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Display device having plasmonic color filters and photovoltaic capabilities

A technology for plasma and display equipment, applied in the fields of filters, instruments, optics, etc., can solve problems such as light waste

Inactive Publication Date: 2013-01-09
RGT UNIV OF MICHIGAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polarizers currently used in LCD displays perform the polarization function by absorbing orthogonally polarized light and the absorbed light is also wasted

Method used

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  • Display device having plasmonic color filters and photovoltaic capabilities
  • Display device having plasmonic color filters and photovoltaic capabilities
  • Display device having plasmonic color filters and photovoltaic capabilities

Examples

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example 1

[0110] Gold nanogratings were fabricated as follows: Three types of large-area Au nanogratings with different periods (420 nm, 280 nm, and 220 nm) were fabricated by nanoimprint lithography (NIL-based) process. On a spin-cast MRI-8030 photoresist (Microresist Technology GmbH) on a glass substrate, at a pressure of 600 psi and a temperature of 180 °C for 5 min, SiO with a duty cycle of 0.7 2 Dies were NIL performed in a Nanonex NX 2000 nanoimprinter (Princeton, NJ). After cooling, the mold was demolded, and Ti was selectively deposited on each sidewall of the embossed grating structure by angled deposition. Ti deposited onto the photoresist pattern, in O 2 The barb structure is induced during reactive ion etching (RIE), which facilitates the lift-off process. o 2 RIE (20 sccm O 2 , 12mTorr chamber pressure and 30W bias power), deposit 40nm Au and 1nm Ti, use electron beam evaporator and lift-off process to complete the fabrication of Au nano-grating structure on the substra...

example 2

[0114] Plasmonic nanoresonator devices for color filtering, as above Figure 10A As discussed in , is formed as follows. For ease of manufacture, the device is designed to operate on magnesium fluoride (MgF 2 ) Subwavelength periodic MIM stack arrays on transparent films. Glass substrates are prepared using a clean process. Using an electron beam evaporator, at 0.5nms -1 At a deposition rate of 220nm magnesium fluoride layer (MgF 2 ), 40nm of Al, 100nm of zinc selenide (ZnSe) and another 40nm of Al. To prevent the oxidation of Al, the samples were stored in an oxygen-free glove box before measurement. For each stack, a 100nm thick zinc selenide (ZnSe) dielectric layer is sandwiched between two 40nm thick aluminum (Al) grating layers. The duty cycle of the stacked array is about 0.7.

[0115] Patterned and milled using a focused ion beam in a Nova NanoLab DuaLbeam workstation (FEI). Milling is controlled using an automated FIB program provided by FEI that controls all r...

example 3

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PUM

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Abstract

A plasmonic optical spectrum filtering device is provided that filters electromagnetic waves by optical resonance, for example, by selective conversion between the free-space waves and spatially confined modes in plasmonic nano-resonators. Frequency-selective transmission and reflection spectra are engineered and can be used as spectrum filters for display and imaging applications. A thin film stack color filter is further disclosed, which can be designed to either function as a transmission color filter with efficiency twice that of conventional colorant based color filter; or as a reflective color filter for display devices (e.g., used in an energy harvesting reflective display). In other variations, a novel reflective colored display is viewable under direct sunlight, and can simultaneously harvest both incident light and generate electrical power.; Methods of making such plamonic optical spectrum filtering devices are also provided.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Utility Patent Application No. 13 / 095,365, filed April 27, 2011, and U.S. Provisional Patent Application No. 61 / 328,335, filed April 27, 2010 . The entire content of the above application is incorporated herein by reference. technical field [0003] The invention relates to spectral filtering devices for display devices such as liquid crystal displays, projection displays such as liquid crystal on silicon (LCoS), eyeglass displays, and plasmonic color filters, which spectral filtering devices may also have photovoltaic properties. Background technique [0004] This section provides background information related to the present invention which is not necessarily prior art. [0005] In a large number of computing devices, display devices occupy an increasing portion of the surface area. Energy efficiency is becoming increasingly important for a green and sustainable future. As...

Claims

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Application Information

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IPC IPC(8): G02B5/20G02F1/1335
CPCG02F2203/10G02B5/008G02B5/288G02F2001/13324G02F1/133533G02F1/133516G02F1/13439G02F1/13324G02B5/20G02F1/1335
Inventor 郭凌杰徐挺
Owner RGT UNIV OF MICHIGAN
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