We discuss the remarkably versatile excitonic landscape, including bright, dark, localized and interlayer excitons.
Thomas Mueller, Ermin Malic 2018, 'Exciton physics and device application of two-dimensional transition metal dichalcogenidesemiconductors', npj 2D Materials and Applicationshttp://link.springer.com/article/10.1038/s41699-018-0074-2. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Strong coupling with excitonic states further reveals sub-bandgap states with low oscillator strength.
Johannes M. Richter, Branchi Federico, Franco V. A. Camargo, Nagahara Tetsuhiko, ZhaoBaodan, Richard H. Friend, Cerullo Giulio, Deschler Felix 2019, 'Ultrafast carrier interactions in metal-halide perovskites probed with two-dimensionalelectronic spectroscopy', EPJ Web of Conferenceshttps://www.epj-conferences.org/articles/epjconf/pdf/2019/10/epjconf_up2019_04012.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Two-dimensional materials offer the prospect of excitonic devices operating at room-temperature.
Marie-Elena Kleemann, Rohit Chikkaraddy, Evgeny M. Alexeev, Dean Kos, Cloudy Carnegie,Will Deacon, Alex Casalis de Pury, Christoph Große, Bart de Nijs, Jan Mertens, AlexanderI. Tartakovskii, Jeremy J. Baumberg 2017, 'Strong-coupling of WSe2 in ultra-compact plasmonic nanocavities at room temperature',Nature Communicationshttp://link.springer.com/article/10.1038/s41467-017-01398-3. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
This can open up the possibility of having quantum dot lasers using excitonic states.
K. Luhluh Jahan, A. Boda, I. V. Shankar, Ch. Narasimha Raju, Ashok Chatterjee 2018, 'Magnetic field effect on the energy levels of an exciton in a GaAs quantum dot: Applicationfor excitonic lasers', Scientific Reportshttp://link.springer.com/article/10.1038/s41598-018-23348-9. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The excitonic, impurity and defect related emission lifetimes are revealed for these structures.
Aurimas ČERŠKUS, Viktorija NARGELIENĖ, Algirdas SUŽIEDĖLIS, Steponas AŠMONTAS, JonasGRADAUSKAS, Benas KUNDROTAS, Roma RINKEVIČIENĖ 2014, 'Time-resolved Photoluminescence Characterisation of GaAs/AlxGa1–xAs Structures Designedfor Microwave and Terahertz Detectors', Medžiagotyrahttp://matsc.ktu.lt/index.php/MatSc/article/view/6317. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The excitonic peak obtained from the absorbance spectroscopy was observed at ~370 nm.
Mohammed Marie, Sanghamitra Mandal, Omar Manasreh 2015, 'An Electrochemical Glucose Sensor Based on Zinc Oxide Nanorods', Sensorshttp://www.mdpi.com/1424-8220/15/8/18714. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Finally, the excitonic interactions appear to be retained despite the observed layer sliding transition.
Akitoshi Nakano, Kento Sugawara, Shinya Tamura, Naoyuki Katayama, Kazuyuki Matsubayashi,Taku Okada, Yoshiya Uwatoko, Kouji Munakata, Akiko Nakao, Hajime Sagayama, Reiji Kumai,Kunihisa Sugimoto, Naoyuki Maejima, Akihiko Machida, Tetsu Watanuki, Hiroshi Sawa 2018, 'Pressure-induced coherent sliding-layer transition in the excitonic insulator Ta2NiSe5',IUCrJhttp://scripts.iucr.org/cgi-bin/paper?S2052252517018334. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Two-dimensional, organic-inorganic hybrid perovskites have sustained research interest due to attractive optoelectronic and excitonic properties.
Peijun Guo, Constantinos C. Stoumpos, Lingling Mao, Sridhar Sadasivam, John B. Ketterson,Pierre Darancet, Mercouri G. Kanatzidis, Richard D. Schaller 2018, 'Cross-plane coherent acoustic phonons in two-dimensional organic-inorganic hybridperovskites', Nature Communicationshttp://link.springer.com/article/10.1038/s41467-018-04429-9. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Thus, we study the dependence of the entanglement with the photonic and excitonic relaxation rates.
Juan C López-Carreño, Herbert Vinck-Posada 2014, 'ENTANGLEMENT BETWEEN TWO SINGLE-PHOTON SOURCES DUE TO A BEAM SPLITTER', Momentohttps://revistas.unal.edu.co/index.php/momento/article/view/50625. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)