Dr. Hristo T. Kisov Profile

Dr. Hristo T. Kisov

Assist. Prof. at Institute of Optical Materials and Technologies

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Publications (6)

SPIE Journal Paper | 31 May 2024

Plasmonic triple compound cavity random lasing: fabrication and characterization

Jassim Jassim, Majid Haddawi, Hristo Kisov, Seyedeh M. Hamidi

JNP, Vol. 18, Issue 02, 026006, (May 2024) https://doi.org/10.1117/12.10.1117/1.JNP.18.026006

KEYWORDS: Nanowires, Silver, Plasmonics, Dyes, Random lasers, Gold, Rhodamine B, Fabrication, Laser scattering, Laser resonators

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Proceedings Article | 29 January 2019 Paper

Comparative study on the bio-activity of hemoglobin and myoglobin as recognition materials in biosensors

G. Dyankov, Ch. Kisov, E. Belina, E. Pavlova, E. Borisova, A. Gisbrecht, D. Ivanov

Proceedings Volume 11047, 1104705 (2019) https://doi.org/10.1117/12.2516536

KEYWORDS: Carbon monoxide, Proteins, Coating, Transducers, Diffraction gratings, Biosensors, Iron, Gold, Particles, Sensors

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Apart from the huge physiological importance of hemo-, myo- globin and hemin, they play also an important role as robust and effective recognition agents in chemical and biological sensors. In this aspect the key factor in developing a reliable biosensor is the immobilization on the transducer. Usually immobilization can be produced by chemical methods, but there is frequently a need for homogeneous films of well-controlled thickness or films which can be deposited in a dry environment. The film thickness is of main importance for the optical transducer detected by Surface Plasmon Resonance (SPR) what is used in our study. Hundreds of immobilization protocols have been developed in an effort to ensure high performance sensing. All of them are focused on finding and deposition of appropriate matrices in which the recognition medium can be incorporated. However, the matrix always deteriorates the effectiveness of recognition. It seems that the best approach is to perform direct immobilization of the recognition medium. However, this is not always possible regarding the organic materials – the problem is whether the deposition retains the bioactivity of the recognition agent. On the other hand, the type of the transducer also imposes constrains. For example, the direct immobilization of the proteins is not possible for electrochemical sensors, because of the distance between the redox center and electrodes is too long. Evaluating the pros and cons of organic (protein) film deposition we have considered to study the possibility for direct immobilization of myoglobin, hemoglobin and hemin on SPR transducer. To best of our knowledge, SPR biochip with immobilized myoglobin, hemoglobin and hemin has never been constructed before. We have used spin coating, for direct immobilization and matrix-assisted pulsed-laser evaporation (MAPLE) for elaboration of the SPR biochip. The performance of both SPR chips – direct and MAPLE immobilized, was studied by SPR registration of the binding activity of myo- and hemo- globin ligands with carbon monoxide (CO), carbon dioxide (CO₂) and nitride oxide (NO).

Proceedings Article | 29 January 2019 Paper

Perspective laser medium for random lasing

Hr. Kisov, G. Dyankov, V. Strijkova, B. Georgieva, V. Serbezov

Proceedings Volume 11047, 110471J (2019) https://doi.org/10.1117/12.2516744

KEYWORDS: Random lasers, Rhodium, Laser scattering, Light scattering, Rhodamine, Polymers, Epoxies, Rhodamine B, Scattering, Photonics

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Proceedings Article | 15 March 2013 Paper

Study the penetration of IR laser radiation in human teeth: determination of the absorbed and scattered parts

Pepa Uzunova, Stanislava Rabadgiiska, Tzonko Uzunov, Hristo Kisov, Nadejda Kaimakanova, Margarita Deneva, Emil Dinkov, Marin Nenchev

Proceedings Volume 8770, 87701A (2013) https://doi.org/10.1117/12.2014113

KEYWORDS: Teeth, Laser scattering, Light scattering, Absorption, Nd:YAG lasers, Tissues, Scattering, Waveguides, Infrared lasers, Laser dentistry

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Proceedings Article | 15 March 2013 Paper

Development of a tunable, competition less flash-lamp pumped Nd:YAG laser generated of a chosen pair of two lines

Hristo Kisov, Margarita Deneva, Marin Nenchev

Proceedings Volume 8770, 87701Q (2013) https://doi.org/10.1117/12.2013695

KEYWORDS: Resonators, Prisms, Crystals, Tunable lasers, Nd:YAG lasers, Laser resonators, Q switches, Laser crystals, Q switching, Semiconductor lasers

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Proceedings Article | 8 February 2011 Paper

Susceptibility of representative dental pathogens to inactivation by the PDT with water-soluble photosensitizers

Ivan Angelov, Vanya Mantareva, Veselin Kussovski, Diter Worle, Hristo Kisov, Marieta Belcheva, Tzvetelina Georgieva, Slavcho Dimitrov

Proceedings Volume 7994, 79941A (2011) https://doi.org/10.1117/12.881011

KEYWORDS: Photodynamic therapy, Pathogens, Bacteria, Microorganisms, Oxygen, Fungi, Resistance, Dentistry, Organisms, Mouth

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