@article{MTMT:2651040, title = {Two-point-separation in a sub-micron nonscanning IR super-resolution microscope based on transient fluorescence detected IR spectroscopy}, url = {https://m2.mtmt.hu/api/publication/2651040}, author = {Inoue, K and Bokor, Nándor and Kogure, S and Fujii, M and Sakai, M}, doi = {10.1364/OE.17.012013}, journal-iso = {OPT EXPRESS}, journal = {OPTICS EXPRESS}, volume = {17}, unique-id = {2651040}, issn = {1094-4087}, abstract = {IR absorption of chemical species in microscopic objects such as biological cells cannot be measured by conventional IR microscopes, because of their low resolution. To overcome this problem, we developed a novel far-field IR super-resolution microscope employing transient fluorescence detected IR spectroscopy. The resolution of this microscope was shown to be 880 nm by measuring the image of 1 mu m fluorescent beads. Furthermore, it succeeded in resolving beads located 1.4 mu m apart from each other. This is considerably smaller than the diffraction limit of the applied IR light (3.4 mu m). These results suggest the capability of our microscope to study sub-micron targets such as sub-cellular structures of biological cells. (C) 2009 Optical Society of America}, year = {2009}, pages = {12013-12018} } @article{MTMT:2642787, title = {Investigation of polarization effects for high-numerical-aperture first-order Laguerre-Gaussian beams by 2D scanning with a single fluorescent microbead}, url = {https://m2.mtmt.hu/api/publication/2642787}, author = {Bokor, Nándor and Iketaki, Y and Watanabe, T and Fujii, M}, doi = {10.1364/OPEX.13.010440}, journal-iso = {OPT EXPRESS}, journal = {OPTICS EXPRESS}, volume = {13}, unique-id = {2642787}, issn = {1094-4087}, abstract = {The focal intensity distribution of strongly focused (NA=0.9) first-order Laguerre-Gaussian doughnut beams is investigated experimentally for three different polarizations: linear, and left-handed circular and right-handed circular. The investigations are done by 2-dimensional scanning the focal plane with of a 100nm diameter fluorescent microbead, and measuring the fluorescence signal. The results are shown to be in excellent agreement with theoretical predictions, and demonstrate the superiority of one of the circular polarizations to achieve a sharp dark central spot. (c) 2005 Optical Society of America.}, year = {2005}, pages = {10440-10447} } @article{MTMT:144529, title = {Observation volumes and gamma factors in two-photon fluorescence fluctuation spectroscopy}, url = {https://m2.mtmt.hu/api/publication/144529}, author = {Nagy, Attila Tibor and Wu, J and Berland, KM}, doi = {10.1529/biophysj.104.052779}, journal-iso = {BIOPHYS J}, journal = {BIOPHYSICAL JOURNAL}, volume = {89}, unique-id = {144529}, issn = {0006-3495}, year = {2005}, eissn = {1542-0086}, pages = {2077-2090}, orcid-numbers = {Nagy, Attila Tibor/0000-0003-4595-3625} }