Phase-transmission-grating-based compact optofluidic refractometer

Abstract This paper presents a technique to fabricate MEMS from a novel, optically transparent polysilazane material. Polysilazane is a hybrid organic/inorganic polymeric glass that is highly transparent in the infrared to ultraviolet range and exhibits thermal stability superior to that of organic glasses such as polycarbonate and PMMA at temperatures up to 230 °C without losing optical transparency. In addition, the UV absorption of the polysilazane is closer to that of silicate glass than to pure organic polymeric glasses. This paper is the first reported work on fabricating MEMS out of this novel material, which has many potential applications in optical MEMS. The fabrication process based on casting in micro molds made photolithographically from SU8 photoresist is described, and a fundamental study of the cure depth of the polysilazane is reported. A polysilazane phase transmission grating is fabricated and demonstrated as a proof of concept optical device.

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Light controlled bending of a holographic transmission phase grating

Smart Materials and Structures ◽

10.1088/1361-665x/ac4a47 ◽

2022 ◽

Author(s):

riccardo castagna ◽

Andrea Di Donato ◽

Giuseppe Strangi ◽

Daniele Eugenio Lucchetta

Keyword(s):

Thin Film ◽

Optical Properties ◽

Light Source ◽

Visible Range ◽

Free Standing ◽

Transmission Grating ◽

Entire Structure ◽

Phase Transmission ◽

External Light Source ◽

Transmission Phase

Abstract We recorded a permanent phase transmission grating on a thin film made by using a recently developed holographic photomobile mixture. The recorded grating pitch falls in the visible range and can be optically manipulated by using an external coherent or incoherent low power light source. When the external light source illuminates the grating the entire structure bends and, as a consequence, the optical properties of the grating change. This peculiarity makes it possible to use the recorded periodic structure as an all-optically controlled free standing thin colour selector or light switch depending on the source used to illuminate the grating itself. Additionally, it could open up new possibilities for stretchable and reconfigurable holograms controlled by light as well as thin devices for optically reconfigurable dynamic communications and displays.

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COMPACT OPTOFLUIDIC REFRACTOMETER BASED ON PHASE TRANSMISSION GRATING

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194512008896 ◽

2012 ◽

Vol 19 ◽

pp. 304-310

Author(s):

FOOK SIONG CHAU ◽

HONGBIN YU ◽

GUANGYA ZHOU

Keyword(s):

Refractive Index ◽

Measurement Range ◽

Diffraction Intensity ◽

Zeroth Order ◽

Grating Structure ◽

Transmission Grating ◽

Lower Detection ◽

Working Principle ◽

Phase Transmission ◽

Higher Sensitivity

In this paper, a compact optofluidic refractometer is demonstrated. Consisting of a transmitting grating structure with rectangular grooves integrated into a microfluidic network, its working principle is based on the effect of the refractive index of a sample fluid that fills the groove space on the zeroth-order diffraction intensity. The performance of the device is dependent on grating structure parameters such as thickness. Theoretical analysis and experimental measurements agree well with each other and both demonstrate that a thicker grating results in higher sensitivity but a smaller measurement range, and vice-versa. It can also be expected that smaller changes in refractive index can be resolved by using a detector with a lower detection limit.

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Microlithography for the AXAF-I High Energy Transmission Grating Spectrometer

10.2514/6.1993-4203 ◽

1993 ◽

Author(s):

Michael McGuirk ◽

Richard Aucoin ◽

Mark Schattenberg ◽

Robert Fleming ◽

Henry Smith

Keyword(s):

High Energy ◽

Energy Transmission ◽

Transmission Grating ◽

Grating Spectrometer

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Introduction of Spectral Mapping through Transmission Grating, Derivative Technique of Photon Emission

ISTFA 2014: Conference Proceedings from the 40th International Symposium for Testing and Failure Analysis ◽

10.31399/asm.cp.istfa2014p0115 ◽

2014 ◽

Author(s):

Thierry Parrassin ◽

Sylvain Dudit ◽

Michel Vallet ◽

Antoine Reverdy ◽

Hervé Deslandes

Keyword(s):

Integrated Circuits ◽

Failure Analysis ◽

Light Emission ◽

Photon Emission ◽

Optical Path ◽

Spectral Mapping ◽

Additional Information ◽

Transmission Grating ◽

Emission System ◽

Advance Knowledge

Abstract By adding a transmission grating into the optical path of our photon emission system and after calibration, we have completed several failure analysis case studies. In some cases, additional information on the emission sites is provided, as well as understanding of the behavior of transistors that are associated to the fail site. The main application of the setup is used for finding and differentiating easily related emission spots without advance knowledge in light emission mechanisms in integrated circuits.

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