Del Mar Photonics features customer: Professor James Heyman, Macalester College

The PCA detector will be used in Macalester College Professor James Heyman's laboratory for ultrafast THz spectroscopy.  Heyman primarily studies electron dynamics in semiconductors and semiconductor heterostructures.  Research is conducted with Macalester undergraduates, providing these students with important training in research techniques in Physics and Photonics.  There is little barrier between research and teaching at a liberal arts college like Macalester, and Heyman's ultrafast THz lab is also used for demonstrations and instructional labs in the courses Modern Physics, Optics and Electromagnetic Theory.

PCA - Photoconductive Antenna for terahertz waves
Del Mar Photonics - PCA brochure - buy online - PCA Q&A

We  use ultrafast optical techniques to investigate carrier transport and hot-carrier effects in semiconductors and semiconductor quantum wells.  Our principle experimental technique is ultrafast THz spectroscopy, which lets us impulsively excite a material with a femtosecond optical pulse or single-cycle electromagnetic pulse, and record the resulting motion of charge in time.  This allows us to investigate charge transport and observe hot-carrier phenomena in semiconductors and semiconductor heterostructures on time-scales that will be relevant to future electronic devices. James Heyman
Professor of Physics and Chair
Ph.D., University of California at Berkeley, 1992

James Heyman is interested in experimental condensed matter physics and ultrafast laser spectroscopy. Students regularly collaborate with him in his NSF-funded research on ultrafast processes in semiconductors and the generation of picosecond pulses of electromagnetic radiation.

We use ultrafast optical techniques to investigate carrier transport and hot-carrier effects in semiconductors and semiconductor quantum wells. Our principle experimental technique is ultrafast THz spectroscopy, which lets us impulsively excite a material with a femtosecond optical pulse or single-cycle electromagnetic pulse, and record the resulting motion of charge in time. This allows us to investigate charge transport and observe hot-carrier phenomena in semiconductors and semiconductor heterostructures on time-scales that will be relevant to future electronic devices.

Papers  (for complete list go here)

J. N. Heyman, D. Bell*, T. Khumalo*, "Terahertz Photo-Hall Measurements of Carrier Mobility in GaAs and InP".  Applied Physics Letters 88 (2006): 162104.

J. N. Heyman, N. Coates* , A. Reinhardt *, and G. Strasser, "Diffusion and Drift in Terahertz Emission at GaAs Surfaces".  Applied Physics Letters 83 (2003): 5476.

J. N. Heyman, P. Neocleous*, D. Hebert*, P.A. Crowell, T. Müller, K. Unterrainer, 揟erahertz emission from GaAs and InAs in a Magnetic Field?Physical Review B64, (2001) 085202.

J. N. Heyman, R. Kersting, K. Unterrainer. 揟ime-Domain Measurement of Intersubband Oscillations in a Quantum Well?Applied Physics Letters 72 (Feb. 1998): 644-646.

J. N. Heyman, J. Barnhorst*, K. Unterrainer, J. Williams, K. Campman, P.F.Hopkins, A.C.Gossard. 揑ntersubband scattering of cold electrons in a coupled quantum well with subband spacing below the optical phonon energy .? Physica E 2 (1998): 195-199.

Del Mar Photonics products related to ultrafast optical techniques and THZ spectroscopy:

Trestles Femtosecond Ti:Sapphire laser - Trestles 50 Manual
Trestles 20 Manual - 20/50/100 fs oscillators - FemtoStart
Trestles Finesse Ti:Sapphire oscillator - Q&A - LQ
Wedge-M Multipass Ti:Sapphire Amplifier
Amplified Ti:Sapphire System Teahupoo

Mavericks Femtosecond Cr:Forsterite laser (around 1250 nm)

Tamarack Femtosecond Er-doped fiber laser (around 1560 nm)
Buccaneer Er-doped Femtosecond OA Fiber Laser (1560nm)
Buccaneer SHG (780nm) femtosecond fiber lasers
SHG unit for femtosecond fiber lasers
Cannon Ultra-Broadband Light Source
Femtosecond Fiber Lasers from Del Mar Photonics - Er - Yb (pdf)

Jaws Laser System Cr:Forsterite Multi-Terawatt Amplified Laser
CORTES-E-1 Table 朤op Terawatt Ti:Sapphire laser
Cortes-E Femtosecond TW Laser - description
Cortes-800 40 TW 30 fs Amplified Ti:Sapphire Laser - summary
Cortes-O 200 TW Femtosecond Laser
Cortes-K Femtosecond Seed Laser for Petawatt KrF Excimer Laser
OPCPA 200TW laser

Femtosecond Autocorrelators Reef-RT (scanning)
and Reef-SS (single-shot)  - Reef-RT - buy online - specs
Autocorrelation technique - Reef-RT AA-10D manual
Avoca SPIDER Spectral Phase Measurement System - manual
Rincon Cross-Correlator Pulse Profiling Systems - TOCC
Rincon SS Single shot third-order cross-correlator
Optimization of Rincon TOAC for customer laser system

Hatteras Ultrafast Transient Absorption Spectrometer
Beacon Femtosecond Fluorescence Up-conversion Spectrometer
Femtosecond NSOM Ultrafast Near field Optical Microscope
JIBE White Light Continuum Generator
Complete Ultrafast Dynamics System - fs

Femtosecond Harmonic Generators

Kirra Faraday Optical Rotators and Isolators - models - 800nm - 1064nm - Faraday Q&A - Broadband Isolator for fs Ti:Sa laser
High Power Faraday Rotators and Isolators -FIR

Pismo Pulse Pickers: Electro-Optical Ultrafast Shutters - pdf brochure
Femtosecond Pulse Pickers Pismo Questions and Answers - 100kHz
Pismo 8-1 Manual - Pismo 8-25 Manual

4W/6W DPPS Green Laser

Pacifica Terahertz Spectrometer
Terahertz Spectroscopic Radar Mobile System for Detection of Concealed Explosives

Saturable Absorption Mirrors (SAM) - (pdf) buy online - RSAM

Photoconductive Antenna (PCA) for Terahertz Applications
PCA models - Q&A - buy online

 

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