Onset of Bloch oscillations in the almost-strong-field regime

Reislöhner, Jan; Doyeong, Kim,; Babushkin, Ihar; Pfeiffer, Adrian N.

doi:10.1038/s41467-022-35401-3

Cited by 4 publications

(6 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As one of the most fundamental phenomena in solid-state physics, BOs were observed firstly in semiconductor superlattices [26,27]. In the following decades, BOs have been observed in various physical systems, including ultracold atoms [28,29], Bose-Einstein condensates [30,31], and some classical wave systems [32][33][34][35][36][37][38][39][40][41][42]. However, the experimental observation of the non-Abelian topological BOs keeps a challenge due to the strong anisotropy of the HOTI model.…”

Section: Based On the Above Results We Can Further Obtain Thatmentioning

confidence: 99%

Three-dimensional non-Abelian Bloch oscillations and novel higher-order topological states

Pan

Chen²,

et al. 2023

Preprint

View full text Add to dashboard Cite

Exploring novel topological phases of matter is one of the most fascinating research areas because they support some of the most fascinating properties for robust signal transports and wave propagations. Recently, higher-order topological insulators (HOTIs) have been introduced, and were shown to host topological corner states under the theoretical framework of Benalcazar-Bernevig-Hughes (BBH). Here we unveil some novel topological effects in HOTIs by studying the three-dimensional (3D) non-Abelian Bloch oscillations (BOs). In HOTIs, BOs with a multiplied period occur when a force with a special direction is applied due to the effect of the non-Abelian Berry curvature. Along the direction of the oscillations we find a novel higher-order topological state that goes beyond the theoretical framework of BBH. The emergence of such a higher-order topological state coincides with the appearance of the 3D non-Abelian BOs. That is, the 3D non-Abelian BOs can be used as a tool to probe novel higher-order topological states. The phenomena including the 3D non-Abelian BOs and the novel topological states are observed experimentally with designed electric circuit networks. Our work opens up a new way to detect novel topological phases theoretically and experimentally.

show abstract

Section: Based On the Above Results We Can Further Obtain Thatmentioning

confidence: 99%

Three-dimensional non-Abelian Bloch oscillations and novel higher-order topological states

Pan

Chen²,

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…As one of the most fundamental phenomena in solidstate physics, BOs were observed firstly in semiconductor superlattices 26,27 . In the following decades, BOs have been observed in various physical systems, including ultracold atoms 28,29 , Bose-Einstein condensates 30,31 , and some classical wave systems [32][33][34][35][36][37][38][39][40][41][42] . However, the experimental observation of the non-Abelian topological BOs keeps a challenge due to the strong anisotropy of the HOTI model.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, Bloch oscillations (BOs), in which a wavepacket undergoes a periodic motion in a lattice when subjected to a force [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42] , have emerged as a powerful tool for the detection of geometric and topological properties in synthetic lattice systems 43 . This is because BOs are intrinsically related to the geometric and topological properties of the underlying band structure 44 .…”

mentioning

confidence: 99%

Three-dimensional non-Abelian Bloch oscillations and higher-order topological states

Pan,

Chen,

et al. 2023

Commun Phys

View full text Add to dashboard Cite

Recently, higher-order topological insulators (HOTIs) have been introduced, and were shown to host topological corner states under the theoretical framework of Benalcazar-Bernevig-Hughes. Here we unveil some topological effects in HOTIs by studying the three-dimensional (3D) non-Abelian Bloch oscillations (BOs). In HOTIs, BOs with a multiplied period occur when a force with a special direction is applied due to the effect of the non-Abelian Berry curvature. Along the direction of the oscillations we find a higher-order topological state that goes beyond the theoretical framework of multipole moments. The emergence of such a higher-order topological state coincides with the appearance of the 3D non-Abelian BOs. That is, the 3D non-Abelian BOs can be used as a tool to probe higher-order topological states. These phenomena are observed experimentally with designed electric circuit networks. Our work opens up a way to detect topological phases theoretically and experimentally.

show abstract

“…The density matrix calculations are similar as in [21,22]. The calculations cover electron motion in k-space through acceleration by the laser electric field (intraband transitions) and dipole transitions of electrons across bands (interband transitions).…”

Section: Density Matrix Calculationsmentioning

confidence: 99%

“…Macroscopic pulse propagation is calculated similarly as in [21,22]. The unidirectional pulse propagation equation (UPPE) [37] is used.…”

Section: A4 Macroscopic Pulse Propagationmentioning

confidence: 99%

Nonlinear polarization holography of nanoscale iridium films

Hazra,

Paul,

Kim

et al. 2023

New J. Phys.

Self Cite

View full text Add to dashboard Cite

Attosecond nonlinear polarization spectroscopy refers to the subcycle-precise retrieval of the electric field of a femtosecond laser pulse together with the nonlinear polarization response that the laser pulse triggers in a sample. Here, we introduce a method that is all-optical and applicable to metal films. The method is called nonlinear polarization holography because it is based on the comparison of two time-domain holograms with and without a metal film on a substrate.The working principle can be understood as the time-domain analog of holographic interferometry, in which the comparison of two spatial holograms reveals changes in an object's size and position with interferometric precision (i.e. to fractions of the wavelength). Analogously, nonlinear polarization holography provides subcycle precision (i.e. to fractions of the optical period).Nonlinear polarization holography is used here to retrieve the time-domain nonlinear response of a nanoscale iridium film. Using density matrix calculations it is shown that the knowledge of the nonlinear response with subcycle precision allows distinguishing excitation and relaxation mechanisms of low-energetic electrons.

show abstract

Onset of Bloch oscillations in the almost-strong-field regime

Cited by 4 publications

References 33 publications

Three-dimensional non-Abelian Bloch oscillations and novel higher-order topological states

Three-dimensional non-Abelian Bloch oscillations and novel higher-order topological states

Three-dimensional non-Abelian Bloch oscillations and higher-order topological states

Nonlinear polarization holography of nanoscale iridium films

Contact Info

Product

Resources

About