Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Ziemkiewicz, David"'
We show how to calculate the optical functions of a nanoplatelet, taking into account the effect of a dielectric confinement on excitonic states. Real density matrix approach is employed to obtain analytical and semi-analytical relations for the abso
Externí odkaz:
http://arxiv.org/abs/2406.01144
Autor:
Ziemkiewicz, David, Knez, David, Garcia, Evan P., Zielińska-Raczyńska, Sylwia, Czajkowski, Gerard, Salandrino, Alessandro, Kharintsev, Sergey S., Noskov, Aleksei I., Potma, Eric O., Fishman, Dmitry A.
Two-photon absorption in indirect gap semiconductors is an frequently encountered, but not well-understood phenomenon. To address this, the Real Density Matrix Approach is applied to describe two-photon absorption in silicon through the excitonic res
Externí odkaz:
http://arxiv.org/abs/2403.01019
Combining the microscopic calculation of superlattice minibands and the macroscopic real density matrix approach one can obtain electric susceptibilities of the superlattice system irradiated by an electromagnetical wave. It is shown how to compute t
Externí odkaz:
http://arxiv.org/abs/2312.07171
Publikováno v:
Phys. Rev. B 107, 195303 (2023)
A novel, copper-based plasmonic system is presented to provide optical to microwave photon conversion. The process uses highly excited levels in Cu2O Rydberg excitons and takes advantage of spoof plasmons, which allow for significant enhancement of t
Externí odkaz:
http://arxiv.org/abs/2312.07085
Autor:
Ziemkiewicz, David, Knez, David, Garcia, Evan P., Zielińska-Raczyńska, Sylwia, Czajkowski, Gerard, Salandrino, Alessandro, Kharintsev, Sergey S., Noskov, Aleksei I., Potma, Eric O., Fishman, Dmitry A.
Publikováno v:
Journal of Chemical Physics; 10/14/2024, Vol. 161 Issue 14, p1-15, 15p
We investigate the imaging properties of copper-based superlens surrounded by copper oxide (Cu$_2$O). A subwavelength image resolution of the order $\lambda/9$ is demonstrated theoretically and verified in numerical simulations. It is shown that the
Externí odkaz:
http://arxiv.org/abs/2210.10376
We investigate the propagation of surface plasmons (SPPs) in a thin layer of copper surrounded by copper oxide Cu$_2$O. It is shown that particularly strong excitons in Cu$_2$O can have considerable impact on plasmon propagation, providing many oppor
Externí odkaz:
http://arxiv.org/abs/2208.07184
The quantum confiment of Rydberg excitons (REs) in quantum structures opens the way towards considering nonlinear interactions in such systems. We present a theoretical calculation of optical functions in the case of a nonlinear coupling between REs
Externí odkaz:
http://arxiv.org/abs/2206.06610
Autor:
Morin, Corentin, Tignon, Jérôme, Mangeney, Juliette, Dhillon, Sukhdeep, Czajkowski, Gerard, Karpiński, Karol, Zielińska-Raczyńska, Sylwia, Ziemkiewicz, David, Boulier, Thomas
We investigate the nonlinear refraction induced by Rydberg excitons in $\mathrm{Cu_2O}$. Using a high-precision interferometry imaging technique that spatially resolves the nonlinear phase shift, we observe significant shifts at extremely low laser i
Externí odkaz:
http://arxiv.org/abs/2202.09239
Autor:
Ziemkiewicz, David
The dynamics of an unique type of clock mechanism known as grasshopper escapement is investigated with the aim of evaluating its accuracy in a noisy environment. It is demonstrated that the clock's precision scales linearly with the rate of its entro
Externí odkaz:
http://arxiv.org/abs/2111.07302