vos, Opt. Express 28, 2683-2698 (2020) [arXiv]

21. Uniform line fillings
E. Marakis, M. L. Velsink, L. J. C. van Willenswaard, R. Uppu, and P. W. H. Pinkse, Phys. Rev. E 99, 043309 (2019) [arXiv]

20. Exponential Krylov time integration for multi-frequency optical response with monochromatic sources
M. A. Botchev, A. M. Hanse, and R. Uppu, J. Comput. Appl. Math. 340, 474-485 (2018) [arXiv]

19. Analytical model of light transport in scattering materials with strong absorption
M. L. Meretska,R. Uppu, G. Vissenberg, A. Lagendijk, W. L. IJzerman, and W. L. Vos, Opt. Express 25, A906-A921 (2017) [arXiv]

18. Asymmetric cryptography with physical unclonable keys
R. Uppu*, T. A. W. Wolterink, S. A. Goorden, B. Chen, B. Škorić, A. P. Mosk, and P. W. H. Pinkse, Quantum Sci. Technol. 4, 045011 (2019) [arXiv]

17. Transmitting more than 10 bit with a single photon
T. B. H. Tentrup, T. Hummel, T. A. W. Wolterink, R. Uppu, A. P. Mosk, and P. W. H. Pinkse, Opt. Express 25, 2826-2833 (2017) [arXiv]

16. Quantum optics of lossy asymmetric beam splitters
R. Uppu*, T. A. W. Wolterink, T. B. H. Tentrup, and P. W. H. Pinkse, Opt. Express 24, 16440-16449 (2016) [arXiv]

15. Programmable two-photon quantum interference in 103 channels in opaque scattering media
T. A. W. Wolterink, R. Uppu, G. Ctistis, W. L. Vos, K.-J. Boller, and P. W. H. Pinkse, Phys. Rev. A 93, 053817 (2016) [arXiv]

14. Single-mode, quasi-stable random lasing in amplifying periodic-on-average random system
A. K. Tiwari, K. S. Alee, R. Uppu, and S. Mujumdar, Appl. Phys. Lett. 104, 131112 (2014)

13. Experimental demonstration of small-angle bending in an active direct-coupled chain of spherical microcavities
A. K. Tiwari, R. Uppu, and S. Mujumdar, Appl. Phys. Lett. 103, 171108 (2013)

12. Frequency behavior of coherent random lasing in diffusive resonant media
A. K. Tiwari, R. Uppu, and S. Mujumdar, Photonics Nanostruct. 10, 415-422 (2012)

11. Collective lasing from a linear array of dielectric microspheres with gain
A. K. Tiwari, B. Chandra, R. Uppu, and S. Mujumdar, Opt. Express 20, 6598-6603 (2012)

10. Aerosol-based coherent random laser
A. K. Tiwari, R. Uppu, and S. Mujumdar, Opt. Letters 37, 1053-1055 (2012)

9. Persistent coherent random lasing using resonant scatterers
R. Uppu and S. Mujumdar, Optics Express 19, 23523-23531 (2011). (Also appears in Virtual Journal for Biomedical Optics, Vol. 7, Issue 1) [Publisher link]

8. Physical manifestation of extreme events in random lasers
R. Uppu and S. Mujumdar, Opt. Lett. 40, 5046 (2015)

7. Excitation-dependent diffuse super-reflection from a random laser
R. Uppu and S. Mujumdar, Phys. Rev. A 91, 053819 (2015)

6. Exponentially tempered Lévy sums in random lasers
R. Uppu and S. Mujumdar, Phys. Rev. Lett. 114, 183903 (2015)

5. Lévy exponents as universal identifiers of threshold and criticality in random lasers
R. Uppu and S. Mujumdar, Phys. Rev. A 90, 025801 (2014)

4. Dependence of the Gaussian-Lévy transition on the disorder strength in random lasers
R. Uppu and S. Mujumdar, Phys. Rev. A 87, 013822 (2013)

3. Identification of statistical regimes and crossovers in coherent random laser emission
R. Uppu, A. K. Tiwari, and S. Mujumdar, Opt. Letters 37, 662-664 (2012)

2. On the coherent modes of ultranarrowband random lasers with nonresonant feedback
R. Uppu and S. Mujumdar, Appl. Opt. 50, E13-E19 (2011)

1. Statistical fluctuations of coherent and incoherent intensity in random lasers with nonresonant feedback
R. Uppu and S. Mujumdar, Opt. Lett. 35, 2831-2833 (2010)