Utilizing our 30 years of experience in optoelectronics, Marktech’s customization

process focuses on customer needs and applications. Instead of using standardized–

but perhaps non-optimized–parts, Marktech allows advantageous custom product

variations to enhance your product design.

Custom packaging and electrical sorting of products offer further differentiation. Marktech provides the

designer with insights concerning custom variations–variations that optimize electrical, optical, and

thermal characteristics–without the need for large volume commitments. With manufacturing facilities in

California, Germany, and Japan, Marktech is a vertically-integrated company, allowing us to produce detector

components quickly, thus decreasing your time to market. We can even produce your entire package in the

United States, if need be.

To solve your needs, Marktech engineers will discuss with you:

• Application needs speciﬁ c to your project

• Optimization recommendations for component and assembly packaging, technology, and thermal and

electrical parameters

• Manufacturing of dedicated end-products in support of your speciﬁ cations and needs

In this second installment in our six-part series on Marktech’s customization capabilities, we focus on

optoelectronic detector materials, to allow options to customize detector components for optimal mating

with compatible emitters.

Overview

Photodetectors are sensors, detecting light and converting the photons into measurable currents, and

are therefore useful for applications ranging from water faucets to nuclear transient events. With varied

technologies and packaging, speciﬁ c measurements can be made that are ideal for your applications.

Customization of Optoelectronic Detectors

Part Two in a Six-Part Series

Marktech devices are solely solid-state devices (there are no photomultiplier tubes in our product line,

although our products may supply similar functionality). Response rates can be as fast as 300 picoseconds.

Light levels that can be measured range from tens of photons to massive levels. Wavelengths can range

from 150nm to greater than 3000nm.

Each photodetector uses p-n or n-p junctions as part of either a photodiode or phototransistor construction,

effectively working as an inverse function from the typical operation of a light emitting diode. Depending on

the technology used, the detectors provide current response to speciﬁ c ranges of light wavelength.

Detector Materials and Characteristics

The materials used may be silicon, GaP, or InGaAs. The P and N epitaxial layers of the wafer materials can

be optimized for speciﬁ c customer speciﬁ cations and desired characteristics, including minimum reﬂ ection,

Optimized Responsivity low dark current, minimum series resistance, low capacitance, fast response, low

cross talk, and more. The detectors can be packaged in a variety of packages from metal can and standard

3mm and 5mm plastic packages, to surface-mount...or virtually any custom package assembly. Detector

applications range from simple door opening to the latest cancer PET scan system.

Detector Wavelengths

Available products have wavelengths varying from 150nm (UV) through the visible range (440 to 700nm),

through SWIR (short wavelength infrared) (up to 2600nm), and beyond to MWIR (medium wavelength IR)

(>3000nm). This link to our

online Product Selector Guide helps in the selection of the emitter wavelengths,

while also indicating compatible detectors. Tight binning by Marktech can provide uniform wavelength

characteristics to optimize the application and mating detectors’ sensitivities, providing process-controlled,

uniform product solutions.

Marktech Photodetector Variations:

• Silicon photodetectors (400nm to 1100nm): photovoltaic, photoconductive photodiodes, and

phototransistors

• Silicon avalanche photodiodes (400nm to 1100nm, with 800nm, 905nm optimization)

• UV detectors (150nm to 450nm)

• InGaAs PIN photodetectors (800nm to 2600nm) and SWIR (short wavelength IR) detectors (1050nm to

1720nm)

Products are also available in epitaxial wafer form, and can be packaged as photoreﬂ ectors, arrays, and

hybrid parts. For part listing and additional information,

visit our detectors catalog.

Silicon Photodetectors (400nm to 1100nm):

Marktech’s silicon phototransistors can be utilized in applications requiring very high sensitivity, uniform