118 citations · 456 across the 11 of their papers we have counts for
12 papers · 1 filter
Three-Wave Mixing as a High-Throughput Diagnostic Tool for Nonlinear Waveguides
Yi-Yang Liu, Kevin Chen, Kyungduk Kim +4
The recent development of wavelength-scale nonlinear waveguides highlights the need for new diagnostic methods that characterize both waveguide dispersion and fabrication-induced s…
Nonlinear optical encoding enabled by recurrent linear scattering
Fei Xia, Kyungduk Kim, Yaniv Eliezer +4
Optical information processing and computing can potentially offer enhanced performance, scalability and energy efficiency. However, achieving nonlinearity-a critical component of…
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…
Parallel random LiDAR with spatial multiplexing of a many-mode laser
Kyungduk Kim, Yaniv Eliezer, Olivier Spitz +1
We propose and experimentally demonstrate parallel LiDAR using random intensity fluctuations from a highly multimode laser. We optimize a degenerate cavity to have many spatial mod…
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…
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…
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…
Universal sensitivity of speckle intensity correlations to wavefront change in light diffusers
KyungDuk Kim, HyeonSeung Yu, KyeoReh Lee +1
Here, we present a concept based on the realization that a complex medium can be used as a simple interferometer. Changes in the wavefront of an incident coherent beam can be retri…
Remote sensing of pressure inside deformable microchannels using light scattering in Scotch tape
Kyungduk Kim, Hyeonseung Yu, Joonyoung Koh +3
We present a simple but effective method to measure the pressure inside a deformable micro-channel using laser scattering in a translucent Scotch tape. Our idea exploits the fact t…