TY  - JOUR
AU  - Inoue, K
AU  - Bokor, Nándor
AU  - Kogure, S
AU  - Fujii, M
AU  - Sakai, M
TI  - Two-point-separation in a sub-micron nonscanning IR super-resolution microscope based on transient fluorescence detected IR spectroscopy
JF  - OPTICS EXPRESS
J2  - OPT EXPRESS
VL  - 17
PY  - 2009
IS  - 14
SP  - 12013
EP  - 12018
PG  - 6
SN  - 1094-4087
DO  - 10.1364/OE.17.012013
UR  - https://m2.mtmt.hu/api/publication/2651040
ID  - 2651040
AB  - 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
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Bokor, Nándor
AU  - Iketaki, Y
AU  - Watanabe, T
AU  - Fujii, M
TI  - Investigation of polarization effects for high-numerical-aperture first-order Laguerre-Gaussian beams by 2D scanning with a single fluorescent microbead
JF  - OPTICS EXPRESS
J2  - OPT EXPRESS
VL  - 13
PY  - 2005
IS  - 26
SP  - 10440
EP  - 10447
PG  - 8
SN  - 1094-4087
DO  - 10.1364/OPEX.13.010440
UR  - https://m2.mtmt.hu/api/publication/2642787
ID  - 2642787
N1  - Department of Physics, Budapest University of Technology and Economics, Budapest 1111, Hungary            
            Olympus Co., Ltd., 2-3 Kuboyama-cho, Hachioji-shi 192-8512, Japan            
            Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan            
            Cited By :62            
            Export Date: 11 May 2021            
            Correspondence Address: Bokor, N.; Department of Physics, Budapest University of Technology and Economics, Budapest 1111, Hungary; email: nandor.bokor@weizmann.ac.il
AB  - 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.
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Nagy, Attila Tibor
AU  - Wu, J
AU  - Berland, KM
TI  - Observation volumes and gamma factors in two-photon fluorescence fluctuation spectroscopy
JF  - BIOPHYSICAL JOURNAL
J2  - BIOPHYS J
VL  - 89
PY  - 2005
IS  - 3
SP  - 2077
EP  - 2090
PG  - 14
SN  - 0006-3495
DO  - 10.1529/biophysj.104.052779
UR  - https://m2.mtmt.hu/api/publication/144529
ID  - 144529
LA  - English
DB  - MTMT
ER  -