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One of the key features of lasers operating near exceptional points (EPs) is that the gain medium can support an oscillating population inversion above a pump threshold, leading to self-modulated laser dynamics. This unusual behavior opens up new pos
Externí odkaz:
http://arxiv.org/abs/2412.12066
Autor:
McIntosh, Rohin E., Goetschy, Arthur, Bender, Nicholas, Yamilov, Alexey, Hsu, Chia Wei, Yilmaz, Hasan, Cao, Hui
The maximum deposition eigenchannel provides the largest possible power delivery to a target region inside a diffusive medium by optimizing the incident wavefront of a monochromatic beam. It originates from constructive interference of scattered wave
Externí odkaz:
http://arxiv.org/abs/2411.05339
The recovery of businesses after a disaster is vital to community economic resilience, yet the network dynamics influencing the speed and spillover effects of recovery remain poorly understood. Understanding these dynamics is essential for characteri
Externí odkaz:
http://arxiv.org/abs/2409.12357
Publikováno v:
Nanophotonics, Vol 10, Iss 1, Pp 343-360 (2020)
We outline and interpret a recently developed theory of impedance matching or reflectionless excitation of arbitrary finite photonic structures in any dimension. The theory includes both the case of guided wave and free-space excitation. It describes
Externí odkaz:
https://doaj.org/article/a172f02989fa42af8586beacc1b0e581
Wavefront shaping can tailor multipath interference to control multiple scattering of waves in complex optical systems. However, full-wave simulations that capture multiple scattering are computationally demanding given the large system size and the
Externí odkaz:
http://arxiv.org/abs/2406.09342
Autor:
Lin, Ho-Chun, Hsu, Chia Wei
A striking prediction from the random matrix theory in mesoscopic physics is the existence of "open channels": waves that can use multipath interference to achieve perfect transmission across an opaque disordered medium even in the multiple-scatterin
Externí odkaz:
http://arxiv.org/abs/2406.06727
Publikováno v:
Optica 11, 454-459 (2024)
Theoretical bounds are commonly used to assess the limitations of photonic design. Here we introduce a more active way to use theoretical bounds, integrating them into part of the design process and identifying optimal system parameters that maximize
Externí odkaz:
http://arxiv.org/abs/2311.13592
Publikováno v:
Nat Commun 15, 8618 (2024)
Exceptional points (EPs) -- singularities in the parameter space of non-Hermitian systems where two nearby eigenmodes coalesce -- feature unique properties with applications such as sensitivity enhancement and chiral emission. Existing realizations o
Externí odkaz:
http://arxiv.org/abs/2310.14643
Autor:
Hsu, Chia-Wei, Mostafavi, Ali
Despite recognition of the relationship between infrastructure resilience and community recovery, very limited empirical evidence exists regarding the extent to which the disruptions in and restoration of infrastructure services contribute to the spe
Externí odkaz:
http://arxiv.org/abs/2309.10118
Autor:
McIntosh, Rohin, Goetschy, Arthur, Bender, Nicholas, Yamilov, Alexey, Hsu, Chia Wei, Yilmaz, Hasan, Cao, Hui
Publikováno v:
Nature Photonics (2024)
Wavefront shaping enables targeted delivery of coherent light into random-scattering media, such as biological tissue, by constructive interference of scattered waves. However, broadband waves have short coherence times, weakening the interference ef
Externí odkaz:
http://arxiv.org/abs/2309.09376