EVALUATION METHOD FOR QUANTITY OF HYDROXYL GROUPS ON INTERNAL SURFACE OF PHOTONIC-CRYSTAL WAVEGUIDE Russian patent published in 2017 - IPC G02B6/02 G02F1/01 B82Y20/00 

FIELD: nanotechnologies.

SUBSTANCE: invention may be used for evaluation of a quantity of hydroxyl groups on the internal surface of glass photonic-crystal waveguides with a hollow core (PCW with HC), as well as with selectively soldered external shells, used for production of structural components of sensors with chemical modification of their internal surface. The evaluation method of a quantity of hydroxyl groups on the internal surface of glass PCW with HC is based on the measurement of a position of local maximums of the transmittance spectrum of a PCW with HC sample and subsequent chemical modification of the internal surface up to the full saturation of the internal surface with superficial hydroxyl groups. Then, the measurement of new positions of local maximums of the transmittance spectrum of the modified sample and the building-up of a linear relationship of a position of a local maximum to a quantity of hydroxyl groups for the local maximum, which has changed its position for a larger absolute magnitude than other ones presented in the transmittance spectrum of the sample, are performed. After that, a quantity of superficial hydroxyl groups for the analogous sample according to the built-up linear relationship during the measurement of the transmittance spectrum is evaluated.

EFFECT: reducing of time for preparation of PCW with HC samples, simplicity and increasing of sensitivity of the process and usage of standard equipment for the measurement of transmittance spectra of PCW with HC.

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