Results 11 to 20 of about 1,251,586 (168)

Mid-IR diffraction gratings fabricated via nanoimprint lithography for chirped pulse amplification [PDF]

Discover Nano
Lasers emitting in the 2 μm spectral region have attracted considerable attention in recent years owing to their wide-ranging applications in science and industry, including the detection of atmospheric constituents like H2O, surgical procedures in ...
Giovanna Capraro, Danish Bashir, Michael Möller, Florian Schlachter, Jens Bolten, Thomas Graf, Marwan Abdou Ahmed, Max C. Lemme   +7 more
doaj   +2 more sources

Low Threshold Vertical Cavity Surface Emitting Lasers Based on CsPbI3 Thin Films [PDF]

Advanced Science, EarlyView.
The first vertical‐cavity surface‐emitting laser (VCSEL) based on CsPbI3 thin films is fabricated by planar hot pressing. By optimizing the cavity design through optical gain assessment and rigorous coupled‐wave analysis, the VCSEL achieved an exceptionally low lasing threshold of 2.8 µJ cm−2.
Naho Kurahashi, Maximilian Schiffer, Cedric Kreusel, Christian Tückmantel, Ahmed Kadid, Habib Ur Rehman, Florian Gaschler, René Anfang, Christopher Knoth, Maximilian Buchmüller, Patrick Görrn, Thomas Riedl   +11 more
wiley   +2 more sources

High‐Isolation Nonreciprocal Sawtooth Grating via Quasi‐Bound States in the Continuum [PDF]

Nanophotonics, Volume 15, Issue 20, 27 October 2026.
We demonstrate a silicon sawtooth grating that simultaneously hosts three quasi‐BIC resonances. Leveraging the enhanced local field and directional coupling asymmetry, the device achieves a maximum nonreciprocal intensity ratio (NRIR) of 2.99 and an isolation exceeding 67 dB.
Changqing Zhong, Menghan Liu, Lujun Hong, Yun Shen, Jing Chen, Jiangtao Lei, Tianjing Guo   +6 more
wiley   +2 more sources

Curved, Expanded, Inclined and Mirror-Symmetric Diffraction Patterns of 2D-Cross-Grating--- Rotating Grating Around Three Axes (2)

, 2022
study phenomena of grating experimentally. show Curved, Expanded, Inclined and Mirror-Symmetric Diffraction Patterns of 2D-Cross-Grating--- Rotating Grating Around Three Axes (2) This rather ancient grating experiment continues to surprise.
hui peng (12544597)
core   +1 more source

A novel continuously variable angular vertical comb-drive with application in scanning micromirror [PDF]

, 2013
An angular vertical comb-drive (AVC) with electrically controllable initial comb-offset is presented in the context of a single crystalline silicon scanning micromirror.
Lì, Lì L., Uttamchandani, Deepak G., Bauer, Ralf R., Brown, Gordon G.   +3 more
core   +4 more sources

Fast Terahertz Computed-Tomography Imaging With a Quantum-Cascade Laser and a Scanning Mirror [PDF]

, 2013
A terahertz transmission imaging system based on a quantum-cascade laser (QCL), a fast scanning mirror, and a sensitive Ge:Ga detector is demonstrated. In order to reduce artifacts, special care was taken on the optics and the conversion of the measured
H.-W. Hubers, H. Richter, Richter, Heiko, Schrottke, Lutz, Grahn, H. T., Hübers, Heinz-Wilhelm, Wienold, Martin, Rothbart, Nick, M. Wienold, L. Schrottke, H. T. Grahn, N. Rothbart   +11 more
core   +1 more source

Reduction of interchannel interference noise in a two-channel grating-based OCDMA system using a nonlinear optical loop mirror [PDF]

, 2001
We show that a nonlinear optical switch can be used to suppress the interchannel noise generated under multiuser operation within a coherent, direct-sequence optical code-division multiple-access (OCDMA) system.
Teh, P.C., Ibsen, M., Petropoulos, P., Richardson, D.J., Lee, J.H.   +4 more
core   +1 more source

An ellipsoidal mirror for focusing neutral atomic and molecular beams [PDF]

, 2010
Manipulation of atomic and molecular beams is essential to atom optics applications including atom lasers, atom lithography, atom interferometry and neutral atom microscopy.
Galas, J., Sondergard, E., Reisinger, T., Miranda, R., Fladischer, K., Farias, D., Ernst, W.E., Piatkowski, B., Mayrhofer, V., Surma, B., Miros, A., Holst, B., Reingruber, H., Allison, W., Sitarek, S., Allison,, W., Nieto, P., Ross, A.E., Barredo, D., MacLaren, D.A., Litwin, D., Ross A.E., Nieto P., Allison, William, Farías D., Reisinger T., Sitarek S., Barredo D., Miros A., Barredo, Daniel, Søndergård E., Fladischer K., Galas J., Surma B., Ernst W.E., Litwin D., Allison W., Piatkowski B., Miranda, Rodolfo, Nieto, Pablo, Hoist B., MacLaren D.A., Reingruber H., Farías, Daniel, MacLaren, Donald A., Mayrhofer V.   +45 more
core   +1 more source

Pseudo-heterodyne signal processing scheme for interrogation of fiber Bragg grating sensor arrays [PDF]

, 1998
An intensity-based interrogation technique for arrays of fiber bragg grating (FBG) sensors is reported. The technique is based upon each FBG forming one mirror of a Michelson interferometer.
Clare K. Chatterjea, Chatterjea, C. K., Ralph P. Tatam, Tatam, Ralph P., James, Stephen W., Stephen W. James   +5 more
core   +1 more source

A novel pitch evaluation of one-dimensional gratings based on a cross-correlation filter [PDF]

, 2014
If one-dimensional (1D), p–period and arbitrarily structured grating position-related topographical signals coexist with noise, it is difficult to evaluate the pitch practically using the centre-of-gravity (CG) method.
Chen, Xiaomei, Koenders, Ludger
core   +3 more sources