Telluride glasses for far infrared photonic applications

Abstract

International audienceTelluride glasses possess the widest infrared window of all amorphous materials and are key to a number of long-wavelength applications such as bio-sensing. However they are not intrinsically good glass formers and require significant materials engineering for device fabrication. Strategies for stable glass engineering are presented and the fabrication of far infrared optical fibers is described. A new type of optical sensor based on electrophoretic capture of protein is also presented. This sensor is based on a conducting telluride glass which can act as both a capture electrode and an infrared optical element for collecting vibrational signatures of target molecules such as proteins

Integrated photonics for infrared spectroscopic sensing

“…The amorphous chalcogenide compounds, i.e. chalcogenide glasses (ChGs) are known for their broadband transparency covering the entire mid-IR band, high and continuously tunable refractive indices (n ~ 2 to 3.5), and large Kerr nonlinearity [31][32][33][34][35][36][37][38][39][40]. In addition to their exceptional optical properties, ChG's are also uniquely poised for mid-IR multimaterial photonic integration.…”

Оптические свойства халькогенидных сплавов на основе теллура в дальнем инфракрасном диапазоне (lambda>30 мкм)

“…Активное применение инфракрасных (ИК) волоконных светово-дов для оптической связи, медицины и экологии далее показало, что именно халькогенидные сплавы (ХС) являются наиболее перспективным материалом, работа-ющим с ИК излучением. Для волоконной оптики были синтезированы ХС: As−S, As−Se, As−S−Se, Ge−S, Ge−Se, Ge−As−S, As−Se−Te, Ge−As−Se, Ge−Se−Te, Ga−La−S и Ge(Ga)−Sb−S систем [3][4][5]. Устойчи-вый интерес к технологии получения и исследованию физико-химических свойств ХС сохраняется до сих пор.…”

Laser Desorption Ionization Time‐of‐Flight Mass Spectrometry of Glasses and Amorphous Films from Ge–As–Se System

“…Particularly interesting for optical applications is the good transparency of chalcogenide glasses in the mid-infrared spectral region combined with their high linear and nonlinear refractive indices. [1][2][3] Various techniques are known and used to synthesize the amorphous chalcogenides in different forms like bulk glasses, optical fibers, and thin films. 1,4 Among the chalcogenide glasses, the Ge-As-Se ternary system presents some attractive characteristics, such as one of the broadest glass-forming regions of any of the chalcogenides, relatively easy fabrication in A c c e p t e d m a n u s c r i p t bulk form, wide range of glass transition temperature (Tg), and high nonlinear refractive index.…”