Patent classifications
G
PHYSICS
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G02
OPTICS
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G02F
OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
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1/00
Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
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G02F1/01
for the control of the intensity, phase, polarisation or colour
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G02F1/015
based on semiconductor elements having potential barriers, e.g. having a PN or PIN junction
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G02F1/0155
modulating the optical absorption
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G02F1/0156
using free carrier absorption
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G02F1/0156

Optical absorber
09594265 · 2017-03-14 · ·

The invention relates to an optical absorber comprising a semiconductor micro or nano scale structured array configured for transmission of electromagnetic (EM) radiation when in a passive state and for absorption and/or reflection of electromagnetic (EM) radiation when in an active state. The absorber also includes an activator arranged to inject free carriers into the structured array to activate said array on demand.