scholarly journals Measurement of femtosecond pulses in the focal point of a high-numerical-aperture lens by two-photon absorption

1995 ◽  
Vol 20 (9) ◽  
pp. 1038 ◽  
Author(s):  
M. Müller ◽  
J. Squier ◽  
G. J. Brakenhoff
Keyword(s):  
Focal Point ◽  
Numerical Aperture ◽  
Photon Absorption ◽  
Femtosecond Pulses ◽  
High Numerical Aperture ◽  
Two Photon Absorption ◽  
Two Photon

Influence of propagation and external phase in sequential two-photon absorption of femtosecond pulses

2005 ◽  
Vol 30 (22) ◽  
pp. 3081 ◽  
Author(s):  
H. G. Barros ◽  
W. Lozano B. ◽  
S. S. Vianna ◽  
L. H. Acioli
Keyword(s):  
Photon Absorption ◽  
Femtosecond Pulses ◽  
Two Photon Absorption ◽  
Two Photon ◽  
External Phase

Effect of low numerical-aperture femtosecond two-photon absorption on (SU-8) resist for ultrahigh-aspect-ratio microstereolithography

2005 ◽  
Vol 97 (5) ◽  
pp. 054907 ◽  
Author(s):  
W. H. Teh ◽  
U. Dürig ◽  
U. Drechsler ◽  
C. G. Smith ◽  
H.-J. Güntherodt
Keyword(s):  
Aspect Ratio ◽  
Numerical Aperture ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon

Two-Photon Absorption Laser Assisted Device Alteration Using 1340nm CW Laser: Critical Timing Fault Isolation & Localization for 32nm MPU and Beyond

2010 ◽  
Author(s):  
Baohua Niu ◽  
Pat Pardy ◽  
Joe Davis ◽  
Mel Ortega ◽  
Travis Eiles
Keyword(s):  
High Power ◽  
Continuous Wave ◽  
Numerical Aperture ◽  
Fault Isolation ◽  
Photon Absorption ◽  
Solid Immersion Lens ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Critical Timing ◽  
Power Densities

Abstract In this paper, we report on the first observation and study of two-photon absorption (TPA) based laser assisted device alteration (LADA) using a continuous-wave (CW) 1340nm laser. The study was conducted using LADA systems equipped with high numerical aperture (NA) liquid and solid immersion lens objectives on Intel’s 45 nm and 32 nm multiprocessor units (MPU) and test chips. The power densities achievable using these lenses are similar to those reported in the literature for TPA in silicon of CW 1455nm light [1]. We show that the induced photocurrent has a quadratic dependence on the input laser power, a key indicator of two-photon phenomenon. Our results imply that even when using 1340nm wavelength CW lasers, there is a potential for laser invasiveness with the high power densities achievable using high NA objectives. Laser induced damage of the DUT is also a possibility at these high power densities, particularly with the solid immersion lens (SIL). However, we show that the DUT damage threshold can be increased by reducing the DUT’s temperature. Finally, we present results demonstrating a >40% improvement in localization of critical timing faults using TPA based LADA, when compared to traditional 1064nm wavelength (single-photon absorption) LADA.

Frequency up-conversion of 800-nm femtosecond pulses by two-photon absorption in doped PMMA fibers

2003 ◽  
Author(s):  
Grace Jordan ◽  
Takeyuki Kobayashi ◽  
Werner J. Blau ◽  
Hartwig Tillmann ◽  
Hans-Heinrich Hoerhold
Keyword(s):  
Photon Absorption ◽  
Femtosecond Pulses ◽  
Two Photon Absorption ◽  
Two Photon

Kerr nonlinearity and two-photon absorption in two-beam coupling of femtosecond pulses

2007 ◽  
Vol 75 (5) ◽  
Author(s):  
C. A. C. Bosco ◽  
Claudio Floridia ◽  
G. S. Maciel ◽  
Cid B. de Araújo ◽  
L. H. Acioli
Keyword(s):  
Kerr Nonlinearity ◽  
Photon Absorption ◽  
Femtosecond Pulses ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Beam Coupling

scholarly journals Femtosecond Laser Structuring of As2S3 Glass for Erasable and Permanent Optical Memory

2007 ◽  
Vol 997 ◽  
Author(s):  
Saulius Juodkazis ◽  
Andrei V. Rode ◽  
Toshiaki Kondo ◽  
Hiroaki Misawa ◽  
Marek Samoc ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Absorption Coefficient ◽  
Nonlinear Absorption ◽  
Optical Memory ◽  
Photon Absorption ◽  
Femtosecond Pulses ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Beam Laser ◽  
Laser Structuring

AbstractThe nonlinear absorption coefficient of As2S3 glass has been measured to be 2.0 cm/GW for femtosecond pulses at 800 nm. Femtosecond laser structuring via two photon absorption in bulk As2S3 glass by erasable and permanent photo-darkening is demonstrated using both holographic and direct multi-beam laser writing.

Sign in / Sign up

Export Citation Format

Share Document