Del Mar Photonics

Del Mar Photonics featured customer Bruce Weisman. Professor Weisman ordered Trestles Ti:Sapphire laser with built-in DPSS pump laser.

Professor Weisman wrote: Our applications are for carbon nanotube excitation, mostly with a cw beam but in some experiments with mode-locked pulses.

Del Mar Photonics offered Trestles Ti:Sapphire model with both CW and femtosecond modes of operation.
Detailed laser specifications are as follows (request a quote):

Trestles Ti:Sapphire laser with built-in DPSS pump laser
Ti:Sapphire oscillator having a tuning range of 710-920 nm;
Output power: 30mW (@3W pump, in the whole range);
Spatial mode: TEMoo;
Polarization: linear horizontal;
Repetition rate: 80 MHz;
Pulse duration: <100 fs
Electronic starter with TTL output for mode-locked mode
observation. Output mirrors included.
USB-controlled tuning slit for wavelength tuning

3BRF-TM 3-plate BRF for CW lasers (step motor controlled tuning)
Provides CW tuning and 40 GHz linewidth of the Trestles fs
lasers in CW mode; output power @700 nm - >50 mW (3W pump)

3 W pump DPSS laser with control and power supply unit
Power: 3 W
Wavelength: 532 nm
Beam size: 2.0 mm
Spatial mode: TEM00
Bandwidth: 30 GHz
Divergence: 0.4 mrad
M squared: < 1.1
Power stability: < 0.4 % RMS
Noise: < 0.4% RMS
Noise bandwidth: 1 Hz - 6 MHz
Pointing stability: < 2 microrads/C
Polarization ratio: 100:1
Polarization direction: horizontal
Coherence length: < 1 cm
Beam angle: < 1 mrad
Umbilical length: 1.5 m
Warm-up time: 10 min

Trestles CW/fs laser for carbon nanotubes spectroscopy and photophysics research at Rice University


Single nanotube experiment with tunable Ti:Sapphire laser Trestles Finesse


R. Bruce Weisman Professor of Chemistry

Research Statement
Dr. R. Bruce Weisman and his group investigate the spectroscopy and photophysics of fullerenes and carbon nanotubes. All of these are closed nanoscopic structures formed from carbon atoms. Fullerenes, such as C60, C70, and their chemical derivatives, have unusual molecular properties that cause interesting behaviors following the absorption of light. Time-resolved absorption and emission methods are used to study radiationless decay, photochemical reactions, and energy transfer in fullerenes. Another major research topic is single-walled carbon nanotube spectroscopy. Following the discovery in Weisman?s lab of near-infrared nanotube fluorescence, the group has measured and unraveled the absorption and emission spectra of more than 30 semiconducting nanotube species. Follow-up projects include detailed elucidation of nanotube electronic structure, as well as applications in non-invasive biomedical imaging and analytical nanotechnology.

Selected Publications
R. Bruce Weisman and Shekhar Subramoney "Carbon Nanotubes." Interface (Summer, 2006): 42-46.

J. P. Casey, S. M. Bachilo, C. H. Moran, and R. B. Weisman "Chirality-Resolved Length Analysis of Single-Walled Carbon Nanotube Samples through Shear-Aligned Photoluminescence Anisotropy." ACS Nano, 2 (2008): 1738-1746.

J. P. Casey, S. M. Bachilo, and R. B. Weisman "Efficient Photosensitized Energy Transfer and Near-IR Fluorescence from Porphyrin/SWNT Complexes." J. Mater. Chem., 18 (2008): 1510-1516.

R. B. Weisman "Optical Spectroscopy of Single-Walled Carbon Nanotubes." Contemporary Concepts of Condensed Matter Science. Carbon Nanotubes: Quantum Cylinders of Graphene, 3 (2008): 109-133.

D. A. Tsyboulski, E. L. Bakota, L. S. Witus, J.-D. R. Rocha, J. D. Hartgerink, and R. B. Weisman "Self-Assembling Peptide Coatings Designed for Highly Luminescent Suspension of Single-Walled Carbon Nanotubes." J. Am. Chem. Soc., 130 (2008): 17134-117140.

C. D. Doyle, J.-D. R. Rocha, R. B. Weisman, and J. M. Tour "Structure-dependent Reactivity of Semiconducting Single-Walled Carbon Nanotubes with Benzene Diazonium Salts." J. Am. Chem. Soc., 130 (2008): 6795-6800.

D. A. Tsyboulski, S. M. Bachilo, A. B. Kolomeisky, and R. B. Weisman "Translational and Rotational Dynamics of Individual Single-Walled Carbon Nanotubes in Aqueous Suspension." ACS Nano, 2 (2008): 1770-1776.

Robert F. Curl and R. Bruce Weisman "Biography of Richard Errett Smalley." J. Phys. Chem. C, 111 (2007): 17653-17655.

Christopher J. Gannon, Paul Cherukuri, Boris I. Yakobson, Laurent Cognet, John S. Kanzius, Carter Kittrell, R. Bruce Weisman, Matteo Pasquali, Howard K. Schmidt, Richard E. Smalley, and Steven A. Curley "Carbon Nanotube-enhanced Thermal Destruction of Cancer Cells in a Noninvasive Radiofrequency Field." Cancer, 110 (2007): 2654-2665.

Laurent Cognet, Dmitri A. Tsyboulski, John-David R. Rocha, Condell D. Doyle, James M. Tour and R. Bruce Weisman "Stepwise Quenching of Exciton Fluorescence in Carbon Nanotubes by Single Molecule Reactions." Science, 316 (2007): 1465-1468.

"Quantitative Analysis of Bulk SWCNT Samples using Near-IR Fluorimetry, Focus Session on Development of Purity Evaluation Criteria and Quality Assurance Standards for Carbon Nanotubes,." Materials Research Society Meeting, Boston, Massachusetts. (November 30, 2008)

"Near-infrared Fluorescence of Single-Walled Carbon Nanotubes: a Tool for Developing Medical Applications." Nanomedicine Summit 08, Cleveland, Ohio. (September 25, 2008)

"Single-walled Carbon Nanotubes: Physical Properties and Biomedical Applications." Howard Hughes Medical Institute Summer Lecture Series, Harvey Mudd College, Claremont, California. (July 16, 2008)

"Near-IR Fluorescence of Single-Walled Carbon Nanotubes: A Tool for Developing Medical Applications." Carbon Nanotube Biology, Medicine, and Toxicology Symposium, Montpelier, France. (June 28, 2008)

"Qualitative and Quantitative Analysis of Bulk SWNT Samples using Near-IR Fluorimetry." Workshop on Metrology, Standardization, and Industrial Quality of Nanotubes, Montpelier, France. (June 28, 2008)

Editorial Positions

Associate Editor, Applied Physics A, Springer-Verlag,, (2008).
Paul Cherukuri, Ph.D. "Biomedical Studies of Single-Walled Carbon Nanotubes Using Near-Infrared Fluorescence." (2007).(Thesis or Dissertation Director)

Dmitry Tsyboulski, Ph.D. "Spectroscopic and Optical Imaging Studies of Fullerene Complexes and Single-Walled Carbon Nanotubes." (2006).(Thesis or Dissertation Director)

Eric Booth, PhD. "Photophysical Studies of Selected C84 Isomers, C80 Species, Aqueous C60 Colloid, and a C60-Amino Acid Derivative." (2005).(Thesis or Dissertation Director)


Elected Fellow, American Physical Society. (2008).

Paul Frison Accelator Award for Applied NanoFluorescence, Houston Business Journal. (2007).

Institute of Physics in Ireland Lecturer, . (2005).