Active narrowband filter based on 2.5D metasurface from Ge2Sb2Te5

Abstract We propose a new concept of an active narrowband filter based on a 2.5D metasurface from Ge2Sb2Te5 (GST). In this paper, we present a numerical calculation of the transmission spectrum from a structure of ellipsoids of revolution. For this 2.5D metasurface, modulation of narrow peaks in the IR range for s- and p-polarization is shown. A manufacturing technique using two-photon lithography and laser electrodispersion is proposed.

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Theoretical analysis and numerical calculation for the transmission spectrum of long-period fiber gratings with a rectangular index modulation

Acta Physica Sinica ◽

10.7498/aps.52.96 ◽

2003 ◽

Vol 52 (1) ◽

pp. 96

Author(s):

Xu Xin Hua ◽

Cui Yi Ping

Keyword(s):

Numerical Calculation ◽

Theoretical Analysis ◽

Transmission Spectrum ◽

Fiber Gratings ◽

Long Period ◽

Long Period Fiber Gratings ◽

Index Modulation

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Research of Subwavelength Metal Hole Arrays Used for Surface Plasmon Resonance Sense

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.590.411 ◽

2012 ◽

Vol 590 ◽

pp. 411-415

Author(s):

Ying Ying Zhang

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Surface Plasmon Resonance ◽

Numerical Calculation ◽

Surface Plasmon ◽

Transmission Spectrum ◽

Measuring Range ◽

Element Analysis ◽

Spr Sensor ◽

Hole Arrays

In this paper, a new structure with square metal hole arrays was devised for SPR sense, and it was optimized by numerical calculation based on finite element analysis. After optimization, a very narrow SPR peak, which is just tenth of the conventional SPR sensor, can be obtained in the transmission spectrum. Besides, the linear measuring range is more than 0.4 RIU. Consequently, the newly designed structure will be benefit for the ability of resist noise and resolution.

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NEW PROSPECTS OF APPLICATION OF LIQUID CRYSTAL POLYMER CANTILEVER

Proceedings of the YSU A: Physical and Mathematical Sciences ◽

10.46991/pysu:a/2020.54.3.165 ◽

2020 ◽

Vol 54 (3 (253)) ◽

pp. 165-171

Author(s):

H.L. Margaryan ◽

N.H. Hakobyan ◽

V.K. Abrahamyan ◽

P.K. Gasparyan ◽

A.S. Yeremyan ◽

...

Keyword(s):

Liquid Crystal ◽

Laser Radiation ◽

Femtosecond Laser ◽

Liquid Crystal Polymer ◽

Two Photon ◽

Manufacturing Technique ◽

Crystal Polymer ◽

Azobenzene Polymer ◽

Sensitive Sensor ◽

Prospects Of Application

The manufacturing technique of a millimetric sizes cantilever from photo-driven azobenzene polymer is described. The cantilever oscillations under the influence of laser radiation are studied. The possibility of making a micron-sized cantilever by a femtosecond laser initiated two-photon polymerization technique is shown. Such cantilever can become the basis for a high sensitive sensor, controlled directly by light.

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Two-photon excitation microscopy in cellular biophysics

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100136684 ◽

1995 ◽

Vol 53 ◽

pp. 62-63

Author(s):

David W. Piston ◽

Brian D. Bennett ◽

Robert G. Summers

Keyword(s):

Confocal Microscopy ◽

Laser Beam ◽

Duty Cycle ◽

Excited Electronic State ◽

Input Power ◽

Two Photon ◽

Simultaneous Absorption ◽

Photon Excitation ◽

Very High ◽

Two Photon Excitation

Two-photon excitation microscopy (TPEM) provides attractive advantages over confocal microscopy for three-dimensionally resolved fluorescence imaging and photochemistry. Two-photon excitation arises from the simultaneous absorption of two photons in a single quantitized event whose probability is proportional to the square of the instantaneous intensity. For example, two red photons can cause the transition to an excited electronic state normally reached by absorption in the ultraviolet. In practice, two-photon excitation is made possible by the very high local instantaneous intensity provided by a combination of diffraction-limited focusing of a single laser beam in the microscope and the temporal concentration of 100 femtosecond pulses generated by a mode-locked laser. Resultant peak excitation intensities are 106 times greater than the CW intensities used in confocal microscopy, but the pulse duty cycle of 10-5 maintains the average input power on the order of 10 mW, only slightly greater than the power normally used in confocal microscopy.

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Two-photon excitation fluorescence microscopy in living systems

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100146618 ◽

1993 ◽

Vol 51 ◽

pp. 154-155 ◽

Cited By ~ 1

Author(s):

David W. Piston

Keyword(s):

Confocal Microscopy ◽

Fluorescence Microscopy ◽

Singlet State ◽

Excited Electronic State ◽

Input Power ◽

Two Photon ◽

Simultaneous Absorption ◽

Photon Excitation ◽

Very High ◽

Two Photon Excitation

Two-photon excitation fluorescence microscopy provides attractive advantages over confocal microscopy for three-dimensionally resolved fluorescence imaging. Two-photon excitation arises from the simultaneous absorption of two photons in a single quantitized event whose probability is proportional to the square of the instantaneous intensity. For example, two red photons can cause the transition to an excited electronic state normally reached by absorption in the ultraviolet. In our fluorescence experiments, the final excited state is the same singlet state that is populated during a conventional fluorescence experiment. Thus, the fluorophore exhibits the same emission properties (e.g. wavelength shifts, environmental sensitivity) used in typical biological microscopy studies. In practice, two-photon excitation is made possible by the very high local instantaneous intensity provided by a combination of diffraction-limited focusing of a single laser beam in the microscope and the temporal concentration of 100 femtosecond pulses generated by a mode-locked laser. Resultant peak excitation intensities are 106 times greater than the CW intensities used in confocal microscopy, but the pulse duty cycle of 10−5 maintains the average input power on the order of 10 mW, only slightly greater than the power normally used in confocal microscopy.

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