Selective Mode Conversion and Rainbow Trapping via Graded Elastic Waveguides

Mode conversion enables optical pulling force in photonic crystal waveguides

Acoustic rainbow trapping

NSF Nano-scale Science and Engineering Center (NSEC), 3112 Etcheverry Hall, University of California, Berkeley, California 94720, USA, School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China, Departamento de Fisica Teorica de la Materia Condensada and Condensed Matter Phy...

Exceptional points and asymmetric mode conversion in quasi-guided dual-mode optical waveguides

Non-Hermitian systems host unconventional physical effects that be used to design new optical devices. We study a non-Hermitian system consisting of 1D planar optical waveguides with suitable amount of simultaneous gain and loss. The parameter space contains an exceptional point, which can be accessed by varying the transverse gain and loss profile. When light propagates through the waveguide s...

Anomalous Selective Transparency of Many-Mode Surface-Corrugated Waveguides

We study the role of long-range correlations in random surface profiles for the transport through many-mode waveguides. It is found that the correlations that result in a perfect transmission for a single-mode case, lead to a quite unexpected phenomenon when the number of modes is large. Specifically, we show that these long-range correlations give rise to the appearance of non-interacting and ...

Broadband mode conversion via gradient index metamaterials

We propose a design for broadband waveguide mode conversion based on gradient index metamaterials (GIMs). Numerical simulations demonstrate that the zeroth order of transverse magnetic mode or the first order of transverse electric mode (TM0/TE1) can be converted into the first order of transverse magnetic mode or the second order of transverse electric mode (TM1/TE2) for a broadband of frequen...