118 citations · 370 across the 9 of their papers we have counts for
9 papers
Impact of cavity geometry on microlaser dynamics
Kyungduk Kim, Stefan Bittner, Yuhao Jin +3
We experimentally investigate spatio-temporal lasing dynamics in semiconductor microcavities with various geometries, featuring integrable or chaotic ray dynamics. The classical ra…
Spatio-temporal lasing dynamics in a Limaçon-shaped microcavity
Kyungduk Kim, Stefan Bittner, Yuhao Jin +3
Limaçon-shaped microdisk lasers are promising on-chip light sources with low lasing threshold and unidirectional output. We conduct an experimental study on the lasing dynamics of…
Sensitive control of broad-area semiconductor lasers by cavity shape
Kyungduk Kim, Stefan Bittner, Yuhao Jin +5
The ray dynamics of optical cavities exhibits bifurcation points: special geometries at which ray trajectories switch abruptly between stable and unstable. A prominent example is t…
Single-mode lasing based on PT-breaking of two-dimensional photonic higher-order topological insulator
B. F. Zhu, Q. Wang, Y. Q. Zeng +2
Topological lasers are a new class of lasers that seek to exploit the special properties of topological states of light. A typical limiting factor in their performance is the exist…
Massively parallel ultrafast random bit generation with a chip-scale laser
Kyungduk Kim, Stefan Bittner, Yongquan Zeng +4
Random numbers are widely used for information security, cryptography, stochastic modeling, and quantum simulations. Key technical challenges for physical random number generation…
Spatial structure of lasing modes in wave-chaotic semiconductor microcavities
Stefan Bittner, Kyungduk Kim, Yongquan Zeng +2
We present experimental and numerical studies of broad-area semiconductor lasers with chaotic ray dynamics. The emission intensity distributions at the cavity boundaries are measur…
Multimode Lasing in Wave-Chaotic Semiconductor Microlasers
Alexander Cerjan, Stefan Bittner, Marius Constantin +5
We investigate experimentally and theoretically the lasing behavior of dielectric microcavity lasers with chaotic ray dynamics. Experiments show multimode lasing for both D-shaped…
Electrically pumped semiconductor laser with low spatial coherence and directional emission
Kyungduk Kim, Stefan Bittner, Yongquan Zeng +3
We design and fabricate an on-chip laser source that produces a directional beam with low spatial coherence. The lasing modes are based on the axial orbit in a stable cavity and ha…
Suppressing spatio-temporal lasing instabilities with wave-chaotic microcavities
Stefan Bittner, Stefano Guazzotti, Yongquan Zeng +7
Spatio-temporal instabilities are widespread phenomena resulting from complexity and nonlinearity. In broad-area edge-emitting semiconductor lasers, the nonlinear interactions of m…