{"id":192706,"date":"2024-01-25T12:55:23","date_gmt":"2024-01-25T07:25:23","guid":{"rendered":"https:\/\/newsmakhani.com\/?p=192706"},"modified":"2024-01-26T13:00:40","modified_gmt":"2024-01-26T07:30:40","slug":"tuning-optical-properties-of-liquid-crystals-with-a-type-of-photoactive-organic-molecule-can-give-novel-optical-devices","status":"publish","type":"post","link":"https:\/\/newsnarad.com\/pa\/tuning-optical-properties-of-liquid-crystals-with-a-type-of-photoactive-organic-molecule-can-give-novel-optical-devices\/","title":{"rendered":"Tuning optical properties of liquid crystals with a type of photoactive organic molecule can give novel optical devices"},"content":{"rendered":"

\u0a2e\u0a3e\u0a2b\u0a3c \u0a15\u0a30\u0a28\u0a3e, \u0a07\u0a39 \u0a16\u0a2c\u0a30 \u0a24\u0a41\u0a39\u0a3e\u0a21\u0a40 \u0a2c\u0a47\u0a28\u0a24\u0a40 \u0a2d\u0a3e\u0a38\u0a3c\u0a3e \u0a35\u0a3f\u0a71\u0a1a \u0a09\u0a2a\u0a32\u0a2c\u0a27 \u0a28\u0a39\u0a40\u0a02 \u0a39\u0a48\u0964 \u0a15\u0a3f\u0a30\u0a2a\u0a3e \u0a15\u0a30\u0a15\u0a47 \u0a07\u0a71\u0a25\u0a47 \u0a26\u0a47\u0a16\u0a4b\u0964<\/a><\/p>

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Delhi: 25 JAN 2024\u00a0<\/strong><\/p>\n<\/div>\n

Scientists have tuned the disallowed bands of wavelength in liquid crystals by it doping it with a type of organic molecule which are photoactive dimers, introducing properties that can be useful for new generational optical devices.<\/p>\n

Owing to their ability to modulate light, there has been growing interest in photonic crystals (PCs) for developing new-generation optical devices. The periodic dielectric structure of PCs gives rise to disallowed bands of wavelength or photonic bandgap (PBG). The bandgap corresponds to the frequencies\/wavelengths of electromagnetic radiation that are not transmitted through the material. Among various PBG structures, liquid crystals (LCs), where molecules self-organize into a periodic structure, are gaining attention due to their capability to self-assemble. Liquid systems exhibit PBG structures in two phases\u2014namely the cholesteric (Ch) phase and the twist grain boundary smectic C* (TGBC*) phase, displaying periodic structures in one and three dimensions, respectively. The PBG properties of these systems can be easily altered by external stimuli like temperature, doping with nanoparticles, etc.<\/p>\n

Scientists from the Centre for Nano and Soft Matter Sciences (CeNS), an autonomous institute under the Department of Science & Technology (DST), have demonstrated the impact of ultraviolet light on the one-dimensional and three-dimensional PBG features of the LC systems.<\/p>\n

By incorporating small amounts of guest photoactive organic compounds with a structure containing two identical or similar units (dimers), the wavelength and the width of the PBG in 1 or 3-dimensions could be tuned in the presence of UV light.<\/p>\n

The observed feature can find application as a selective wavelength mirror whose wavelength can be optically tuned.\u00a0 Another interesting fact is the memory effect observed in two-dimensional PBG dictated by UV or actinic light, a feature holding promise for memory devices.\u00a0 This research work published in \u2018Journal of Molecular Liquids <\/em>was performed by \u00a0Rajalaxmi Sahoo, Reshma C., D.S. Shankar Rao, C.V. Yelamaggad, and S. Krishna Prasad.<\/p>","protected":false},"excerpt":{"rendered":"

\u0a2e\u0a3e\u0a2b\u0a3c \u0a15\u0a30\u0a28\u0a3e, \u0a07\u0a39 \u0a16\u0a2c\u0a30 \u0a24\u0a41\u0a39\u0a3e\u0a21\u0a40 \u0a2c\u0a47\u0a28\u0a24\u0a40 \u0a2d\u0a3e\u0a38\u0a3c\u0a3e \u0a35\u0a3f\u0a71\u0a1a \u0a09\u0a2a\u0a32\u0a2c\u0a27 \u0a28\u0a39\u0a40\u0a02 \u0a39\u0a48\u0964 \u0a15\u0a3f\u0a30\u0a2a\u0a3e \u0a15\u0a30\u0a15\u0a47 \u0a07\u0a71\u0a25\u0a47 \u0a26\u0a47\u0a16\u0a4b\u0964 Delhi: 25 JAN 2024\u00a0 Scientists have tuned the disallowed bands of wavelength in liquid crystals by it doping it with a type of organic molecule which are photoactive dimers, introducing properties that can be useful for new generational optical devices. […]<\/p>\n","protected":false},"author":18,"featured_media":192707,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[109,122],"tags":[105668,105667,105666,56731,105664,105665],"class_list":{"0":"post-192706","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-national","8":"category-news","9":"tag-and-s-krishna-prasad","10":"tag-c-v-yelamaggad","11":"tag-d-s-shankar-rao","12":"tag-news-makhani","13":"tag-rajalaxmi-sahoo","14":"tag-reshma-c"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/newsnarad.com\/pa\/wp-json\/wp\/v2\/posts\/192706","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/newsnarad.com\/pa\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/newsnarad.com\/pa\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/newsnarad.com\/pa\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/newsnarad.com\/pa\/wp-json\/wp\/v2\/comments?post=192706"}],"version-history":[{"count":0,"href":"https:\/\/newsnarad.com\/pa\/wp-json\/wp\/v2\/posts\/192706\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/newsnarad.com\/pa\/wp-json\/wp\/v2\/media\/192707"}],"wp:attachment":[{"href":"https:\/\/newsnarad.com\/pa\/wp-json\/wp\/v2\/media?parent=192706"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/newsnarad.com\/pa\/wp-json\/wp\/v2\/categories?post=192706"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/newsnarad.com\/pa\/wp-json\/wp\/v2\/tags?post=192706"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}