Unitary control of multiport wave transmission
Cheng Guo, David A. B. Miller, Shanhui Fan

TL;DR
This paper develops a theoretical framework for applying unitary control to manipulate multiport wave transmission, enabling uniform and symmetric transmission properties across complex media, with promising applications in photonics.
Contribution
It introduces a detailed theory of unitary control for wave transmission, addressing achievable transmission levels and control configurations, advancing wavefront shaping techniques.
Findings
Unitary control can achieve uniform total and direct transmittance.
Reciprocity and energy conservation impose symmetry constraints.
The theory applies to various media and wave types.
Abstract
Controlling wave transmission is crucial for various applications. In this work, we apply the concept of unitary control to manipulate multiport wave transmission. Unitary control aims to control the behaviors of a set of orthogonal waves simultaneously. The approach fully harnesses the capability of wavefront shaping techniques, with promising applications in communication, imaging, and photonic integrated circuits. Here we present a detailed theory of unitary control of wave transmission, focusing on two key characteristics: total (power) transmittance and direct (field) transmission. The total transmittance for an input port represents the fraction of total transmitted power with respect to the input power for wave incident from an input port. The direct transmission for an input port denotes the complex transmission amplitude from that input port to its corresponding output port. We…
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Taxonomy
TopicsGyrotron and Vacuum Electronics Research
