Tunable narrow band optical reflector based on indirectly coupled micro ring resonators

Abstract

This paper presents a novel narrow band wavelength selective optical reflector implemented by indirectly coupling two micro ring resonators in silicon-on-insulator technology. The device is studied using an analytical model based on the transfer matrix method. With the proposed configuration, by electrically driving the integrated micro heaters, a single reflection wavelength with narrow bandwidth can be tuned. The experimental results show a good agreement with the model outcomes. The average measured reflectivity over a wavelength span of 37 nm is 0.55, with a peak of about 50 pm full-width-half-maximum, which corresponds to a quality factor of ∼30, 000. The proposed device can offer an alternative approach to realize compact reflective structures for single wavelength reflection operations in photonic integrated circuits.

Photonic structures in radiative cooling

“…Different radiation characteristics are displayed by nanophotonic structures that are close in wavelength 21,52 . Micro-resonator structure are the best in reflecting or absorbing a certain wavelength [53][54][55] . Daytime radiative coolers have been designed for exploring different nanophotonic structures, including periodic arrays, gratings, conical pillar arrays, metal-dielectric-metal resonators, multilayer pyramidal nanostructures, and dielectric resonator.…”

Recent advances and progresses in photonic devices for passive radiative cooling application: a review

“…108,109 Microresonator structures are excellent candidates to reflect or absorb a given wavelength. [110][111][112] A number of nanophotonic structures, such as conical pillar arrays, dielectric resonator metasurfaces, metal-dielectric-metal resonators, and multilayer pyramidal nanostructures, are explored to design daytime passive radiative coolers. These structures possess the capability to tailor the spectral selectivity of the surfaces.…”

A Review of Photonic Sensors Based on Ring Resonator Structures: Three Widely Used Platforms and Implications of Sensing Applications

“…A few examples are as follows: they can be utilized as narrowband filters in optical communication systems. They can be used to select or filter out specific wavelengths of light, which is useful in applications such as WDM and optical add-drop multiplexing (OADM) [ 8 ]. RRs can be used as optical modulators.…”