Responsive photonische Kristalle

Abstract

Dieser Aufsatz fasst jüngste Entwicklung auf dem Gebiet der responsiven photonischen Kristalle zusammen, einschließlich Design‐, Fertigungs‐ und Anwendungsstrategien, z. B. als optische Schalter oder chemische und biologische Sensoren. Eine Reihe von Fertigungsmethoden für responsive photonische Strukturen ist heute verfügbar, die hauptsächlich auf Selbstorganisationsprozessen beruhen. Gegenüber Mikrofertigungsverfahren besitzen diese Ansätze die Vorteile geringerer Prozesskosten und einer besseren Produktionseffizienz, es gibt aber noch beträchtliche Herausforderungen zu bewältigen. Einige Techniken wie Schleuderbeschichtung, magnetische Aggregation und durchflussinduzierte Selbstorganisation erweisen sich hier als vielversprechend. Entscheidende Hinweise für den Entwurf neuer, verbesserter Systeme könnte das Vorbild natürlicher photonischer Strukturen bieten.

Mechanochromic Photonic‐Crystal Fibers Based on Continuous Sheets of Aligned Carbon Nanotubes

“…Chromatic transitions in response to light, temperature, chemical species, mechanical deformation, electricity, and magnetic fields have been extensively investigated. [3][4][5][6][7][8] However, the conventional film shape of chromatic materials and devices can hardly live up to the requirements for many applications, such as portable and wearable electronics. To this end, the use of fibers may represent a promising strategy as fibers can be woven into lightweight fabrics with another unique advantage, namely good breathability.…”

Electroresponsive Structurally Colored Materials: A Combination of Structural and Electrochromic Effects

“…[1,2] These materials differ from traditional composites in which the constituents are combined on amacroscopic level. [6,7] In addition, the structural color can be dynamically manipulated by external sources such as electrical, [8] chemical, [9] thermal, [10] or mechanical stimuli, [11] and therefore al arge number of stimuli-responsive photonic crystals have been developed in recent years. [3][4][5] Ap hotonic crystal is ap eriodic optical nanostructure; such crystals are commonly applied as structurally colored materials.Because the structural color imparted by aphotonic crystal is generated based on ad ifferent principle from the color obtained from ap igment, these crystals have been widely studied as new sources of color.…”

“…[3][4][5] Ap hotonic crystal is ap eriodic optical nanostructure; such crystals are commonly applied as structurally colored materials.Because the structural color imparted by aphotonic crystal is generated based on ad ifferent principle from the color obtained from ap igment, these crystals have been widely studied as new sources of color. [6,7] In addition, the structural color can be dynamically manipulated by external sources such as electrical, [8] chemical, [9] thermal, [10] or mechanical stimuli, [11] and therefore al arge number of stimuli-responsive photonic crystals have been developed in recent years. [12,13] However, most of their color manipulation is based on the modification of the periodicity of the photonic crystals with external stimuli.…”

Bio‐Inspired Photonic‐Crystal Microchip for Fluorescent Ultratrace Detection

“…Photonic crystals (PCs), which are dielectric materials with periodic modulation of the refractive index and photonic band-gap properties, [7] have made possible sensitive detection of ions, [8] DNA, [9] proteins, [10] and other molecules [11] at comparatively low concentrations. Especially, based on the fluorescence enhancement effect, a PC device could achieve hundred-fold enhancement of sensitivity.…”